core refactoring (#69)

bin_fhe/blind_rotation/cggi.rs

@@ -11,10 +11,11 @@ use backend::hal::{
 use itertools::izip;
 
 use crate::{
-    GLWECiphertext, GLWECiphertextToMut, GLWEExternalProductFamily, GLWEOps, Infos, LWECiphertext, LWECiphertextToRef,
-    LookUpTableRotationDirection, TakeGLWECt,
+    GLWEOps, Infos, LookUpTableRotationDirection, TakeGLWECt,
     blind_rotation::{key::BlindRotationKeyCGGIExec, lut::LookUpTable},
     dist::Distribution,
+    layouts::{GLWECiphertext, GLWECiphertextToMut, LWECiphertext, LWECiphertextToRef},
+    trait_families::GLWEExternalProductFamily,
 };
 
 pub trait CCGIBlindRotationFamily<B: Backend> = VecZnxBigAllocBytes

bin_fhe/blind_rotation/key.rs

@@ -1,17 +1,23 @@
 use backend::hal::{
     api::{
         FillUniform, Reset, ScratchAvailable, SvpPPolAlloc, SvpPrepare, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace,
-        ZnxInfos, ZnxView, ZnxViewMut,
+        VmpPMatAlloc, VmpPMatPrepare, ZnxInfos, ZnxView, ZnxViewMut,
     },
     layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, ScalarZnx, ScalarZnxToRef, Scratch, SvpPPol, WriterTo},
 };
 use sampling::source::Source;
 
 use crate::{
-    Distribution, GGSWCiphertext, GGSWCiphertextExec, GGSWEncryptSkFamily, GGSWLayoutFamily, GLWESecretExec, Infos, LWESecret,
+    Distribution, Infos,
+    layouts::{
+        GGSWCiphertext, LWESecret,
+        prepared::{GGSWCiphertextExec, GLWESecretExec},
+    },
 };
 use std::fmt;
 
+use crate::trait_families::GGSWEncryptSkFamily;
+
 #[derive(Clone)]
 pub struct BlindRotationKeyCGGI<D: Data> {
     pub(crate) keys: Vec<GGSWCiphertext<D>>,
@@ -246,12 +252,12 @@ impl<D: Data, B: Backend> BlindRotationKeyCGGIExec<D, B> {
     }
 }
 
-pub trait BlindRotationKeyCGGIExecLayoutFamily<B: Backend> = GGSWLayoutFamily<B> + SvpPPolAlloc<B> + SvpPrepare<B>;
+pub trait BlindRotationKeyCGGIExecLayoutFamily<B: Backend> = SvpPPolAlloc<B> + SvpPrepare<B>;
 
 impl<B: Backend> BlindRotationKeyCGGIExec<Vec<u8>, B> {
     pub fn alloc(module: &Module<B>, n_glwe: usize, n_lwe: usize, basek: usize, k: usize, rows: usize, rank: usize) -> Self
     where
-        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B>,
+        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B> + VmpPMatAlloc<B> + VmpPMatPrepare<B>,
     {
         let mut data: Vec<GGSWCiphertextExec<Vec<u8>, B>> = Vec::with_capacity(n_lwe);
         (0..n_lwe).for_each(|_| {
@@ -269,7 +275,7 @@ impl<B: Backend> BlindRotationKeyCGGIExec<Vec<u8>, B> {
     pub fn from<DataOther>(module: &Module<B>, other: &BlindRotationKeyCGGI<DataOther>, scratch: &mut Scratch<B>) -> Self
     where
         DataOther: DataRef,
-        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B>,
+        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B> + VmpPMatAlloc<B> + VmpPMatPrepare<B>,
     {
         let mut brk: BlindRotationKeyCGGIExec<Vec<u8>, B> = Self::alloc(
             module,
@@ -289,7 +295,7 @@ impl<D: DataMut, B: Backend> BlindRotationKeyCGGIExec<D, B> {
     pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &BlindRotationKeyCGGI<DataOther>, scratch: &mut Scratch<B>)
     where
         DataOther: DataRef,
-        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B>,
+        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B> + VmpPMatAlloc<B> + VmpPMatPrepare<B>,
     {
         #[cfg(debug_assertions)]
         {

bin_fhe/blind_rotation/key_compressed.rs

@@ -4,9 +4,14 @@ use backend::hal::{
 };
 use sampling::source::Source;
 
-use crate::{Distribution, GGSWCiphertextCompressed, GGSWEncryptSkFamily, GLWESecretExec, Infos, LWESecret};
+use crate::{
+    Distribution, Infos,
+    layouts::{LWESecret, compressed::GGSWCiphertextCompressed, prepared::GLWESecretExec},
+};
 use std::fmt;
 
+use crate::trait_families::GGSWEncryptSkFamily;
+
 #[derive(Clone)]
 pub struct BlindRotationKeyCGGICompressed<D: Data> {
     pub(crate) keys: Vec<GGSWCiphertextCompressed<D>>,

bin_fhe/blind_rotation/tests/generic_cggi.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
         ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddNormal, VecZnxAddScalarInplace, VecZnxEncodeCoeffsi64, VecZnxFillUniform,
-        VecZnxRotateInplace, VecZnxSub, VecZnxSwithcDegree, ZnxView,
+        VecZnxRotateInplace, VecZnxSub, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare, ZnxView,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -12,13 +12,19 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    BlindRotationKeyCGGI, BlindRotationKeyCGGIExec, BlindRotationKeyCGGIExecLayoutFamily, CCGIBlindRotationFamily,
-    GLWECiphertext, GLWEDecryptFamily, GLWEPlaintext, GLWESecret, GLWESecretExec, GLWESecretFamily, Infos, LWECiphertext,
-    LWECiphertextToRef, LWEPlaintext, LWESecret, LookUpTable, cggi_blind_rotate, cggi_blind_rotate_scratch_space, mod_switch_2n,
+    BlindRotationKeyCGGI, BlindRotationKeyCGGIExec, BlindRotationKeyCGGIExecLayoutFamily, CCGIBlindRotationFamily, Infos,
+    LookUpTable, cggi_blind_rotate, cggi_blind_rotate_scratch_space,
+    layouts::{
+        GLWECiphertext, GLWEPlaintext, GLWESecret, LWECiphertext, LWECiphertextToRef, LWEPlaintext, LWESecret,
+        prepared::GLWESecretExec,
+    },
+    mod_switch_2n,
 };
 
+use crate::trait_families::{GLWEDecryptFamily, GLWESecretExecModuleFamily};
+
 pub(crate) trait CGGITestModuleFamily<B: Backend> = CCGIBlindRotationFamily<B>
-    + GLWESecretFamily<B>
+    + GLWESecretExecModuleFamily<B>
     + GLWEDecryptFamily<B>
     + BlindRotationKeyCGGIExecLayoutFamily<B>
     + VecZnxFillUniform
@@ -27,7 +33,9 @@ pub(crate) trait CGGITestModuleFamily<B: Backend> = CCGIBlindRotationFamily<B>
     + VecZnxEncodeCoeffsi64
     + VecZnxRotateInplace
     + VecZnxSwithcDegree
-    + VecZnxSub;
+    + VecZnxSub
+    + VmpPMatAlloc<B>
+    + VmpPMatPrepare<B>;
 pub(crate) trait CGGITestScratchFamily<B: Backend> = VecZnxDftAllocBytesImpl<B>
     + VecZnxBigAllocBytesImpl<B>
     + ScratchOwnedAllocImpl<B>

bin_fhe/circuit_bootstrapping/circuit_bootstrapping.rs

@@ -6,7 +6,7 @@ use backend::hal::{
         TakeVecZnxSlice, VecZnxAddInplace, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxAutomorphismInplace,
         VecZnxBigAutomorphismInplace, VecZnxBigSubSmallBInplace, VecZnxCopy, VecZnxDftCopy, VecZnxDftToVecZnxBigTmpA,
         VecZnxNegateInplace, VecZnxNormalizeInplace, VecZnxNormalizeTmpBytes, VecZnxRotateInplace, VecZnxRshInplace, VecZnxSub,
-        VecZnxSubABInplace, VecZnxSwithcDegree,
+        VecZnxSubABInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch},
     oep::{ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl},
@@ -14,11 +14,17 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    AutomorphismKey, AutomorphismKeyEncryptSkFamily, AutomorphismKeyExec, BlindRotationKeyCGGI, BlindRotationKeyCGGIExec,
-    BlindRotationKeyCGGIExecLayoutFamily, CCGIBlindRotationFamily, GGSWCiphertext, GGSWEncryptSkFamily, GLWECiphertext, GLWEOps,
-    GLWESecret, GLWESecretExec, GLWESecretFamily, GLWETensorKey, GLWETensorKeyEncryptSkFamily, GLWETensorKeyExec,
-    GLWETraceFamily, Infos, LWECiphertext, LWESecret, LookUpTable, LookUpTableRotationDirection, TakeGGLWE, TakeGLWECt,
-    cggi_blind_rotate,
+    BlindRotationKeyCGGI, BlindRotationKeyCGGIExec, BlindRotationKeyCGGIExecLayoutFamily, CCGIBlindRotationFamily, GLWEOps,
+    Infos, LookUpTable, LookUpTableRotationDirection, TakeGGLWE, TakeGLWECt, cggi_blind_rotate,
+    layouts::{
+        AutomorphismKey, GGSWCiphertext, GLWECiphertext, GLWESecret, GLWETensorKey, LWECiphertext, LWESecret,
+        prepared::{AutomorphismKeyExec, GLWESecretExec, GLWETensorKeyExec},
+    },
+};
+
+use crate::trait_families::{
+    AutomorphismKeyEncryptSkFamily, GGSWEncryptSkFamily, GLWESecretExecModuleFamily, GLWETensorKeyEncryptSkFamily,
+    GLWETraceModuleFamily,
 };
 
 pub struct CircuitBootstrappingKeyCGGI<D: Data> {
@@ -45,8 +51,8 @@ impl CircuitBootstrappingKeyCGGI<Vec<u8>> {
         scratch: &mut Scratch<B>,
     ) -> Self
     where
-        Module<B>: GLWESecretFamily<B>
-            + GGSWEncryptSkFamily<B>
+        Module<B>: GGSWEncryptSkFamily<B>
+            + GLWESecretExecModuleFamily<B>
             + VecZnxAddScalarInplace
             + AutomorphismKeyEncryptSkFamily<B>
             + VecZnxAutomorphism
@@ -111,7 +117,7 @@ impl<B: Backend> CircuitBootstrappingKeyCGGIExec<Vec<u8>, B> {
         scratch: &mut Scratch<B>,
     ) -> CircuitBootstrappingKeyCGGIExec<Vec<u8>, B>
     where
-        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B>,
+        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B> + VmpPMatAlloc<B> + VmpPMatPrepare<B>,
     {
         let brk: BlindRotationKeyCGGIExec<Vec<u8>, B> = BlindRotationKeyCGGIExec::from(module, &other.brk, scratch);
         let tsk: GLWETensorKeyExec<Vec<u8>, B> = GLWETensorKeyExec::from(module, &other.tsk, scratch);
@@ -137,7 +143,7 @@ pub trait CGGICircuitBootstrapFamily<B: Backend> = VecZnxRotateInplace
     + VecZnxNegateInplace
     + VecZnxCopy
     + VecZnxSubABInplace
-    + GLWETraceFamily<B>
+    + GLWETraceModuleFamily<B>
     + VecZnxRotateInplace
     + VecZnxAutomorphismInplace
     + VecZnxBigSubSmallBInplace<B>;

bin_fhe/circuit_bootstrapping/test_fft64/circuit_bootstrapping.rs

@@ -5,7 +5,7 @@ use backend::{
         api::{
             ModuleNew, ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddNormal, VecZnxAddScalarInplace, VecZnxAutomorphism,
             VecZnxEncodeCoeffsi64, VecZnxFillUniform, VecZnxNormalizeInplace, VecZnxRotateInplace, VecZnxStd, VecZnxSwithcDegree,
-            ZnxView, ZnxViewMut,
+            VmpPMatAlloc, VmpPMatPrepare, ZnxView, ZnxViewMut,
         },
         layouts::{Backend, Module, ScalarZnx, ScratchOwned},
         oep::{
@@ -18,14 +18,19 @@ use backend::{
 use sampling::source::Source;
 
 use crate::{
-    AutomorphismKeyEncryptSkFamily, BlindRotationKeyCGGIExecLayoutFamily, GGSWAssertNoiseFamily, GGSWCiphertext,
-    GGSWCiphertextExec, GGSWEncryptSkFamily, GLWECiphertext, GLWEDecryptFamily, GLWEPlaintext, GLWESecret, GLWESecretExec,
-    GLWESecretFamily, GLWETensorKeyEncryptSkFamily, LWECiphertext, LWESecret,
+    BlindRotationKeyCGGIExecLayoutFamily,
     circuit_bootstrapping::circuit_bootstrapping::{
         CGGICircuitBootstrapFamily, CircuitBootstrappingKeyCGGI, CircuitBootstrappingKeyCGGIExec,
         circuit_bootstrap_to_constant_cggi, circuit_bootstrap_to_exponent_cggi,
     },
-    lwe::LWEPlaintext,
+    layouts::{
+        GGSWCiphertext, GLWECiphertext, GLWEPlaintext, GLWESecret, LWECiphertext, LWEPlaintext, LWESecret,
+        prepared::{GGSWCiphertextExec, GLWESecretExec},
+    },
+};
+
+use crate::trait_families::{
+    AutomorphismKeyEncryptSkFamily, GGSWAssertNoiseFamily, GGSWEncryptSkFamily, GLWEDecryptFamily, GLWETensorKeyEncryptSkFamily,
 };
 
 #[test]
@@ -36,12 +41,10 @@ fn test_to_exponent() {
 
 fn to_exponent<B: Backend>(module: &Module<B>)
 where
-    Module<B>: GLWESecretFamily<B>
-        + VecZnxEncodeCoeffsi64
+    Module<B>: VecZnxEncodeCoeffsi64
         + VecZnxFillUniform
         + VecZnxAddNormal
         + VecZnxNormalizeInplace<B>
-        + GLWESecretFamily<B>
         + GGSWEncryptSkFamily<B>
         + VecZnxAddScalarInplace
         + AutomorphismKeyEncryptSkFamily<B>
@@ -52,7 +55,9 @@ where
         + CGGICircuitBootstrapFamily<B>
         + GLWEDecryptFamily<B>
         + GGSWAssertNoiseFamily<B>
-        + VecZnxStd,
+        + VecZnxStd
+        + VmpPMatAlloc<B>
+        + VmpPMatPrepare<B>,
     B: ScratchOwnedAllocImpl<B>
         + ScratchOwnedBorrowImpl<B>
         + TakeVecZnxDftImpl<B>
@@ -202,12 +207,10 @@ fn test_to_constant() {
 
 fn to_constant<B: Backend>(module: &Module<B>)
 where
-    Module<B>: GLWESecretFamily<B>
-        + VecZnxEncodeCoeffsi64
+    Module<B>: VecZnxEncodeCoeffsi64
         + VecZnxFillUniform
         + VecZnxAddNormal
         + VecZnxNormalizeInplace<B>
-        + GLWESecretFamily<B>
         + GGSWEncryptSkFamily<B>
         + VecZnxAddScalarInplace
         + AutomorphismKeyEncryptSkFamily<B>
@@ -218,7 +221,9 @@ where
         + CGGICircuitBootstrapFamily<B>
         + GLWEDecryptFamily<B>
         + GGSWAssertNoiseFamily<B>
-        + VecZnxStd,
+        + VecZnxStd
+        + VmpPMatAlloc<B>
+        + VmpPMatPrepare<B>,
     B: ScratchOwnedAllocImpl<B>
         + ScratchOwnedBorrowImpl<B>
         + TakeVecZnxDftImpl<B>

core/benches/external_product_glwe_fft64.rs

@@ -1,4 +1,4 @@
-use core::{GGSWCiphertext, GGSWCiphertextExec, GLWECiphertext, GLWESecret, GLWESecretExec, Infos};
+use core::layouts::{prepared::{GGSWCiphertextExec, GLWESecretExec}, GGSWCiphertext, GLWECiphertext, GLWESecret, Infos};
 use std::hint::black_box;
 
 use backend::{

core/benches/keyswitch_glwe_fft64.rs

@@ -1,7 +1,4 @@
-use core::{
-    AutomorphismKey, AutomorphismKeyExec, GLWECiphertext, GLWESecret, GLWESecretExec, GLWESwitchingKey, GLWESwitchingKeyExec,
-    Infos,
-};
+use core::layouts::{prepared::{GGLWEAutomorphismKeyExec, GGLWESwitchingKeyExec, GLWESecretExec}, GGLWEAutomorphismKey, GGLWESwitchingKey, GLWECiphertext, GLWESecret, Infos};
 use std::{hint::black_box, time::Duration};
 
 use backend::{
@@ -43,12 +40,12 @@ fn bench_keyswitch_glwe_fft64(c: &mut Criterion) {
         let rows: usize = p.k_ct_in.div_ceil(p.basek * digits);
         let sigma: f64 = 3.2;
 
-        let mut ksk: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_grlwe, rows, digits, rank_out);
+        let mut ksk: GGLWEAutomorphismKey<Vec<u8>> = GGLWEAutomorphismKey::alloc(n, basek, k_grlwe, rows, digits, rank_out);
         let mut ct_in: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_rlwe_in, rank_in);
         let mut ct_out: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_rlwe_out, rank_out);
 
         let mut scratch: ScratchOwned<FFT64> = ScratchOwned::alloc(
-            GLWESwitchingKey::encrypt_sk_scratch_space(&module, n, basek, ksk.k(), rank_in, rank_out)
+            GGLWESwitchingKey::encrypt_sk_scratch_space(&module, n, basek, ksk.k(), rank_in, rank_out)
                 | GLWECiphertext::encrypt_sk_scratch_space(&module, n, basek, ct_in.k())
                 | GLWECiphertext::keyswitch_scratch_space(
                     &module,
@@ -93,7 +90,7 @@ fn bench_keyswitch_glwe_fft64(c: &mut Criterion) {
             scratch.borrow(),
         );
 
-        let ksk_exec: AutomorphismKeyExec<Vec<u8>, _> = AutomorphismKeyExec::from(&module, &ksk, scratch.borrow());
+        let ksk_exec: GGLWEAutomorphismKeyExec<Vec<u8>, _> = GGLWEAutomorphismKeyExec::from(&module, &ksk, scratch.borrow());
 
         move || {
             black_box(ct_out.automorphism(&module, &ct_in, &ksk_exec, scratch.borrow()));
@@ -149,11 +146,11 @@ fn bench_keyswitch_glwe_inplace_fft64(c: &mut Criterion) {
         let rows: usize = p.k_ct.div_ceil(p.basek);
         let sigma: f64 = 3.2;
 
-        let mut ksk: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank, rank);
+        let mut ksk: GGLWESwitchingKey<Vec<u8>> = GGLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank, rank);
         let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_ct, rank);
 
         let mut scratch: ScratchOwned<FFT64> = ScratchOwned::alloc(
-            GLWESwitchingKey::encrypt_sk_scratch_space(&module, n, basek, ksk.k(), rank, rank)
+            GGLWESwitchingKey::encrypt_sk_scratch_space(&module, n, basek, ksk.k(), rank, rank)
                 | GLWECiphertext::encrypt_sk_scratch_space(&module, n, basek, ct.k())
                 | GLWECiphertext::keyswitch_inplace_scratch_space(&module, n, basek, ct.k(), ksk.k(), digits, rank),
         );
@@ -188,7 +185,7 @@ fn bench_keyswitch_glwe_inplace_fft64(c: &mut Criterion) {
             scratch.borrow(),
         );
 
-        let ksk_exec: GLWESwitchingKeyExec<Vec<u8>, FFT64> = GLWESwitchingKeyExec::from(&module, &ksk, scratch.borrow());
+        let ksk_exec: GGLWESwitchingKeyExec<Vec<u8>, FFT64> = GGLWESwitchingKeyExec::from(&module, &ksk, scratch.borrow());
 
         move || {
             black_box(ct.keyswitch_inplace(&module, &ksk_exec, scratch.borrow()));

core/src/automorphism/gglwe_atk.rs

@@ -3,9 +3,12 @@ use backend::hal::{
     layouts::{Backend, DataMut, DataRef, Module, Scratch},
 };
 
-use crate::{AutomorphismKey, AutomorphismKeyExec, GLWECiphertext, GLWEKeyswitchFamily, Infos};
+use crate::{
+    layouts::{GGLWEAutomorphismKey, GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyExec},
+    trait_families::GLWEKeyswitchFamily,
+};
 
-impl AutomorphismKey<Vec<u8>> {
+impl GGLWEAutomorphismKey<Vec<u8>> {
     pub fn automorphism_scratch_space<B: Backend>(
         module: &Module<B>,
         n: usize,
@@ -34,16 +37,16 @@ impl AutomorphismKey<Vec<u8>> {
     where
         Module<B>: GLWEKeyswitchFamily<B>,
     {
-        AutomorphismKey::automorphism_scratch_space(module, n, basek, k_out, k_out, k_ksk, digits, rank)
+        GGLWEAutomorphismKey::automorphism_scratch_space(module, n, basek, k_out, k_out, k_ksk, digits, rank)
     }
 }
 
-impl<DataSelf: DataMut> AutomorphismKey<DataSelf> {
+impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
     pub fn automorphism<'a, DataLhs: DataRef, DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        lhs: &AutomorphismKey<DataLhs>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        lhs: &GGLWEAutomorphismKey<DataLhs>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxAutomorphism + VecZnxAutomorphismInplace,
@@ -117,14 +120,14 @@ impl<DataSelf: DataMut> AutomorphismKey<DataSelf> {
     pub fn automorphism_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxAutomorphism + VecZnxAutomorphismInplace,
         Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable,
     {
         unsafe {
-            let self_ptr: *mut AutomorphismKey<DataSelf> = self as *mut AutomorphismKey<DataSelf>;
+            let self_ptr: *mut GGLWEAutomorphismKey<DataSelf> = self as *mut GGLWEAutomorphismKey<DataSelf>;
             self.automorphism(&module, &*self_ptr, rhs, scratch);
         }
     }

core/src/automorphism/ggsw_ct.rs

@@ -4,7 +4,11 @@ use backend::hal::{
 };
 
 use crate::{
-    AutomorphismKeyExec, GGSWCiphertext, GGSWKeySwitchFamily, GLWECiphertext, GLWEKeyswitchFamily, GLWETensorKeyExec, Infos,
+    layouts::{
+        GGSWCiphertext, GLWECiphertext, Infos,
+        prepared::{GGLWEAutomorphismKeyExec, GGLWETensorKeyExec},
+    },
+    trait_families::{GGSWKeySwitchFamily, GLWEKeyswitchFamily},
 };
 
 impl GGSWCiphertext<Vec<u8>> {
@@ -56,8 +60,8 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        auto_key: &AutomorphismKeyExec<DataAk, B>,
-        tensor_key: &GLWETensorKeyExec<DataTsk, B>,
+        auto_key: &GGLWEAutomorphismKeyExec<DataAk, B>,
+        tensor_key: &GGLWETensorKeyExec<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxAutomorphismInplace + VecZnxNormalizeTmpBytes,
@@ -65,8 +69,6 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     {
         #[cfg(debug_assertions)]
         {
-            use crate::Infos;
-
             assert_eq!(self.n(), auto_key.n());
             assert_eq!(lhs.n(), auto_key.n());
 
@@ -115,8 +117,8 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     pub fn automorphism_inplace<DataKsk: DataRef, DataTsk: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        auto_key: &AutomorphismKeyExec<DataKsk, B>,
-        tensor_key: &GLWETensorKeyExec<DataTsk, B>,
+        auto_key: &GGLWEAutomorphismKeyExec<DataKsk, B>,
+        tensor_key: &GGLWETensorKeyExec<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxAutomorphismInplace + VecZnxNormalizeTmpBytes,
@@ -132,7 +134,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        auto_key: &AutomorphismKeyExec<DataAk, B>,
+        auto_key: &GGLWEAutomorphismKeyExec<DataAk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxAutomorphismInplace + VecZnxNormalizeTmpBytes,

core/src/automorphism/glwe_ct.rs

@@ -6,7 +6,10 @@ use backend::hal::{
     layouts::{Backend, DataMut, DataRef, Module, Scratch, VecZnxBig},
 };
 
-use crate::{AutomorphismKeyExec, GLWECiphertext, GLWEKeyswitchFamily, Infos, glwe::keyswitch::keyswitch};
+use crate::{
+    layouts::{GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyExec},
+    trait_families::GLWEKeyswitchFamily,
+};
 
 impl GLWECiphertext<Vec<u8>> {
     pub fn automorphism_scratch_space<B: Backend>(
@@ -46,7 +49,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxAutomorphismInplace,
@@ -61,7 +64,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn automorphism_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxAutomorphismInplace,
@@ -77,7 +80,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B>,
@@ -88,7 +91,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
             self.assert_keyswitch(module, lhs, &rhs.key, scratch);
         }
         let (res_dft, scratch1) = scratch.take_vec_znx_dft(self.n(), self.cols(), rhs.size()); // TODO: optimise size
-        let mut res_big: VecZnxBig<_, B> = keyswitch(module, res_dft, lhs, &rhs.key, scratch1);
+        let mut res_big: VecZnxBig<_, B> = lhs.keyswitch_internal(module, res_dft, &rhs.key, scratch1);
         (0..self.cols()).for_each(|i| {
             module.vec_znx_big_automorphism_inplace(rhs.p(), &mut res_big, i);
             module.vec_znx_big_add_small_inplace(&mut res_big, i, &lhs.data, i);
@@ -99,7 +102,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn automorphism_add_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B>,
@@ -115,7 +118,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B> + VecZnxBigSubSmallAInplace<B>,
@@ -126,7 +129,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
             self.assert_keyswitch(module, lhs, &rhs.key, scratch);
         }
         let (res_dft, scratch1) = scratch.take_vec_znx_dft(self.n(), self.cols(), rhs.size()); // TODO: optimise size
-        let mut res_big: VecZnxBig<_, B> = keyswitch(module, res_dft, lhs, &rhs.key, scratch1);
+        let mut res_big: VecZnxBig<_, B> = lhs.keyswitch_internal(module, res_dft, &rhs.key, scratch1);
         (0..self.cols()).for_each(|i| {
             module.vec_znx_big_automorphism_inplace(rhs.p(), &mut res_big, i);
             module.vec_znx_big_sub_small_a_inplace(&mut res_big, i, &lhs.data, i);
@@ -137,7 +140,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn automorphism_sub_ab_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B> + VecZnxBigSubSmallAInplace<B>,
@@ -153,7 +156,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B> + VecZnxBigSubSmallBInplace<B>,
@@ -164,7 +167,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
             self.assert_keyswitch(module, lhs, &rhs.key, scratch);
         }
         let (res_dft, scratch1) = scratch.take_vec_znx_dft(self.n(), self.cols(), rhs.size()); // TODO: optimise size
-        let mut res_big: VecZnxBig<_, B> = keyswitch(module, res_dft, lhs, &rhs.key, scratch1);
+        let mut res_big: VecZnxBig<_, B> = lhs.keyswitch_internal(module, res_dft, &rhs.key, scratch1);
         (0..self.cols()).for_each(|i| {
             module.vec_znx_big_automorphism_inplace(rhs.p(), &mut res_big, i);
             module.vec_znx_big_sub_small_b_inplace(&mut res_big, i, &lhs.data, i);
@@ -175,7 +178,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn automorphism_sub_ba_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B> + VecZnxBigSubSmallBInplace<B>,

core/src/automorphism/mod.rs

@@ -0,0 +1,3 @@
+mod gglwe_atk;
+mod ggsw_ct;
+mod glwe_ct;

core/src/conversion/glwe_to_lwe.rs

@@ -0,0 +1,70 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeVecZnx, TakeVecZnxDft, ZnxView, ZnxViewMut, ZnxZero},
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+
+use crate::{
+    TakeGLWECt,
+    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::GLWEToLWESwitchingKeyExec},
+};
+
+use crate::trait_families::GLWEKeyswitchFamily;
+
+impl LWECiphertext<Vec<u8>> {
+    pub fn from_glwe_scratch_space<B: Backend>(
+        module: &Module<B>,
+        n: usize,
+        basek: usize,
+        k_lwe: usize,
+        k_glwe: usize,
+        k_ksk: usize,
+        rank: usize,
+    ) -> usize
+    where
+        Module<B>: GLWEKeyswitchFamily<B>,
+    {
+        GLWECiphertext::bytes_of(n, basek, k_lwe, 1)
+            + GLWECiphertext::keyswitch_scratch_space(module, n, basek, k_lwe, k_glwe, k_ksk, 1, rank, 1)
+    }
+}
+
+impl<DLwe: DataMut> LWECiphertext<DLwe> {
+    pub fn sample_extract<DGlwe: DataRef>(&mut self, a: &GLWECiphertext<DGlwe>) {
+        #[cfg(debug_assertions)]
+        {
+            assert!(self.n() <= a.n());
+        }
+
+        let min_size: usize = self.size().min(a.size());
+        let n: usize = self.n();
+
+        self.data.zero();
+        (0..min_size).for_each(|i| {
+            let data_lwe: &mut [i64] = self.data.at_mut(0, i);
+            data_lwe[0] = a.data.at(0, i)[0];
+            data_lwe[1..].copy_from_slice(&a.data.at(1, i)[..n]);
+        });
+    }
+
+    pub fn from_glwe<DGlwe, DKs, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        a: &GLWECiphertext<DGlwe>,
+        ks: &GLWEToLWESwitchingKeyExec<DKs, B>,
+        scratch: &mut Scratch<B>,
+    ) where
+        DGlwe: DataRef,
+        DKs: DataRef,
+        Module<B>: GLWEKeyswitchFamily<B>,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(self.basek(), a.basek());
+            assert_eq!(a.n(), ks.n());
+        }
+        let (mut tmp_glwe, scratch1) = scratch.take_glwe_ct(a.n(), a.basek(), self.k(), 1);
+        tmp_glwe.keyswitch(module, a, &ks.0, scratch1);
+        self.sample_extract(&tmp_glwe);
+    }
+}

core/src/conversion/lwe_to_glwe.rs

@@ -0,0 +1,63 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeVecZnx, TakeVecZnxDft, ZnxView, ZnxViewMut, ZnxZero},
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+
+use crate::{
+    TakeGLWECt,
+    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::LWEToGLWESwitchingKeyExec},
+};
+
+use crate::trait_families::GLWEKeyswitchFamily;
+
+impl GLWECiphertext<Vec<u8>> {
+    pub fn from_lwe_scratch_space<B: Backend>(
+        module: &Module<B>,
+        n: usize,
+        basek: usize,
+        k_lwe: usize,
+        k_glwe: usize,
+        k_ksk: usize,
+        rank: usize,
+    ) -> usize
+    where
+        Module<B>: GLWEKeyswitchFamily<B>,
+    {
+        GLWECiphertext::keyswitch_scratch_space(module, n, basek, k_glwe, k_lwe, k_ksk, 1, 1, rank)
+            + GLWECiphertext::bytes_of(n, basek, k_lwe, 1)
+    }
+}
+
+impl<D: DataMut> GLWECiphertext<D> {
+    pub fn from_lwe<DLwe, DKsk, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        lwe: &LWECiphertext<DLwe>,
+        ksk: &LWEToGLWESwitchingKeyExec<DKsk, B>,
+        scratch: &mut Scratch<B>,
+    ) where
+        DLwe: DataRef,
+        DKsk: DataRef,
+        Module<B>: GLWEKeyswitchFamily<B>,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert!(lwe.n() <= self.n());
+            assert_eq!(self.basek(), self.basek());
+        }
+
+        let (mut glwe, scratch1) = scratch.take_glwe_ct(ksk.n(), lwe.basek(), lwe.k(), 1);
+        glwe.data.zero();
+
+        let n_lwe: usize = lwe.n();
+
+        (0..lwe.size()).for_each(|i| {
+            let data_lwe: &[i64] = lwe.data.at(0, i);
+            glwe.data.at_mut(0, i)[0] = data_lwe[0];
+            glwe.data.at_mut(1, i)[..n_lwe].copy_from_slice(&data_lwe[1..]);
+        });
+
+        self.keyswitch(module, &glwe, &ksk.0, scratch1);
+    }
+}

core/src/conversion/mod.rs

@@ -0,0 +1,2 @@
+mod glwe_to_lwe;
+mod lwe_to_glwe;

core/src/decryption/glwe_ct.rs

@@ -1,23 +1,15 @@
 use backend::hal::{
     api::{
         DataViewMut, SvpApplyInplace, TakeVecZnxBig, TakeVecZnxDft, VecZnxBigAddInplace, VecZnxBigAddSmallInplace,
-        VecZnxBigAllocBytes, VecZnxBigNormalize, VecZnxDftAllocBytes, VecZnxDftFromVecZnx, VecZnxDftToVecZnxBigConsume,
-        VecZnxNormalizeTmpBytes,
+        VecZnxBigNormalize, VecZnxDftAllocBytes, VecZnxDftFromVecZnx, VecZnxDftToVecZnxBigConsume, VecZnxNormalizeTmpBytes,
     },
     layouts::{Backend, DataMut, DataRef, Module, Scratch},
 };
 
-use crate::{GLWECiphertext, GLWEPlaintext, GLWESecretExec, Infos};
-
-pub trait GLWEDecryptFamily<B: Backend> = VecZnxDftAllocBytes
-    + VecZnxBigAllocBytes
-    + VecZnxDftFromVecZnx<B>
-    + SvpApplyInplace<B>
-    + VecZnxDftToVecZnxBigConsume<B>
-    + VecZnxBigAddInplace<B>
-    + VecZnxBigAddSmallInplace<B>
-    + VecZnxBigNormalize<B>
-    + VecZnxNormalizeTmpBytes;
+use crate::{
+    layouts::{GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretExec},
+    trait_families::GLWEDecryptFamily,
+};
 
 impl GLWECiphertext<Vec<u8>> {
     pub fn decrypt_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize

core/src/decryption/lwe_ct.rs

@@ -4,7 +4,7 @@ use backend::hal::{
     oep::{ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl},
 };
 
-use crate::{Infos, LWECiphertext, LWESecret, SetMetaData, lwe::LWEPlaintext};
+use crate::layouts::{Infos, LWECiphertext, LWEPlaintext, LWESecret, SetMetaData};
 
 impl<DataSelf> LWECiphertext<DataSelf>
 where

core/src/decryption/mod.rs

@@ -0,0 +1,2 @@
+mod glwe_ct;
+mod lwe_ct;

core/src/encryption/compressed/gglwe_atk.rs

@@ -0,0 +1,88 @@
+use backend::hal::{
+    api::{
+        ScratchAvailable, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxAutomorphism,
+        VecZnxSwithcDegree,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecret, TakeGLWESecretExec,
+    layouts::{
+        GLWESecret, Infos,
+        compressed::{GGLWEAutomorphismKeyCompressed, GGLWESwitchingKeyCompressed},
+    },
+};
+
+use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl GGLWEAutomorphismKeyCompressed<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
+    where
+        Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        GGLWESwitchingKeyCompressed::encrypt_sk_scratch_space(module, n, basek, k, rank, rank) + GLWESecret::bytes_of(n, rank)
+    }
+}
+
+impl<DataSelf: DataMut> GGLWEAutomorphismKeyCompressed<DataSelf> {
+    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        p: i64,
+        sk: &GLWESecret<DataSk>,
+        seed_xa: [u8; 32],
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B>
+            + VecZnxSwithcDegree
+            + VecZnxAutomorphism
+            + VecZnxAddScalarInplace
+            + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(self.n(), sk.n());
+            assert_eq!(self.rank_out(), self.rank_in());
+            assert_eq!(sk.rank(), self.rank());
+            assert!(
+                scratch.available()
+                    >= GGLWEAutomorphismKeyCompressed::encrypt_sk_scratch_space(
+                        module,
+                        sk.n(),
+                        self.basek(),
+                        self.k(),
+                        self.rank()
+                    ),
+                "scratch.available(): {} < AutomorphismKey::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
+                scratch.available(),
+                self.rank(),
+                self.size(),
+                GGLWEAutomorphismKeyCompressed::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank())
+            )
+        }
+
+        let (mut sk_out, scratch_1) = scratch.take_glwe_secret(sk.n(), sk.rank());
+
+        {
+            (0..self.rank()).for_each(|i| {
+                module.vec_znx_automorphism(
+                    module.galois_element_inv(p),
+                    &mut sk_out.data.as_vec_znx_mut(),
+                    i,
+                    &sk.data.as_vec_znx(),
+                    i,
+                );
+            });
+        }
+
+        self.key
+            .encrypt_sk(module, &sk, &sk_out, seed_xa, source_xe, sigma, scratch_1);
+
+        self.p = p;
+    }
+}

core/src/encryption/compressed/gglwe_ct.rs

@@ -0,0 +1,121 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxNormalizeInplace, ZnxZero},
+    layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWEPt,
+    encryption::glwe_encrypt_sk_internal,
+    layouts::{GGLWECiphertext, Infos, compressed::GGLWECiphertextCompressed, prepared::GLWESecretExec},
+};
+
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily};
+
+impl GGLWECiphertextCompressed<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
+    where
+        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B>,
+    {
+        GGLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k)
+    }
+}
+
+impl<D: DataMut> GGLWECiphertextCompressed<D> {
+    pub fn encrypt_sk<DataPt: DataRef, DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        pt: &ScalarZnx<DataPt>,
+        sk: &GLWESecretExec<DataSk, B>,
+        seed: [u8; 32],
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GGLWEEncryptSkFamily<B> + VecZnxAddScalarInplace,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            use backend::hal::api::ZnxInfos;
+
+            assert_eq!(
+                self.rank_in(),
+                pt.cols(),
+                "self.rank_in(): {} != pt.cols(): {}",
+                self.rank_in(),
+                pt.cols()
+            );
+            assert_eq!(
+                self.rank_out(),
+                sk.rank(),
+                "self.rank_out(): {} != sk.rank(): {}",
+                self.rank_out(),
+                sk.rank()
+            );
+            assert_eq!(self.n(), sk.n());
+            assert_eq!(pt.n(), sk.n());
+            assert!(
+                scratch.available()
+                    >= GGLWECiphertextCompressed::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k()),
+                "scratch.available: {} < GGLWECiphertext::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
+                scratch.available(),
+                self.rank(),
+                self.size(),
+                GGLWECiphertextCompressed::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k())
+            );
+            assert!(
+                self.rows() * self.digits() * self.basek() <= self.k(),
+                "self.rows() : {} * self.digits() : {} * self.basek() : {} = {} >= self.k() = {}",
+                self.rows(),
+                self.digits(),
+                self.basek(),
+                self.rows() * self.digits() * self.basek(),
+                self.k()
+            );
+        }
+
+        let rows: usize = self.rows();
+        let digits: usize = self.digits();
+        let basek: usize = self.basek();
+        let k: usize = self.k();
+        let rank_in: usize = self.rank_in();
+        let cols: usize = self.rank_out() + 1;
+
+        let mut source_xa = Source::new(seed);
+
+        let (mut tmp_pt, scrach_1) = scratch.take_glwe_pt(sk.n(), basek, k);
+        (0..rank_in).for_each(|col_i| {
+            (0..rows).for_each(|row_i| {
+                // Adds the scalar_znx_pt to the i-th limb of the vec_znx_pt
+                tmp_pt.data.zero(); // zeroes for next iteration
+                module.vec_znx_add_scalar_inplace(
+                    &mut tmp_pt.data,
+                    0,
+                    (digits - 1) + row_i * digits,
+                    pt,
+                    col_i,
+                );
+                module.vec_znx_normalize_inplace(basek, &mut tmp_pt.data, 0, scrach_1);
+
+                let (seed, mut source_xa_tmp) = source_xa.branch();
+                self.seed[col_i * rows + row_i] = seed;
+
+                glwe_encrypt_sk_internal(
+                    module,
+                    self.basek(),
+                    self.k(),
+                    &mut self.at_mut(row_i, col_i).data,
+                    cols,
+                    true,
+                    Some((&tmp_pt, 0)),
+                    sk,
+                    &mut source_xa_tmp,
+                    source_xe,
+                    sigma,
+                    scrach_1,
+                );
+            });
+        });
+    }
+}

core/src/encryption/compressed/gglwe_ksk.rs

@@ -0,0 +1,109 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxSwithcDegree},
+    layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecretExec,
+    layouts::{
+        GGLWECiphertext, GLWESecret, GGLWESwitchingKey, Infos, compressed::GGLWESwitchingKeyCompressed, prepared::GLWESecretExec,
+    },
+};
+
+use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl GGLWESwitchingKeyCompressed<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(
+        module: &Module<B>,
+        n: usize,
+        basek: usize,
+        k: usize,
+        rank_in: usize,
+        rank_out: usize,
+    ) -> usize
+    where
+        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        (GGLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k) | ScalarZnx::alloc_bytes(n, 1))
+            + ScalarZnx::alloc_bytes(n, rank_in)
+            + GLWESecretExec::bytes_of(module, n, rank_out)
+    }
+}
+
+impl<DataSelf: DataMut> GGLWESwitchingKeyCompressed<DataSelf> {
+    pub fn encrypt_sk<DataSkIn: DataRef, DataSkOut: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        sk_in: &GLWESecret<DataSkIn>,
+        sk_out: &GLWESecret<DataSkOut>,
+        seed_xa: [u8; 32],
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>:
+            GGLWESwitchingKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + ScratchAvailable + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert!(sk_in.n() <= module.n());
+            assert!(sk_out.n() <= module.n());
+            assert!(
+                scratch.available()
+                    >= GGLWESwitchingKey::encrypt_sk_scratch_space(
+                        module,
+                        sk_out.n(),
+                        self.basek(),
+                        self.k(),
+                        self.rank_in(),
+                        self.rank_out()
+                    ),
+                "scratch.available()={} < GLWESwitchingKey::encrypt_sk_scratch_space={}",
+                scratch.available(),
+                GGLWESwitchingKey::encrypt_sk_scratch_space(
+                    module,
+                    sk_out.n(),
+                    self.basek(),
+                    self.k(),
+                    self.rank_in(),
+                    self.rank_out()
+                )
+            )
+        }
+
+        let n: usize = sk_in.n().max(sk_out.n());
+
+        let (mut sk_in_tmp, scratch1) = scratch.take_scalar_znx(n, sk_in.rank());
+        (0..sk_in.rank()).for_each(|i| {
+            module.vec_znx_switch_degree(
+                &mut sk_in_tmp.as_vec_znx_mut(),
+                i,
+                &sk_in.data.as_vec_znx(),
+                i,
+            );
+        });
+
+        let (mut sk_out_tmp, scratch2) = scratch1.take_glwe_secret_exec(n, sk_out.rank());
+        {
+            let (mut tmp, _) = scratch2.take_scalar_znx(n, 1);
+            (0..sk_out.rank()).for_each(|i| {
+                module.vec_znx_switch_degree(&mut tmp.as_vec_znx_mut(), 0, &sk_out.data.as_vec_znx(), i);
+                module.svp_prepare(&mut sk_out_tmp.data, i, &tmp, 0);
+            });
+        }
+
+        self.key.encrypt_sk(
+            module,
+            &sk_in_tmp,
+            &sk_out_tmp,
+            seed_xa,
+            source_xe,
+            sigma,
+            scratch2,
+        );
+        self.sk_in_n = sk_in.n();
+        self.sk_out_n = sk_out.n();
+    }
+}

core/src/encryption/compressed/gglwe_tsk.rs

@@ -0,0 +1,85 @@
+use backend::hal::{
+    api::{
+        ScratchAvailable, SvpApply, TakeScalarZnx, TakeVecZnx, TakeVecZnxBig, TakeVecZnxDft, VecZnxAddScalarInplace,
+        VecZnxDftToVecZnxBigTmpA, VecZnxSwithcDegree,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecret, TakeGLWESecretExec,
+    layouts::{GGLWETensorKey, GLWESecret, Infos, compressed::GGLWETensorKeyCompressed},
+    trait_families::GLWEDecryptFamily,
+};
+
+use crate::trait_families::{GGLWETensorKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl GGLWETensorKeyCompressed<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
+    where
+        Module<B>: GGLWETensorKeyEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        GGLWETensorKey::encrypt_sk_scratch_space(module, n, basek, k, rank)
+    }
+}
+
+impl<DataSelf: DataMut> GGLWETensorKeyCompressed<DataSelf> {
+    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        sk: &GLWESecret<DataSk>,
+        seed_xa: [u8; 32],
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GGLWETensorKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeVecZnxDft<B> + TakeVecZnxBig<B> + TakeGLWESecretExec<B> + TakeScalarZnx + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(self.rank(), sk.rank());
+            assert_eq!(self.n(), sk.n());
+        }
+
+        let n: usize = sk.n();
+        let rank: usize = self.rank();
+
+        let (mut sk_dft_prep, scratch1) = scratch.take_glwe_secret_exec(n, rank);
+        sk_dft_prep.prepare(module, &sk);
+
+        let (mut sk_dft, scratch2) = scratch1.take_vec_znx_dft(n, rank, 1);
+
+        (0..rank).for_each(|i| {
+            module.vec_znx_dft_from_vec_znx(1, 0, &mut sk_dft, i, &sk.data.as_vec_znx(), i);
+        });
+
+        let (mut sk_ij_big, scratch3) = scratch2.take_vec_znx_big(n, 1, 1);
+        let (mut sk_ij, scratch4) = scratch3.take_glwe_secret(n, 1);
+        let (mut sk_ij_dft, scratch5) = scratch4.take_vec_znx_dft(n, 1, 1);
+
+        let mut source_xa: Source = Source::new(seed_xa);
+
+        (0..rank).for_each(|i| {
+            (i..rank).for_each(|j| {
+                module.svp_apply(&mut sk_ij_dft, 0, &sk_dft_prep.data, j, &sk_dft, i);
+
+                module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut sk_ij_big, 0, &mut sk_ij_dft, 0);
+                module.vec_znx_big_normalize(
+                    self.basek(),
+                    &mut sk_ij.data.as_vec_znx_mut(),
+                    0,
+                    &sk_ij_big,
+                    0,
+                    scratch5,
+                );
+
+                let (seed_xa_tmp, _) = source_xa.branch();
+
+                self.at_mut(i, j)
+                    .encrypt_sk(module, &sk_ij, sk, seed_xa_tmp, source_xe, sigma, scratch5);
+            });
+        })
+    }
+}

core/src/encryption/compressed/ggsw_ct.rs

@@ -1,82 +1,16 @@
 use backend::hal::{
     api::{ScratchAvailable, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxNormalizeInplace, ZnxZero},
-    layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch, VecZnx},
+    layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch},
 };
 use sampling::source::Source;
 
 use crate::{
-    GGLWEEncryptSkFamily, GGSWCiphertext, GGSWCiphertextCompressed, GLWECiphertext, GLWEEncryptSkFamily, GLWESecretExec, Infos,
-    TakeGLWEPt, encrypt_sk_internal,
+    TakeGLWEPt,
+    encryption::glwe_encrypt_sk_internal,
+    layouts::{GGSWCiphertext, Infos, compressed::GGSWCiphertextCompressed, prepared::GLWESecretExec},
 };
 
-pub trait GGSWEncryptSkFamily<B: Backend> = GLWEEncryptSkFamily<B>;
-
-impl GGSWCiphertext<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: GGSWEncryptSkFamily<B>,
-    {
-        let size = k.div_ceil(basek);
-        GLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k)
-            + VecZnx::alloc_bytes(n, rank + 1, size)
-            + VecZnx::alloc_bytes(n, 1, size)
-            + module.vec_znx_dft_alloc_bytes(n, rank + 1, size)
-    }
-}
-
-impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
-    pub fn encrypt_sk<DataPt: DataRef, DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        pt: &ScalarZnx<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
-        source_xa: &mut Source,
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GGSWEncryptSkFamily<B> + VecZnxAddScalarInplace,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            use backend::hal::api::ZnxInfos;
-
-            assert_eq!(self.rank(), sk.rank());
-            assert_eq!(self.n(), sk.n());
-            assert_eq!(pt.n(), sk.n());
-        }
-
-        let basek: usize = self.basek();
-        let k: usize = self.k();
-        let rank: usize = self.rank();
-        let digits: usize = self.digits();
-
-        let (mut tmp_pt, scratch1) = scratch.take_glwe_pt(self.n(), basek, k);
-
-        (0..self.rows()).for_each(|row_i| {
-            tmp_pt.data.zero();
-
-            // Adds the scalar_znx_pt to the i-th limb of the vec_znx_pt
-            module.vec_znx_add_scalar_inplace(&mut tmp_pt.data, 0, (digits - 1) + row_i * digits, pt, 0);
-            module.vec_znx_normalize_inplace(basek, &mut tmp_pt.data, 0, scratch1);
-
-            (0..rank + 1).for_each(|col_j| {
-                // rlwe encrypt of vec_znx_pt into vec_znx_ct
-
-                self.at_mut(row_i, col_j).encrypt_sk_internal(
-                    module,
-                    Some((&tmp_pt, col_j)),
-                    sk,
-                    source_xa,
-                    source_xe,
-                    sigma,
-                    scratch1,
-                );
-            });
-        });
-    }
-}
+use crate::trait_families::GGSWEncryptSkFamily;
 
 impl GGSWCiphertextCompressed<Vec<u8>> {
     pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
@@ -136,7 +70,7 @@ impl<DataSelf: DataMut> GGSWCiphertextCompressed<DataSelf> {
 
                 self.seed[row_i * cols + col_j] = seed;
 
-                encrypt_sk_internal(
+                glwe_encrypt_sk_internal(
                     module,
                     self.basek(),
                     self.k(),

core/src/encryption/compressed/glwe_ct.rs

@@ -0,0 +1,79 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeVecZnx, TakeVecZnxDft},
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    encryption::glwe_ct::glwe_encrypt_sk_internal,
+    layouts::{GLWECiphertext, GLWEPlaintext, Infos, compressed::GLWECiphertextCompressed, prepared::GLWESecretExec},
+};
+
+use crate::trait_families::GLWEEncryptSkFamily;
+
+impl GLWECiphertextCompressed<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
+    where
+        Module<B>: GLWEEncryptSkFamily<B>,
+    {
+        GLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k)
+    }
+}
+
+impl<D: DataMut> GLWECiphertextCompressed<D> {
+    pub fn encrypt_sk<DataPt: DataRef, DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        pt: &GLWEPlaintext<DataPt>,
+        sk: &GLWESecretExec<DataSk, B>,
+        seed_xa: [u8; 32],
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GLWEEncryptSkFamily<B>,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
+    {
+        self.encrypt_sk_internal(
+            module,
+            Some((pt, 0)),
+            sk,
+            seed_xa,
+            source_xe,
+            sigma,
+            scratch,
+        );
+    }
+
+    pub(crate) fn encrypt_sk_internal<DataPt: DataRef, DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        pt: Option<(&GLWEPlaintext<DataPt>, usize)>,
+        sk: &GLWESecretExec<DataSk, B>,
+        seed_xa: [u8; 32],
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GLWEEncryptSkFamily<B>,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
+    {
+        let mut source_xa = Source::new(seed_xa);
+        let cols: usize = self.rank() + 1;
+        glwe_encrypt_sk_internal(
+            module,
+            self.basek(),
+            self.k(),
+            &mut self.data,
+            cols,
+            true,
+            pt,
+            sk,
+            &mut source_xa,
+            source_xe,
+            sigma,
+            scratch,
+        );
+        self.seed = seed_xa;
+    }
+}

core/src/encryption/compressed/mod.rs

@@ -0,0 +1,6 @@
+mod gglwe_atk;
+mod gglwe_ct;
+mod gglwe_ksk;
+mod gglwe_tsk;
+mod ggsw_ct;
+mod glwe_ct;

core/src/encryption/gglwe_atk.rs

@@ -0,0 +1,83 @@
+use backend::hal::{
+    api::{
+        ScratchAvailable, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxAutomorphism,
+        VecZnxSwithcDegree,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecret, TakeGLWESecretExec,
+    layouts::{GGLWEAutomorphismKey, GLWESecret, GGLWESwitchingKey, Infos},
+};
+
+use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl GGLWEAutomorphismKey<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
+    where
+        Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank, rank) + GLWESecret::bytes_of(n, rank)
+    }
+
+    pub fn encrypt_pk_scratch_space<B: Backend>(module: &Module<B>, _n: usize, _basek: usize, _k: usize, _rank: usize) -> usize {
+        GGLWESwitchingKey::encrypt_pk_scratch_space(module, _n, _basek, _k, _rank, _rank)
+    }
+}
+
+impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
+    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        p: i64,
+        sk: &GLWESecret<DataSk>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B>
+            + VecZnxAutomorphism
+            + VecZnxSwithcDegree
+            + VecZnxAddScalarInplace
+            + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(self.n(), sk.n());
+            assert_eq!(self.rank_out(), self.rank_in());
+            assert_eq!(sk.rank(), self.rank());
+            assert!(
+                scratch.available()
+                    >= GGLWEAutomorphismKey::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank()),
+                "scratch.available(): {} < AutomorphismKey::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
+                scratch.available(),
+                self.rank(),
+                self.size(),
+                GGLWEAutomorphismKey::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank())
+            )
+        }
+
+        let (mut sk_out, scratch_1) = scratch.take_glwe_secret(sk.n(), sk.rank());
+
+        {
+            (0..self.rank()).for_each(|i| {
+                module.vec_znx_automorphism(
+                    module.galois_element_inv(p),
+                    &mut sk_out.data.as_vec_znx_mut(),
+                    i,
+                    &sk.data.as_vec_znx(),
+                    i,
+                );
+            });
+        }
+
+        self.key
+            .encrypt_sk(module, &sk, &sk_out, source_xa, source_xe, sigma, scratch_1);
+
+        self.p = p;
+    }
+}

core/src/encryption/gglwe_ct.rs

@@ -0,0 +1,121 @@
+use backend::hal::{
+    api::{
+        ScratchAvailable, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxNormalizeInplace, VecZnxNormalizeTmpBytes,
+        ZnxZero,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWEPt,
+    layouts::{GGLWECiphertext, GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretExec},
+};
+
+use crate::trait_families::GGLWEEncryptSkFamily;
+
+impl GGLWECiphertext<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
+    where
+        Module<B>: GGLWEEncryptSkFamily<B>,
+    {
+        GLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k)
+            + (GLWEPlaintext::byte_of(n, basek, k) | module.vec_znx_normalize_tmp_bytes(n))
+    }
+
+    pub fn encrypt_pk_scratch_space<B: Backend>(_module: &Module<B>, _n: usize, _basek: usize, _k: usize, _rank: usize) -> usize {
+        unimplemented!()
+    }
+}
+
+impl<DataSelf: DataMut> GGLWECiphertext<DataSelf> {
+    pub fn encrypt_sk<DataPt: DataRef, DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        pt: &ScalarZnx<DataPt>,
+        sk: &GLWESecretExec<DataSk, B>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GGLWEEncryptSkFamily<B> + VecZnxAddScalarInplace,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            use backend::hal::api::ZnxInfos;
+
+            assert_eq!(
+                self.rank_in(),
+                pt.cols(),
+                "self.rank_in(): {} != pt.cols(): {}",
+                self.rank_in(),
+                pt.cols()
+            );
+            assert_eq!(
+                self.rank_out(),
+                sk.rank(),
+                "self.rank_out(): {} != sk.rank(): {}",
+                self.rank_out(),
+                sk.rank()
+            );
+            assert_eq!(self.n(), sk.n());
+            assert_eq!(pt.n(), sk.n());
+            assert!(
+                scratch.available() >= GGLWECiphertext::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k()),
+                "scratch.available: {} < GGLWECiphertext::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
+                scratch.available(),
+                self.rank(),
+                self.size(),
+                GGLWECiphertext::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k())
+            );
+            assert!(
+                self.rows() * self.digits() * self.basek() <= self.k(),
+                "self.rows() : {} * self.digits() : {} * self.basek() : {} = {} >= self.k() = {}",
+                self.rows(),
+                self.digits(),
+                self.basek(),
+                self.rows() * self.digits() * self.basek(),
+                self.k()
+            );
+        }
+
+        let rows: usize = self.rows();
+        let digits: usize = self.digits();
+        let basek: usize = self.basek();
+        let k: usize = self.k();
+        let rank_in: usize = self.rank_in();
+
+        let (mut tmp_pt, scrach_1) = scratch.take_glwe_pt(sk.n(), basek, k);
+        // For each input column (i.e. rank) produces a GGLWE ciphertext of rank_out+1 columns
+        //
+        // Example for ksk rank 2 to rank 3:
+        //
+        // (-(a0*s0 + a1*s1 + a2*s2) + s0', a0, a1, a2)
+        // (-(b0*s0 + b1*s1 + b2*s2) + s0', b0, b1, b2)
+        //
+        // Example ksk rank 2 to rank 1
+        //
+        // (-(a*s) + s0, a)
+        // (-(b*s) + s1, b)
+        (0..rank_in).for_each(|col_i| {
+            (0..rows).for_each(|row_i| {
+                // Adds the scalar_znx_pt to the i-th limb of the vec_znx_pt
+                tmp_pt.data.zero(); // zeroes for next iteration
+                module.vec_znx_add_scalar_inplace(
+                    &mut tmp_pt.data,
+                    0,
+                    (digits - 1) + row_i * digits,
+                    pt,
+                    col_i,
+                );
+                module.vec_znx_normalize_inplace(basek, &mut tmp_pt.data, 0, scrach_1);
+
+                // rlwe encrypt of vec_znx_pt into vec_znx_ct
+                self.at_mut(row_i, col_i)
+                    .encrypt_sk(module, &tmp_pt, sk, source_xa, source_xe, sigma, scrach_1);
+            });
+        });
+    }
+}

core/src/encryption/gglwe_ksk.rs

@@ -0,0 +1,118 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxSwithcDegree},
+    layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecretExec,
+    layouts::{GGLWECiphertext, GLWESecret, GGLWESwitchingKey, Infos, prepared::GLWESecretExec},
+};
+
+use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl GGLWESwitchingKey<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(
+        module: &Module<B>,
+        n: usize,
+        basek: usize,
+        k: usize,
+        rank_in: usize,
+        rank_out: usize,
+    ) -> usize
+    where
+        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        (GGLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k) | ScalarZnx::alloc_bytes(n, 1))
+            + ScalarZnx::alloc_bytes(n, rank_in)
+            + GLWESecretExec::bytes_of(module, n, rank_out)
+    }
+
+    pub fn encrypt_pk_scratch_space<B: Backend>(
+        module: &Module<B>,
+        _n: usize,
+        _basek: usize,
+        _k: usize,
+        _rank_in: usize,
+        _rank_out: usize,
+    ) -> usize {
+        GGLWECiphertext::encrypt_pk_scratch_space(module, _n, _basek, _k, _rank_out)
+    }
+}
+
+impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
+    pub fn encrypt_sk<DataSkIn: DataRef, DataSkOut: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        sk_in: &GLWESecret<DataSkIn>,
+        sk_out: &GLWESecret<DataSkOut>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>:
+            GGLWESwitchingKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + ScratchAvailable + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert!(sk_in.n() <= module.n());
+            assert!(sk_out.n() <= module.n());
+            assert!(
+                scratch.available()
+                    >= GGLWESwitchingKey::encrypt_sk_scratch_space(
+                        module,
+                        sk_out.n(),
+                        self.basek(),
+                        self.k(),
+                        self.rank_in(),
+                        self.rank_out()
+                    ),
+                "scratch.available()={} < GLWESwitchingKey::encrypt_sk_scratch_space={}",
+                scratch.available(),
+                GGLWESwitchingKey::encrypt_sk_scratch_space(
+                    module,
+                    sk_out.n(),
+                    self.basek(),
+                    self.k(),
+                    self.rank_in(),
+                    self.rank_out()
+                )
+            )
+        }
+
+        let n: usize = sk_in.n().max(sk_out.n());
+
+        let (mut sk_in_tmp, scratch1) = scratch.take_scalar_znx(n, sk_in.rank());
+        (0..sk_in.rank()).for_each(|i| {
+            module.vec_znx_switch_degree(
+                &mut sk_in_tmp.as_vec_znx_mut(),
+                i,
+                &sk_in.data.as_vec_znx(),
+                i,
+            );
+        });
+
+        let (mut sk_out_tmp, scratch2) = scratch1.take_glwe_secret_exec(n, sk_out.rank());
+        {
+            let (mut tmp, _) = scratch2.take_scalar_znx(n, 1);
+            (0..sk_out.rank()).for_each(|i| {
+                module.vec_znx_switch_degree(&mut tmp.as_vec_znx_mut(), 0, &sk_out.data.as_vec_znx(), i);
+                module.svp_prepare(&mut sk_out_tmp.data, i, &tmp, 0);
+            });
+        }
+
+        self.key.encrypt_sk(
+            module,
+            &sk_in_tmp,
+            &sk_out_tmp,
+            source_xa,
+            source_xe,
+            sigma,
+            scratch2,
+        );
+        self.sk_in_n = sk_in.n();
+        self.sk_out_n = sk_out.n();
+    }
+}

core/src/encryption/gglwe_tsk.rs

@@ -0,0 +1,87 @@
+use backend::hal::{
+    api::{
+        ScratchAvailable, SvpApply, TakeScalarZnx, TakeVecZnx, TakeVecZnxBig, TakeVecZnxDft, VecZnxAddScalarInplace,
+        VecZnxBigAllocBytes, VecZnxDftToVecZnxBigTmpA, VecZnxSwithcDegree,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecret, TakeGLWESecretExec,
+    layouts::{GGLWETensorKey, GLWESecret, GGLWESwitchingKey, Infos, prepared::GLWESecretExec},
+    trait_families::GLWEDecryptFamily,
+};
+
+use crate::trait_families::{GGLWETensorKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl GGLWETensorKey<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
+    where
+        Module<B>: GGLWETensorKeyEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        GLWESecretExec::bytes_of(module, n, rank)
+            + module.vec_znx_dft_alloc_bytes(n, rank, 1)
+            + module.vec_znx_big_alloc_bytes(n, 1, 1)
+            + module.vec_znx_dft_alloc_bytes(n, 1, 1)
+            + GLWESecret::bytes_of(n, 1)
+            + GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank, rank)
+    }
+}
+
+impl<DataSelf: DataMut> GGLWETensorKey<DataSelf> {
+    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        sk: &GLWESecret<DataSk>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GGLWETensorKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeVecZnxDft<B> + TakeVecZnxBig<B> + TakeGLWESecretExec<B> + TakeScalarZnx + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(self.rank(), sk.rank());
+            assert_eq!(self.n(), sk.n());
+        }
+
+        let n: usize = sk.n();
+
+        let rank: usize = self.rank();
+
+        let (mut sk_dft_prep, scratch1) = scratch.take_glwe_secret_exec(n, rank);
+        sk_dft_prep.prepare(module, &sk);
+
+        let (mut sk_dft, scratch2) = scratch1.take_vec_znx_dft(n, rank, 1);
+
+        (0..rank).for_each(|i| {
+            module.vec_znx_dft_from_vec_znx(1, 0, &mut sk_dft, i, &sk.data.as_vec_znx(), i);
+        });
+
+        let (mut sk_ij_big, scratch3) = scratch2.take_vec_znx_big(n, 1, 1);
+        let (mut sk_ij, scratch4) = scratch3.take_glwe_secret(n, 1);
+        let (mut sk_ij_dft, scratch5) = scratch4.take_vec_znx_dft(n, 1, 1);
+
+        (0..rank).for_each(|i| {
+            (i..rank).for_each(|j| {
+                module.svp_apply(&mut sk_ij_dft, 0, &sk_dft_prep.data, j, &sk_dft, i);
+
+                module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut sk_ij_big, 0, &mut sk_ij_dft, 0);
+                module.vec_znx_big_normalize(
+                    self.basek(),
+                    &mut sk_ij.data.as_vec_znx_mut(),
+                    0,
+                    &sk_ij_big,
+                    0,
+                    scratch5,
+                );
+
+                self.at_mut(i, j)
+                    .encrypt_sk(module, &sk_ij, sk, source_xa, source_xe, sigma, scratch5);
+            });
+        })
+    }
+}

core/src/encryption/ggsw_ct.rs

@@ -0,0 +1,81 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxNormalizeInplace, ZnxZero},
+    layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch, VecZnx},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWEPt,
+    layouts::{GGSWCiphertext, GLWECiphertext, Infos, prepared::GLWESecretExec},
+};
+
+use crate::trait_families::GLWEEncryptSkFamily;
+
+pub trait GGSWEncryptSkFamily<B: Backend> = GLWEEncryptSkFamily<B>;
+
+impl GGSWCiphertext<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
+    where
+        Module<B>: GGSWEncryptSkFamily<B>,
+    {
+        let size = k.div_ceil(basek);
+        GLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k)
+            + VecZnx::alloc_bytes(n, rank + 1, size)
+            + VecZnx::alloc_bytes(n, 1, size)
+            + module.vec_znx_dft_alloc_bytes(n, rank + 1, size)
+    }
+}
+
+impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
+    pub fn encrypt_sk<DataPt: DataRef, DataSk: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        pt: &ScalarZnx<DataPt>,
+        sk: &GLWESecretExec<DataSk, B>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GGSWEncryptSkFamily<B> + VecZnxAddScalarInplace,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            use backend::hal::api::ZnxInfos;
+
+            assert_eq!(self.rank(), sk.rank());
+            assert_eq!(self.n(), sk.n());
+            assert_eq!(pt.n(), sk.n());
+        }
+
+        let basek: usize = self.basek();
+        let k: usize = self.k();
+        let rank: usize = self.rank();
+        let digits: usize = self.digits();
+
+        let (mut tmp_pt, scratch1) = scratch.take_glwe_pt(self.n(), basek, k);
+
+        (0..self.rows()).for_each(|row_i| {
+            tmp_pt.data.zero();
+
+            // Adds the scalar_znx_pt to the i-th limb of the vec_znx_pt
+            module.vec_znx_add_scalar_inplace(&mut tmp_pt.data, 0, (digits - 1) + row_i * digits, pt, 0);
+            module.vec_znx_normalize_inplace(basek, &mut tmp_pt.data, 0, scratch1);
+
+            (0..rank + 1).for_each(|col_j| {
+                // rlwe encrypt of vec_znx_pt into vec_znx_ct
+
+                self.at_mut(row_i, col_j).encrypt_sk_internal(
+                    module,
+                    Some((&tmp_pt, col_j)),
+                    sk,
+                    source_xa,
+                    source_xe,
+                    sigma,
+                    scratch1,
+                );
+            });
+        });
+    }
+}

core/src/encryption/glwe_ct.rs

@@ -1,44 +1,23 @@
 use backend::hal::{
     api::{
-        ScratchAvailable, SvpApply, SvpApplyInplace, SvpPPolAllocBytes, SvpPrepare, TakeScalarZnx, TakeSvpPPol, TakeVecZnx,
-        TakeVecZnxDft, VecZnxAddInplace, VecZnxAddNormal, VecZnxBigAddNormal, VecZnxBigAddSmallInplace, VecZnxBigAllocBytes,
-        VecZnxBigNormalize, VecZnxDftAllocBytes, VecZnxDftFromVecZnx, VecZnxDftToVecZnxBigConsume, VecZnxFillUniform,
-        VecZnxNormalize, VecZnxNormalizeInplace, VecZnxNormalizeTmpBytes, VecZnxSub, VecZnxSubABInplace, ZnxInfos, ZnxZero,
+        ScratchAvailable, SvpApply, SvpPPolAllocBytes, SvpPrepare, TakeScalarZnx, TakeSvpPPol, TakeVecZnx, TakeVecZnxDft,
+        VecZnxBigAddNormal, VecZnxBigAddSmallInplace, VecZnxBigNormalize, VecZnxDftAllocBytes, VecZnxDftToVecZnxBigConsume,
+        ZnxInfos, ZnxZero,
     },
     layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch, VecZnx, VecZnxBig},
 };
 use sampling::source::Source;
 
 use crate::{
-    GLWECiphertext, GLWECiphertextCompressed, GLWEPlaintext, GLWEPublicKeyExec, GLWESecretExec, Infos, SIX_SIGMA,
+    SIX_SIGMA,
     dist::Distribution,
+    layouts::{
+        GLWECiphertext, GLWEPlaintext, Infos,
+        prepared::{GLWEPublicKeyExec, GLWESecretExec},
+    },
+    trait_families::{GLWEEncryptPkFamily, GLWEEncryptSkFamily},
 };
 
-pub trait GLWEEncryptSkFamily<B: Backend> = VecZnxDftAllocBytes
-    + VecZnxBigNormalize<B>
-    + VecZnxDftFromVecZnx<B>
-    + SvpApplyInplace<B>
-    + VecZnxDftToVecZnxBigConsume<B>
-    + VecZnxNormalizeTmpBytes
-    + VecZnxFillUniform
-    + VecZnxSubABInplace
-    + VecZnxAddInplace
-    + VecZnxNormalizeInplace<B>
-    + VecZnxAddNormal
-    + VecZnxNormalize<B>
-    + VecZnxSub;
-
-pub trait GLWEEncryptPkFamily<B: Backend> = VecZnxDftAllocBytes
-    + VecZnxBigAllocBytes
-    + SvpPPolAllocBytes
-    + SvpPrepare<B>
-    + SvpApply<B>
-    + VecZnxDftToVecZnxBigConsume<B>
-    + VecZnxBigAddNormal<B>
-    + VecZnxBigAddSmallInplace<B>
-    + VecZnxBigNormalize<B>
-    + VecZnxNormalizeTmpBytes;
-
 impl GLWECiphertext<Vec<u8>> {
     pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
     where
@@ -144,7 +123,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
     {
         let cols: usize = self.rank() + 1;
-        encrypt_sk_internal(
+        glwe_encrypt_sk_internal(
             module,
             self.basek(),
             self.k(),
@@ -296,73 +275,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     }
 }
 
-impl GLWECiphertextCompressed<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
-    where
-        Module<B>: GLWEEncryptSkFamily<B>,
-    {
-        GLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k)
-    }
-}
-impl<D: DataMut> GLWECiphertextCompressed<D> {
-    pub fn encrypt_sk<DataPt: DataRef, DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        pt: &GLWEPlaintext<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
-        seed_xa: [u8; 32],
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GLWEEncryptSkFamily<B>,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
-    {
-        self.encrypt_sk_internal(
-            module,
-            Some((pt, 0)),
-            sk,
-            seed_xa,
-            source_xe,
-            sigma,
-            scratch,
-        );
-    }
-
-    pub(crate) fn encrypt_sk_internal<DataPt: DataRef, DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        pt: Option<(&GLWEPlaintext<DataPt>, usize)>,
-        sk: &GLWESecretExec<DataSk, B>,
-        seed_xa: [u8; 32],
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GLWEEncryptSkFamily<B>,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
-    {
-        let mut source_xa = Source::new(seed_xa);
-        let cols: usize = self.rank() + 1;
-        encrypt_sk_internal(
-            module,
-            self.basek(),
-            self.k(),
-            &mut self.data,
-            cols,
-            true,
-            pt,
-            sk,
-            &mut source_xa,
-            source_xe,
-            sigma,
-            scratch,
-        );
-        self.seed = seed_xa;
-    }
-}
-
-pub(crate) fn encrypt_sk_internal<DataCt: DataMut, DataPt: DataRef, DataSk: DataRef, B: Backend>(
+pub(crate) fn glwe_encrypt_sk_internal<DataCt: DataMut, DataPt: DataRef, DataSk: DataRef, B: Backend>(
     module: &Module<B>,
     basek: usize,
     k: usize,
@@ -382,6 +295,8 @@ pub(crate) fn encrypt_sk_internal<DataCt: DataMut, DataPt: DataRef, DataSk: Data
     #[cfg(debug_assertions)]
     {
         if compressed {
+            use backend::hal::api::ZnxInfos;
+
             assert_eq!(
                 ct.cols(),
                 1,

core/src/encryption/glwe_pk.rs

@@ -0,0 +1,53 @@
+use backend::hal::{
+    api::{ScratchOwnedAlloc, ScratchOwnedBorrow},
+    layouts::{Backend, DataMut, DataRef, Module, ScratchOwned},
+    oep::{ScratchAvailableImpl, ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeVecZnxDftImpl, TakeVecZnxImpl},
+};
+use sampling::source::Source;
+
+use crate::{
+    dist::Distribution,
+    layouts::{GLWECiphertext, GLWEPublicKey, Infos, prepared::GLWESecretExec},
+};
+
+use crate::trait_families::GLWEEncryptSkFamily;
+
+impl<D: DataMut> GLWEPublicKey<D> {
+    pub fn generate_from_sk<S: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        sk: &GLWESecretExec<S, B>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+    ) where
+        Module<B>: GLWEEncryptSkFamily<B>,
+        B: ScratchOwnedAllocImpl<B>
+            + ScratchOwnedBorrowImpl<B>
+            + TakeVecZnxDftImpl<B>
+            + ScratchAvailableImpl<B>
+            + TakeVecZnxImpl<B>,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(self.n(), sk.n());
+
+            match sk.dist {
+                Distribution::NONE => panic!("invalid sk: SecretDistribution::NONE"),
+                _ => {}
+            }
+        }
+
+        // Its ok to allocate scratch space here since pk is usually generated only once.
+        let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(GLWECiphertext::encrypt_sk_scratch_space(
+            module,
+            self.n(),
+            self.basek(),
+            self.k(),
+        ));
+
+        let mut tmp: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(self.n(), self.basek(), self.k(), self.rank());
+        tmp.encrypt_zero_sk(module, sk, source_xa, source_xe, sigma, scratch.borrow());
+        self.dist = sk.dist;
+    }
+}

core/src/encryption/glwe_to_lwe_ksk.rs

@@ -0,0 +1,67 @@
+use backend::hal::{
+    api::{
+        ScratchAvailable, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxAutomorphismInplace,
+        VecZnxSwithcDegree, ZnxView, ZnxViewMut, ZnxZero,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecret, TakeGLWESecretExec,
+    layouts::{GLWESecret, GGLWESwitchingKey, GLWEToLWESwitchingKey, LWESecret, prepared::GLWESecretExec},
+};
+
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl GLWEToLWESwitchingKey<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank_in: usize) -> usize
+    where
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        GLWESecretExec::bytes_of(module, n, rank_in)
+            + (GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank_in, 1) | GLWESecret::bytes_of(n, rank_in))
+    }
+}
+
+impl<D: DataMut> GLWEToLWESwitchingKey<D> {
+    pub fn encrypt_sk<DLwe, DGlwe, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        sk_lwe: &LWESecret<DLwe>,
+        sk_glwe: &GLWESecret<DGlwe>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        DLwe: DataRef,
+        DGlwe: DataRef,
+        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B>
+            + VecZnxAutomorphismInplace
+            + VecZnxSwithcDegree
+            + VecZnxAddScalarInplace
+            + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert!(sk_lwe.n() <= module.n());
+        }
+
+        let (mut sk_lwe_as_glwe, scratch1) = scratch.take_glwe_secret(sk_glwe.n(), 1);
+        sk_lwe_as_glwe.data.zero();
+        sk_lwe_as_glwe.data.at_mut(0, 0)[..sk_lwe.n()].copy_from_slice(sk_lwe.data.at(0, 0));
+        module.vec_znx_automorphism_inplace(-1, &mut sk_lwe_as_glwe.data.as_vec_znx_mut(), 0);
+
+        self.0.encrypt_sk(
+            module,
+            sk_glwe,
+            &sk_lwe_as_glwe,
+            source_xa,
+            source_xe,
+            sigma,
+            scratch1,
+        );
+    }
+}

core/src/encryption/lwe_ct.rs

@@ -0,0 +1,82 @@
+use backend::hal::{
+    api::{
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddNormal, VecZnxFillUniform, VecZnxNormalizeInplace, ZnxView, ZnxViewMut,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, ScratchOwned, VecZnx},
+    oep::{ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl},
+};
+use sampling::source::Source;
+
+use crate::{
+    SIX_SIGMA,
+    layouts::{Infos, LWECiphertext, LWEPlaintext, LWESecret},
+};
+
+impl<DataSelf: DataMut> LWECiphertext<DataSelf> {
+    pub fn encrypt_sk<DataPt, DataSk, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        pt: &LWEPlaintext<DataPt>,
+        sk: &LWESecret<DataSk>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+    ) where
+        DataPt: DataRef,
+        DataSk: DataRef,
+        Module<B>: VecZnxFillUniform + VecZnxAddNormal + VecZnxNormalizeInplace<B>,
+        B: ScratchOwnedAllocImpl<B> + ScratchOwnedBorrowImpl<B>,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(self.n(), sk.n())
+        }
+
+        let basek: usize = self.basek();
+        let k: usize = self.k();
+
+        module.vec_znx_fill_uniform(basek, &mut self.data, 0, k, source_xa);
+
+        let mut tmp_znx: VecZnx<Vec<u8>> = VecZnx::alloc(1, 1, self.size());
+
+        let min_size = self.size().min(pt.size());
+
+        (0..min_size).for_each(|i| {
+            tmp_znx.at_mut(0, i)[0] = pt.data.at(0, i)[0]
+                - self.data.at(0, i)[1..]
+                    .iter()
+                    .zip(sk.data.at(0, 0))
+                    .map(|(x, y)| x * y)
+                    .sum::<i64>();
+        });
+
+        (min_size..self.size()).for_each(|i| {
+            tmp_znx.at_mut(0, i)[0] -= self.data.at(0, i)[1..]
+                .iter()
+                .zip(sk.data.at(0, 0))
+                .map(|(x, y)| x * y)
+                .sum::<i64>();
+        });
+
+        module.vec_znx_add_normal(
+            basek,
+            &mut self.data,
+            0,
+            k,
+            source_xe,
+            sigma,
+            sigma * SIX_SIGMA,
+        );
+
+        module.vec_znx_normalize_inplace(
+            basek,
+            &mut tmp_znx,
+            0,
+            ScratchOwned::alloc(size_of::<i64>()).borrow(),
+        );
+
+        (0..self.size()).for_each(|i| {
+            self.data.at_mut(0, i)[0] = tmp_znx.at(0, i)[0];
+        });
+    }
+}

core/src/encryption/lwe_ksk.rs

@@ -0,0 +1,76 @@
+use backend::hal::{
+    api::{
+        ScratchAvailable, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxAutomorphismInplace,
+        VecZnxSwithcDegree, ZnxView, ZnxViewMut,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecret, TakeGLWESecretExec,
+    layouts::{GLWESecret, GGLWESwitchingKey, Infos, LWESecret, LWESwitchingKey, prepared::GLWESecretExec},
+};
+
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl LWESwitchingKey<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
+    where
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        GLWESecret::bytes_of(n, 1)
+            + GLWESecretExec::bytes_of(module, n, 1)
+            + GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, 1, 1)
+    }
+}
+
+impl<D: DataMut> LWESwitchingKey<D> {
+    pub fn encrypt_sk<DIn, DOut, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        sk_lwe_in: &LWESecret<DIn>,
+        sk_lwe_out: &LWESecret<DOut>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        DIn: DataRef,
+        DOut: DataRef,
+        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B>
+            + VecZnxAutomorphismInplace
+            + VecZnxSwithcDegree
+            + VecZnxAddScalarInplace
+            + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert!(sk_lwe_in.n() <= self.n());
+            assert!(sk_lwe_out.n() <= self.n());
+            assert!(self.n() <= module.n());
+        }
+
+        let (mut sk_in_glwe, scratch1) = scratch.take_glwe_secret(self.n(), 1);
+        let (mut sk_out_glwe, scratch2) = scratch1.take_glwe_secret(self.n(), 1);
+
+        sk_out_glwe.data.at_mut(0, 0)[..sk_lwe_out.n()].copy_from_slice(sk_lwe_out.data.at(0, 0));
+        sk_out_glwe.data.at_mut(0, 0)[sk_lwe_out.n()..].fill(0);
+        module.vec_znx_automorphism_inplace(-1, &mut sk_out_glwe.data.as_vec_znx_mut(), 0);
+
+        sk_in_glwe.data.at_mut(0, 0)[..sk_lwe_in.n()].copy_from_slice(sk_lwe_in.data.at(0, 0));
+        sk_in_glwe.data.at_mut(0, 0)[sk_lwe_in.n()..].fill(0);
+        module.vec_znx_automorphism_inplace(-1, &mut sk_in_glwe.data.as_vec_znx_mut(), 0);
+
+        self.0.encrypt_sk(
+            module,
+            &sk_in_glwe,
+            &sk_out_glwe,
+            source_xa,
+            source_xe,
+            sigma,
+            scratch2,
+        );
+    }
+}

core/src/encryption/lwe_to_glwe_ksk.rs

@@ -0,0 +1,66 @@
+use backend::hal::{
+    api::{
+        ScratchAvailable, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, VecZnxAutomorphismInplace,
+        VecZnxSwithcDegree, ZnxView, ZnxViewMut,
+    },
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+use sampling::source::Source;
+
+use crate::{
+    TakeGLWESecret, TakeGLWESecretExec,
+    layouts::{GLWESecret, GGLWESwitchingKey, LWESecret, LWEToGLWESwitchingKey},
+};
+
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+
+impl LWEToGLWESwitchingKey<Vec<u8>> {
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank_out: usize) -> usize
+    where
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, 1, rank_out) + GLWESecret::bytes_of(n, 1)
+    }
+}
+
+impl<D: DataMut> LWEToGLWESwitchingKey<D> {
+    pub fn encrypt_sk<DLwe, DGlwe, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        sk_lwe: &LWESecret<DLwe>,
+        sk_glwe: &GLWESecret<DGlwe>,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        sigma: f64,
+        scratch: &mut Scratch<B>,
+    ) where
+        DLwe: DataRef,
+        DGlwe: DataRef,
+        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B>
+            + VecZnxAutomorphismInplace
+            + VecZnxSwithcDegree
+            + VecZnxAddScalarInplace
+            + GLWESecretExecModuleFamily<B>,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert!(sk_lwe.n() <= module.n());
+        }
+
+        let (mut sk_lwe_as_glwe, scratch1) = scratch.take_glwe_secret(sk_glwe.n(), 1);
+        sk_lwe_as_glwe.data.at_mut(0, 0)[..sk_lwe.n()].copy_from_slice(sk_lwe.data.at(0, 0));
+        sk_lwe_as_glwe.data.at_mut(0, 0)[sk_lwe.n()..].fill(0);
+        module.vec_znx_automorphism_inplace(-1, &mut sk_lwe_as_glwe.data.as_vec_znx_mut(), 0);
+
+        self.0.encrypt_sk(
+            module,
+            &sk_lwe_as_glwe,
+            &sk_glwe,
+            source_xa,
+            source_xe,
+            sigma,
+            scratch1,
+        );
+    }
+}

core/src/encryption/mod.rs

@@ -0,0 +1,14 @@
+mod compressed;
+mod gglwe_atk;
+mod gglwe_ct;
+mod gglwe_ksk;
+mod gglwe_tsk;
+mod ggsw_ct;
+mod glwe_ct;
+mod glwe_pk;
+mod glwe_to_lwe_ksk;
+mod lwe_ct;
+mod lwe_ksk;
+mod lwe_to_glwe_ksk;
+
+pub(crate) use glwe_ct::glwe_encrypt_sk_internal;

core/src/external_product/gglwe_atk.rs

@@ -0,0 +1,69 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeVecZnxDft},
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+
+use crate::{
+    layouts::{GGLWEAutomorphismKey, GGLWESwitchingKey, prepared::GGSWCiphertextExec},
+    trait_families::GLWEExternalProductFamily,
+};
+
+impl GGLWEAutomorphismKey<Vec<u8>> {
+    pub fn external_product_scratch_space<B: Backend>(
+        module: &Module<B>,
+        n: usize,
+        basek: usize,
+        k_out: usize,
+        k_in: usize,
+        ggsw_k: usize,
+        digits: usize,
+        rank: usize,
+    ) -> usize
+    where
+        Module<B>: GLWEExternalProductFamily<B>,
+    {
+        GGLWESwitchingKey::external_product_scratch_space(module, n, basek, k_out, k_in, ggsw_k, digits, rank)
+    }
+
+    pub fn external_product_inplace_scratch_space<B: Backend>(
+        module: &Module<B>,
+        n: usize,
+        basek: usize,
+        k_out: usize,
+        ggsw_k: usize,
+        digits: usize,
+        rank: usize,
+    ) -> usize
+    where
+        Module<B>: GLWEExternalProductFamily<B>,
+    {
+        GGLWESwitchingKey::external_product_inplace_scratch_space(module, n, basek, k_out, ggsw_k, digits, rank)
+    }
+}
+
+impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
+    pub fn external_product<DataLhs: DataRef, DataRhs: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        lhs: &GGLWEAutomorphismKey<DataLhs>,
+        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GLWEExternalProductFamily<B>,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable,
+    {
+        self.key.external_product(module, &lhs.key, rhs, scratch);
+    }
+
+    pub fn external_product_inplace<DataRhs: DataRef, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        scratch: &mut Scratch<B>,
+    ) where
+        Module<B>: GLWEExternalProductFamily<B>,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable,
+    {
+        self.key.external_product_inplace(module, rhs, scratch);
+    }
+}

core/src/external_product/gglwe_ksk.rs

@@ -3,9 +3,12 @@ use backend::hal::{
     layouts::{Backend, DataMut, DataRef, Module, Scratch},
 };
 
-use crate::{AutomorphismKey, GGSWCiphertextExec, GLWECiphertext, GLWEExternalProductFamily, GLWESwitchingKey, Infos};
+use crate::{
+    layouts::{GLWECiphertext, GGLWESwitchingKey, Infos, prepared::GGSWCiphertextExec},
+    trait_families::GLWEExternalProductFamily,
+};
 
-impl GLWESwitchingKey<Vec<u8>> {
+impl GGLWESwitchingKey<Vec<u8>> {
     pub fn external_product_scratch_space<B: Backend>(
         module: &Module<B>,
         n: usize,
@@ -38,11 +41,11 @@ impl GLWESwitchingKey<Vec<u8>> {
     }
 }
 
-impl<DataSelf: DataMut> GLWESwitchingKey<DataSelf> {
+impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
     pub fn external_product<DataLhs: DataRef, DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        lhs: &GLWESwitchingKey<DataLhs>,
+        lhs: &GGLWESwitchingKey<DataLhs>,
         rhs: &GGSWCiphertextExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
@@ -116,63 +119,3 @@ impl<DataSelf: DataMut> GLWESwitchingKey<DataSelf> {
         });
     }
 }
-
-impl AutomorphismKey<Vec<u8>> {
-    pub fn external_product_scratch_space<B: Backend>(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k_out: usize,
-        k_in: usize,
-        ggsw_k: usize,
-        digits: usize,
-        rank: usize,
-    ) -> usize
-    where
-        Module<B>: GLWEExternalProductFamily<B>,
-    {
-        GLWESwitchingKey::external_product_scratch_space(module, n, basek, k_out, k_in, ggsw_k, digits, rank)
-    }
-
-    pub fn external_product_inplace_scratch_space<B: Backend>(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k_out: usize,
-        ggsw_k: usize,
-        digits: usize,
-        rank: usize,
-    ) -> usize
-    where
-        Module<B>: GLWEExternalProductFamily<B>,
-    {
-        GLWESwitchingKey::external_product_inplace_scratch_space(module, n, basek, k_out, ggsw_k, digits, rank)
-    }
-}
-
-impl<DataSelf: DataMut> AutomorphismKey<DataSelf> {
-    pub fn external_product<DataLhs: DataRef, DataRhs: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        lhs: &AutomorphismKey<DataLhs>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GLWEExternalProductFamily<B>,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable,
-    {
-        self.key.external_product(module, &lhs.key, rhs, scratch);
-    }
-
-    pub fn external_product_inplace<DataRhs: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GLWEExternalProductFamily<B>,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable,
-    {
-        self.key.external_product_inplace(module, rhs, scratch);
-    }
-}

core/src/external_product/ggsw_ct.rs

@@ -3,7 +3,10 @@ use backend::hal::{
     layouts::{Backend, DataMut, DataRef, Module, Scratch},
 };
 
-use crate::{GGSWCiphertext, GGSWCiphertextExec, GLWECiphertext, GLWEExternalProductFamily, Infos};
+use crate::{
+    layouts::{GGSWCiphertext, GLWECiphertext, Infos, prepared::GGSWCiphertextExec},
+    trait_families::GLWEExternalProductFamily,
+};
 
 impl GGSWCiphertext<Vec<u8>> {
     pub fn external_product_scratch_space<B: Backend>(
@@ -51,7 +54,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     {
         #[cfg(debug_assertions)]
         {
-            use crate::{GGSWCiphertext, Infos};
+            use crate::layouts::Infos;
 
             assert_eq!(lhs.n(), self.n());
             assert_eq!(rhs.n(), self.n());

core/src/external_product/glwe_ct.rs

@@ -6,16 +6,10 @@ use backend::hal::{
     layouts::{Backend, DataMut, DataRef, Module, Scratch, VecZnxBig},
 };
 
-use crate::{GGSWCiphertextExec, GLWECiphertext, Infos};
-
-pub trait GLWEExternalProductFamily<B: Backend> = VecZnxDftAllocBytes
-    + VmpApplyTmpBytes
-    + VmpApply<B>
-    + VmpApplyAdd<B>
-    + VecZnxDftFromVecZnx<B>
-    + VecZnxDftToVecZnxBigConsume<B>
-    + VecZnxBigNormalize<B>
-    + VecZnxNormalizeTmpBytes;
+use crate::{
+    layouts::{GLWECiphertext, Infos, prepared::GGSWCiphertextExec},
+    trait_families::GLWEExternalProductFamily,
+};
 
 impl GLWECiphertext<Vec<u8>> {
     pub fn external_product_scratch_space<B: Backend>(

core/src/external_product/mod.rs

@@ -0,0 +1,4 @@
+mod gglwe_atk;
+mod gglwe_ksk;
+mod ggsw_ct;
+mod glwe_ct;

core/src/gglwe/encryption.rs

@@ -1,702 +0,0 @@
-use backend::hal::{
-    api::{
-        ScratchAvailable, SvpApply, TakeScalarZnx, TakeVecZnx, TakeVecZnxBig, TakeVecZnxDft, VecZnxAddScalarInplace,
-        VecZnxAutomorphism, VecZnxBigAllocBytes, VecZnxDftToVecZnxBigTmpA, VecZnxNormalizeInplace, VecZnxNormalizeTmpBytes,
-        VecZnxSwithcDegree, ZnxZero,
-    },
-    layouts::{Backend, DataMut, DataRef, Module, ScalarZnx, Scratch},
-};
-use sampling::source::Source;
-
-use crate::{
-    AutomorphismKey, AutomorphismKeyCompressed, GGLWECiphertext, GGLWECiphertextCompressed, GLWECiphertext, GLWEDecryptFamily,
-    GLWEEncryptSkFamily, GLWEPlaintext, GLWESecret, GLWESecretExec, GLWESecretFamily, GLWESwitchingKey,
-    GLWESwitchingKeyCompressed, GLWETensorKey, GLWETensorKeyCompressed, Infos, TakeGLWEPt, TakeGLWESecret, TakeGLWESecretExec,
-    encrypt_sk_internal,
-};
-
-pub trait GGLWEEncryptSkFamily<B: Backend> = GLWEEncryptSkFamily<B> + GLWESecretFamily<B>;
-
-impl GGLWECiphertext<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
-    where
-        Module<B>: GGLWEEncryptSkFamily<B>,
-    {
-        GLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k)
-            + (GLWEPlaintext::byte_of(n, basek, k) | module.vec_znx_normalize_tmp_bytes(n))
-    }
-
-    pub fn encrypt_pk_scratch_space<B: Backend>(_module: &Module<B>, _n: usize, _basek: usize, _k: usize, _rank: usize) -> usize {
-        unimplemented!()
-    }
-}
-
-impl<DataSelf: DataMut> GGLWECiphertext<DataSelf> {
-    pub fn encrypt_sk<DataPt: DataRef, DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        pt: &ScalarZnx<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
-        source_xa: &mut Source,
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GGLWEEncryptSkFamily<B> + VecZnxAddScalarInplace,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            use backend::hal::api::ZnxInfos;
-
-            assert_eq!(
-                self.rank_in(),
-                pt.cols(),
-                "self.rank_in(): {} != pt.cols(): {}",
-                self.rank_in(),
-                pt.cols()
-            );
-            assert_eq!(
-                self.rank_out(),
-                sk.rank(),
-                "self.rank_out(): {} != sk.rank(): {}",
-                self.rank_out(),
-                sk.rank()
-            );
-            assert_eq!(self.n(), sk.n());
-            assert_eq!(pt.n(), sk.n());
-            assert!(
-                scratch.available() >= GGLWECiphertext::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k()),
-                "scratch.available: {} < GGLWECiphertext::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
-                scratch.available(),
-                self.rank(),
-                self.size(),
-                GGLWECiphertext::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k())
-            );
-            assert!(
-                self.rows() * self.digits() * self.basek() <= self.k(),
-                "self.rows() : {} * self.digits() : {} * self.basek() : {} = {} >= self.k() = {}",
-                self.rows(),
-                self.digits(),
-                self.basek(),
-                self.rows() * self.digits() * self.basek(),
-                self.k()
-            );
-        }
-
-        let rows: usize = self.rows();
-        let digits: usize = self.digits();
-        let basek: usize = self.basek();
-        let k: usize = self.k();
-        let rank_in: usize = self.rank_in();
-
-        let (mut tmp_pt, scrach_1) = scratch.take_glwe_pt(sk.n(), basek, k);
-        // For each input column (i.e. rank) produces a GGLWE ciphertext of rank_out+1 columns
-        //
-        // Example for ksk rank 2 to rank 3:
-        //
-        // (-(a0*s0 + a1*s1 + a2*s2) + s0', a0, a1, a2)
-        // (-(b0*s0 + b1*s1 + b2*s2) + s0', b0, b1, b2)
-        //
-        // Example ksk rank 2 to rank 1
-        //
-        // (-(a*s) + s0, a)
-        // (-(b*s) + s1, b)
-        (0..rank_in).for_each(|col_i| {
-            (0..rows).for_each(|row_i| {
-                // Adds the scalar_znx_pt to the i-th limb of the vec_znx_pt
-                tmp_pt.data.zero(); // zeroes for next iteration
-                module.vec_znx_add_scalar_inplace(
-                    &mut tmp_pt.data,
-                    0,
-                    (digits - 1) + row_i * digits,
-                    pt,
-                    col_i,
-                );
-                module.vec_znx_normalize_inplace(basek, &mut tmp_pt.data, 0, scrach_1);
-
-                // rlwe encrypt of vec_znx_pt into vec_znx_ct
-                self.at_mut(row_i, col_i)
-                    .encrypt_sk(module, &tmp_pt, sk, source_xa, source_xe, sigma, scrach_1);
-            });
-        });
-    }
-}
-
-impl GGLWECiphertextCompressed<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
-    where
-        Module<B>: GLWESwitchingKeyEncryptSkFamily<B>,
-    {
-        GGLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k)
-    }
-}
-
-impl<D: DataMut> GGLWECiphertextCompressed<D> {
-    pub fn encrypt_sk<DataPt: DataRef, DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        pt: &ScalarZnx<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
-        seed: [u8; 32],
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GGLWEEncryptSkFamily<B> + VecZnxAddScalarInplace,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            use backend::hal::api::ZnxInfos;
-
-            assert_eq!(
-                self.rank_in(),
-                pt.cols(),
-                "self.rank_in(): {} != pt.cols(): {}",
-                self.rank_in(),
-                pt.cols()
-            );
-            assert_eq!(
-                self.rank_out(),
-                sk.rank(),
-                "self.rank_out(): {} != sk.rank(): {}",
-                self.rank_out(),
-                sk.rank()
-            );
-            assert_eq!(self.n(), sk.n());
-            assert_eq!(pt.n(), sk.n());
-            assert!(
-                scratch.available()
-                    >= GGLWECiphertextCompressed::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k()),
-                "scratch.available: {} < GGLWECiphertext::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
-                scratch.available(),
-                self.rank(),
-                self.size(),
-                GGLWECiphertextCompressed::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k())
-            );
-            assert!(
-                self.rows() * self.digits() * self.basek() <= self.k(),
-                "self.rows() : {} * self.digits() : {} * self.basek() : {} = {} >= self.k() = {}",
-                self.rows(),
-                self.digits(),
-                self.basek(),
-                self.rows() * self.digits() * self.basek(),
-                self.k()
-            );
-        }
-
-        let rows: usize = self.rows();
-        let digits: usize = self.digits();
-        let basek: usize = self.basek();
-        let k: usize = self.k();
-        let rank_in: usize = self.rank_in();
-        let cols: usize = self.rank_out() + 1;
-
-        let mut source_xa = Source::new(seed);
-
-        let (mut tmp_pt, scrach_1) = scratch.take_glwe_pt(sk.n(), basek, k);
-        (0..rank_in).for_each(|col_i| {
-            (0..rows).for_each(|row_i| {
-                // Adds the scalar_znx_pt to the i-th limb of the vec_znx_pt
-                tmp_pt.data.zero(); // zeroes for next iteration
-                module.vec_znx_add_scalar_inplace(
-                    &mut tmp_pt.data,
-                    0,
-                    (digits - 1) + row_i * digits,
-                    pt,
-                    col_i,
-                );
-                module.vec_znx_normalize_inplace(basek, &mut tmp_pt.data, 0, scrach_1);
-
-                let (seed, mut source_xa_tmp) = source_xa.branch();
-                self.seed[col_i * rows + row_i] = seed;
-
-                encrypt_sk_internal(
-                    module,
-                    self.basek(),
-                    self.k(),
-                    &mut self.at_mut(row_i, col_i).data,
-                    cols,
-                    true,
-                    Some((&tmp_pt, 0)),
-                    sk,
-                    &mut source_xa_tmp,
-                    source_xe,
-                    sigma,
-                    scrach_1,
-                );
-            });
-        });
-    }
-}
-
-pub trait GLWESwitchingKeyEncryptSkFamily<B: Backend> = GGLWEEncryptSkFamily<B>;
-
-impl GLWESwitchingKey<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k: usize,
-        rank_in: usize,
-        rank_out: usize,
-    ) -> usize
-    where
-        Module<B>: GLWESwitchingKeyEncryptSkFamily<B>,
-    {
-        (GGLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k) | ScalarZnx::alloc_bytes(n, 1))
-            + ScalarZnx::alloc_bytes(n, rank_in)
-            + GLWESecretExec::bytes_of(module, n, rank_out)
-    }
-
-    pub fn encrypt_pk_scratch_space<B: Backend>(
-        module: &Module<B>,
-        _n: usize,
-        _basek: usize,
-        _k: usize,
-        _rank_in: usize,
-        _rank_out: usize,
-    ) -> usize {
-        GGLWECiphertext::encrypt_pk_scratch_space(module, _n, _basek, _k, _rank_out)
-    }
-}
-
-impl<DataSelf: DataMut> GLWESwitchingKey<DataSelf> {
-    pub fn encrypt_sk<DataSkIn: DataRef, DataSkOut: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        sk_in: &GLWESecret<DataSkIn>,
-        sk_out: &GLWESecret<DataSkOut>,
-        source_xa: &mut Source,
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GLWESwitchingKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + ScratchAvailable + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert!(sk_in.n() <= module.n());
-            assert!(sk_out.n() <= module.n());
-            assert!(
-                scratch.available()
-                    >= GLWESwitchingKey::encrypt_sk_scratch_space(
-                        module,
-                        sk_out.n(),
-                        self.basek(),
-                        self.k(),
-                        self.rank_in(),
-                        self.rank_out()
-                    ),
-                "scratch.available()={} < GLWESwitchingKey::encrypt_sk_scratch_space={}",
-                scratch.available(),
-                GLWESwitchingKey::encrypt_sk_scratch_space(
-                    module,
-                    sk_out.n(),
-                    self.basek(),
-                    self.k(),
-                    self.rank_in(),
-                    self.rank_out()
-                )
-            )
-        }
-
-        let n: usize = sk_in.n().max(sk_out.n());
-
-        let (mut sk_in_tmp, scratch1) = scratch.take_scalar_znx(n, sk_in.rank());
-        (0..sk_in.rank()).for_each(|i| {
-            module.vec_znx_switch_degree(
-                &mut sk_in_tmp.as_vec_znx_mut(),
-                i,
-                &sk_in.data.as_vec_znx(),
-                i,
-            );
-        });
-
-        let (mut sk_out_tmp, scratch2) = scratch1.take_glwe_secret_exec(n, sk_out.rank());
-        {
-            let (mut tmp, _) = scratch2.take_scalar_znx(n, 1);
-            (0..sk_out.rank()).for_each(|i| {
-                module.vec_znx_switch_degree(&mut tmp.as_vec_znx_mut(), 0, &sk_out.data.as_vec_znx(), i);
-                module.svp_prepare(&mut sk_out_tmp.data, i, &tmp, 0);
-            });
-        }
-
-        self.key.encrypt_sk(
-            module,
-            &sk_in_tmp,
-            &sk_out_tmp,
-            source_xa,
-            source_xe,
-            sigma,
-            scratch2,
-        );
-        self.sk_in_n = sk_in.n();
-        self.sk_out_n = sk_out.n();
-    }
-}
-
-impl GLWESwitchingKeyCompressed<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k: usize,
-        rank_in: usize,
-        rank_out: usize,
-    ) -> usize
-    where
-        Module<B>: GLWESwitchingKeyEncryptSkFamily<B>,
-    {
-        (GGLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k) | ScalarZnx::alloc_bytes(n, 1))
-            + ScalarZnx::alloc_bytes(n, rank_in)
-            + GLWESecretExec::bytes_of(module, n, rank_out)
-    }
-}
-
-impl<DataSelf: DataMut> GLWESwitchingKeyCompressed<DataSelf> {
-    pub fn encrypt_sk<DataSkIn: DataRef, DataSkOut: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        sk_in: &GLWESecret<DataSkIn>,
-        sk_out: &GLWESecret<DataSkOut>,
-        seed_xa: [u8; 32],
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GLWESwitchingKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + ScratchAvailable + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert!(sk_in.n() <= module.n());
-            assert!(sk_out.n() <= module.n());
-            assert!(
-                scratch.available()
-                    >= GLWESwitchingKey::encrypt_sk_scratch_space(
-                        module,
-                        sk_out.n(),
-                        self.basek(),
-                        self.k(),
-                        self.rank_in(),
-                        self.rank_out()
-                    ),
-                "scratch.available()={} < GLWESwitchingKey::encrypt_sk_scratch_space={}",
-                scratch.available(),
-                GLWESwitchingKey::encrypt_sk_scratch_space(
-                    module,
-                    sk_out.n(),
-                    self.basek(),
-                    self.k(),
-                    self.rank_in(),
-                    self.rank_out()
-                )
-            )
-        }
-
-        let n: usize = sk_in.n().max(sk_out.n());
-
-        let (mut sk_in_tmp, scratch1) = scratch.take_scalar_znx(n, sk_in.rank());
-        (0..sk_in.rank()).for_each(|i| {
-            module.vec_znx_switch_degree(
-                &mut sk_in_tmp.as_vec_znx_mut(),
-                i,
-                &sk_in.data.as_vec_znx(),
-                i,
-            );
-        });
-
-        let (mut sk_out_tmp, scratch2) = scratch1.take_glwe_secret_exec(n, sk_out.rank());
-        {
-            let (mut tmp, _) = scratch2.take_scalar_znx(n, 1);
-            (0..sk_out.rank()).for_each(|i| {
-                module.vec_znx_switch_degree(&mut tmp.as_vec_znx_mut(), 0, &sk_out.data.as_vec_znx(), i);
-                module.svp_prepare(&mut sk_out_tmp.data, i, &tmp, 0);
-            });
-        }
-
-        self.key.encrypt_sk(
-            module,
-            &sk_in_tmp,
-            &sk_out_tmp,
-            seed_xa,
-            source_xe,
-            sigma,
-            scratch2,
-        );
-        self.sk_in_n = sk_in.n();
-        self.sk_out_n = sk_out.n();
-    }
-}
-
-pub trait AutomorphismKeyEncryptSkFamily<B: Backend> = GGLWEEncryptSkFamily<B>;
-
-impl AutomorphismKey<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: AutomorphismKeyEncryptSkFamily<B>,
-    {
-        GLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank, rank) + GLWESecret::bytes_of(n, rank)
-    }
-
-    pub fn encrypt_pk_scratch_space<B: Backend>(module: &Module<B>, _n: usize, _basek: usize, _k: usize, _rank: usize) -> usize {
-        GLWESwitchingKey::encrypt_pk_scratch_space(module, _n, _basek, _k, _rank, _rank)
-    }
-}
-
-impl<DataSelf: DataMut> AutomorphismKey<DataSelf> {
-    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        p: i64,
-        sk: &GLWESecret<DataSk>,
-        source_xa: &mut Source,
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: AutomorphismKeyEncryptSkFamily<B> + VecZnxAutomorphism + VecZnxSwithcDegree + VecZnxAddScalarInplace,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.n(), sk.n());
-            assert_eq!(self.rank_out(), self.rank_in());
-            assert_eq!(sk.rank(), self.rank());
-            assert!(
-                scratch.available()
-                    >= AutomorphismKey::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank()),
-                "scratch.available(): {} < AutomorphismKey::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
-                scratch.available(),
-                self.rank(),
-                self.size(),
-                AutomorphismKey::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank())
-            )
-        }
-
-        let (mut sk_out, scratch_1) = scratch.take_glwe_secret(sk.n(), sk.rank());
-
-        {
-            (0..self.rank()).for_each(|i| {
-                module.vec_znx_automorphism(
-                    module.galois_element_inv(p),
-                    &mut sk_out.data.as_vec_znx_mut(),
-                    i,
-                    &sk.data.as_vec_znx(),
-                    i,
-                );
-            });
-        }
-
-        self.key
-            .encrypt_sk(module, &sk, &sk_out, source_xa, source_xe, sigma, scratch_1);
-
-        self.p = p;
-    }
-}
-
-impl AutomorphismKeyCompressed<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: AutomorphismKeyEncryptSkFamily<B>,
-    {
-        GLWESwitchingKeyCompressed::encrypt_sk_scratch_space(module, n, basek, k, rank, rank) + GLWESecret::bytes_of(n, rank)
-    }
-}
-
-impl<DataSelf: DataMut> AutomorphismKeyCompressed<DataSelf> {
-    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        p: i64,
-        sk: &GLWESecret<DataSk>,
-        seed_xa: [u8; 32],
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: AutomorphismKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAutomorphism + VecZnxAddScalarInplace,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.n(), sk.n());
-            assert_eq!(self.rank_out(), self.rank_in());
-            assert_eq!(sk.rank(), self.rank());
-            assert!(
-                scratch.available()
-                    >= AutomorphismKeyCompressed::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank()),
-                "scratch.available(): {} < AutomorphismKey::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
-                scratch.available(),
-                self.rank(),
-                self.size(),
-                AutomorphismKeyCompressed::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank())
-            )
-        }
-
-        let (mut sk_out, scratch_1) = scratch.take_glwe_secret(sk.n(), sk.rank());
-
-        {
-            (0..self.rank()).for_each(|i| {
-                module.vec_znx_automorphism(
-                    module.galois_element_inv(p),
-                    &mut sk_out.data.as_vec_znx_mut(),
-                    i,
-                    &sk.data.as_vec_znx(),
-                    i,
-                );
-            });
-        }
-
-        self.key
-            .encrypt_sk(module, &sk, &sk_out, seed_xa, source_xe, sigma, scratch_1);
-
-        self.p = p;
-    }
-}
-
-pub trait GLWETensorKeyEncryptSkFamily<B: Backend> =
-    GGLWEEncryptSkFamily<B> + VecZnxBigAllocBytes + VecZnxDftToVecZnxBigTmpA<B> + SvpApply<B>;
-
-impl GLWETensorKey<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: GLWETensorKeyEncryptSkFamily<B>,
-    {
-        GLWESecretExec::bytes_of(module, n, rank)
-            + module.vec_znx_dft_alloc_bytes(n, rank, 1)
-            + module.vec_znx_big_alloc_bytes(n, 1, 1)
-            + module.vec_znx_dft_alloc_bytes(n, 1, 1)
-            + GLWESecret::bytes_of(n, 1)
-            + GLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank, rank)
-    }
-}
-
-impl<DataSelf: DataMut> GLWETensorKey<DataSelf> {
-    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        sk: &GLWESecret<DataSk>,
-        source_xa: &mut Source,
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GLWETensorKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace,
-        Scratch<B>: ScratchAvailable + TakeVecZnxDft<B> + TakeVecZnxBig<B> + TakeGLWESecretExec<B> + TakeScalarZnx + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.rank(), sk.rank());
-            assert_eq!(self.n(), sk.n());
-        }
-
-        let n: usize = sk.n();
-
-        let rank: usize = self.rank();
-
-        let (mut sk_dft_prep, scratch1) = scratch.take_glwe_secret_exec(n, rank);
-        sk_dft_prep.prepare(module, &sk);
-
-        let (mut sk_dft, scratch2) = scratch1.take_vec_znx_dft(n, rank, 1);
-
-        (0..rank).for_each(|i| {
-            module.vec_znx_dft_from_vec_znx(1, 0, &mut sk_dft, i, &sk.data.as_vec_znx(), i);
-        });
-
-        let (mut sk_ij_big, scratch3) = scratch2.take_vec_znx_big(n, 1, 1);
-        let (mut sk_ij, scratch4) = scratch3.take_glwe_secret(n, 1);
-        let (mut sk_ij_dft, scratch5) = scratch4.take_vec_znx_dft(n, 1, 1);
-
-        (0..rank).for_each(|i| {
-            (i..rank).for_each(|j| {
-                module.svp_apply(&mut sk_ij_dft, 0, &sk_dft_prep.data, j, &sk_dft, i);
-
-                module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut sk_ij_big, 0, &mut sk_ij_dft, 0);
-                module.vec_znx_big_normalize(
-                    self.basek(),
-                    &mut sk_ij.data.as_vec_znx_mut(),
-                    0,
-                    &sk_ij_big,
-                    0,
-                    scratch5,
-                );
-
-                self.at_mut(i, j)
-                    .encrypt_sk(module, &sk_ij, sk, source_xa, source_xe, sigma, scratch5);
-            });
-        })
-    }
-}
-
-impl GLWETensorKeyCompressed<Vec<u8>> {
-    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: GLWETensorKeyEncryptSkFamily<B>,
-    {
-        GLWETensorKey::encrypt_sk_scratch_space(module, n, basek, k, rank)
-    }
-}
-
-impl<DataSelf: DataMut> GLWETensorKeyCompressed<DataSelf> {
-    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        sk: &GLWESecret<DataSk>,
-        seed_xa: [u8; 32],
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        Module<B>: GLWETensorKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace,
-        Scratch<B>: ScratchAvailable + TakeVecZnxDft<B> + TakeVecZnxBig<B> + TakeGLWESecretExec<B> + TakeScalarZnx + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.rank(), sk.rank());
-            assert_eq!(self.n(), sk.n());
-        }
-
-        let n: usize = sk.n();
-        let rank: usize = self.rank();
-
-        let (mut sk_dft_prep, scratch1) = scratch.take_glwe_secret_exec(n, rank);
-        sk_dft_prep.prepare(module, &sk);
-
-        let (mut sk_dft, scratch2) = scratch1.take_vec_znx_dft(n, rank, 1);
-
-        (0..rank).for_each(|i| {
-            module.vec_znx_dft_from_vec_znx(1, 0, &mut sk_dft, i, &sk.data.as_vec_znx(), i);
-        });
-
-        let (mut sk_ij_big, scratch3) = scratch2.take_vec_znx_big(n, 1, 1);
-        let (mut sk_ij, scratch4) = scratch3.take_glwe_secret(n, 1);
-        let (mut sk_ij_dft, scratch5) = scratch4.take_vec_znx_dft(n, 1, 1);
-
-        let mut source_xa: Source = Source::new(seed_xa);
-
-        (0..rank).for_each(|i| {
-            (i..rank).for_each(|j| {
-                module.svp_apply(&mut sk_ij_dft, 0, &sk_dft_prep.data, j, &sk_dft, i);
-
-                module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut sk_ij_big, 0, &mut sk_ij_dft, 0);
-                module.vec_znx_big_normalize(
-                    self.basek(),
-                    &mut sk_ij.data.as_vec_znx_mut(),
-                    0,
-                    &sk_ij_big,
-                    0,
-                    scratch5,
-                );
-
-                let (seed_xa_tmp, _) = source_xa.branch();
-
-                self.at_mut(i, j)
-                    .encrypt_sk(module, &sk_ij, sk, seed_xa_tmp, source_xe, sigma, scratch5);
-            });
-        })
-    }
-}

core/src/gglwe/layout.rs

@@ -1,541 +0,0 @@
-use backend::hal::{
-    api::{FillUniform, Reset, VmpPMatAlloc, VmpPMatAllocBytes, VmpPMatPrepare},
-    layouts::{Backend, Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
-};
-
-use crate::{GLWECiphertext, Infos};
-use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
-
-pub trait GGLWEExecLayoutFamily<B: Backend> = VmpPMatAlloc<B> + VmpPMatAllocBytes + VmpPMatPrepare<B>;
-use std::fmt;
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct GGLWECiphertext<D: Data> {
-    pub(crate) data: MatZnx<D>,
-    pub(crate) basek: usize,
-    pub(crate) k: usize,
-    pub(crate) digits: usize,
-}
-
-impl<D: DataRef> fmt::Debug for GGLWECiphertext<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataMut> FillUniform for GGLWECiphertext<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.data.fill_uniform(source);
-    }
-}
-
-impl<D: DataMut> Reset for GGLWECiphertext<D> {
-    fn reset(&mut self) {
-        self.data.reset();
-        self.basek = 0;
-        self.k = 0;
-        self.digits = 0;
-    }
-}
-
-impl<D: DataRef> fmt::Display for GGLWECiphertext<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "(GGLWECiphertext: basek={} k={} digits={}) {}",
-            self.basek, self.k, self.digits, self.data
-        )
-    }
-}
-
-impl<D: DataRef> GGLWECiphertext<D> {
-    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
-        GLWECiphertext {
-            data: self.data.at(row, col),
-            basek: self.basek,
-            k: self.k,
-        }
-    }
-}
-
-impl<D: DataMut> GGLWECiphertext<D> {
-    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
-        GLWECiphertext {
-            data: self.data.at_mut(row, col),
-            basek: self.basek,
-            k: self.k,
-        }
-    }
-}
-
-impl GGLWECiphertext<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
-        let size: usize = k.div_ceil(basek);
-        debug_assert!(
-            size > digits,
-            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
-            size,
-            digits
-        );
-
-        assert!(
-            rows * digits <= size,
-            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
-            rows,
-            digits,
-            size
-        );
-
-        Self {
-            data: MatZnx::alloc(n, rows, rank_in, rank_out + 1, size),
-            basek: basek,
-            k,
-            digits,
-        }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> usize {
-        let size: usize = k.div_ceil(basek);
-        debug_assert!(
-            size > digits,
-            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
-            size,
-            digits
-        );
-
-        assert!(
-            rows * digits <= size,
-            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
-            rows,
-            digits,
-            size
-        );
-
-        MatZnx::alloc_bytes(n, rows, rank_in, rank_out + 1, rows)
-    }
-}
-
-impl<D: Data> Infos for GGLWECiphertext<D> {
-    type Inner = MatZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.data
-    }
-
-    fn basek(&self) -> usize {
-        self.basek
-    }
-
-    fn k(&self) -> usize {
-        self.k
-    }
-}
-
-impl<D: Data> GGLWECiphertext<D> {
-    pub fn rank(&self) -> usize {
-        self.data.cols_out() - 1
-    }
-
-    pub fn digits(&self) -> usize {
-        self.digits
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.data.cols_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.data.cols_out() - 1
-    }
-}
-
-impl<D: DataMut> ReaderFrom for GGLWECiphertext<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        self.k = reader.read_u64::<LittleEndian>()? as usize;
-        self.basek = reader.read_u64::<LittleEndian>()? as usize;
-        self.digits = reader.read_u64::<LittleEndian>()? as usize;
-        self.data.read_from(reader)
-    }
-}
-
-impl<D: DataRef> WriterTo for GGLWECiphertext<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.k as u64)?;
-        writer.write_u64::<LittleEndian>(self.basek as u64)?;
-        writer.write_u64::<LittleEndian>(self.digits as u64)?;
-        self.data.write_to(writer)
-    }
-}
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct GLWESwitchingKey<D: Data> {
-    pub(crate) key: GGLWECiphertext<D>,
-    pub(crate) sk_in_n: usize,  // Degree of sk_in
-    pub(crate) sk_out_n: usize, // Degree of sk_out
-}
-
-impl<D: DataRef> fmt::Debug for GLWESwitchingKey<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataRef> fmt::Display for GLWESwitchingKey<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "(GLWESwitchingKey: sk_in_n={} sk_out_n={}) {}",
-            self.sk_in_n, self.sk_out_n, self.key.data
-        )
-    }
-}
-
-impl<D: DataMut> FillUniform for GLWESwitchingKey<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.key.fill_uniform(source);
-    }
-}
-
-impl<D: DataMut> Reset for GLWESwitchingKey<D>
-where
-    MatZnx<D>: Reset,
-{
-    fn reset(&mut self) {
-        self.key.reset();
-        self.sk_in_n = 0;
-        self.sk_out_n = 0;
-    }
-}
-
-impl GLWESwitchingKey<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
-        GLWESwitchingKey {
-            key: GGLWECiphertext::alloc(n, basek, k, rows, digits, rank_in, rank_out),
-            sk_in_n: 0,
-            sk_out_n: 0,
-        }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> usize {
-        GGLWECiphertext::<Vec<u8>>::bytes_of(n, basek, k, rows, digits, rank_in, rank_out)
-    }
-}
-
-impl<D: Data> Infos for GLWESwitchingKey<D> {
-    type Inner = MatZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        self.key.inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.key.basek()
-    }
-
-    fn k(&self) -> usize {
-        self.key.k()
-    }
-}
-
-impl<D: Data> GLWESwitchingKey<D> {
-    pub fn rank(&self) -> usize {
-        self.key.data.cols_out() - 1
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.key.data.cols_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.key.data.cols_out() - 1
-    }
-
-    pub fn digits(&self) -> usize {
-        self.key.digits()
-    }
-
-    pub fn sk_degree_in(&self) -> usize {
-        self.sk_in_n
-    }
-
-    pub fn sk_degree_out(&self) -> usize {
-        self.sk_out_n
-    }
-}
-
-impl<D: DataRef> GLWESwitchingKey<D> {
-    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
-        self.key.at(row, col)
-    }
-}
-
-impl<D: DataMut> GLWESwitchingKey<D> {
-    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
-        self.key.at_mut(row, col)
-    }
-}
-
-impl<D: DataMut> ReaderFrom for GLWESwitchingKey<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        self.sk_in_n = reader.read_u64::<LittleEndian>()? as usize;
-        self.sk_out_n = reader.read_u64::<LittleEndian>()? as usize;
-        self.key.read_from(reader)
-    }
-}
-
-impl<D: DataRef> WriterTo for GLWESwitchingKey<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.sk_in_n as u64)?;
-        writer.write_u64::<LittleEndian>(self.sk_out_n as u64)?;
-        self.key.write_to(writer)
-    }
-}
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct AutomorphismKey<D: Data> {
-    pub(crate) key: GLWESwitchingKey<D>,
-    pub(crate) p: i64,
-}
-
-impl<D: DataRef> fmt::Debug for AutomorphismKey<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataMut> FillUniform for AutomorphismKey<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.key.fill_uniform(source);
-    }
-}
-
-impl<D: DataMut> Reset for AutomorphismKey<D>
-where
-    MatZnx<D>: Reset,
-{
-    fn reset(&mut self) {
-        self.key.reset();
-        self.p = 0;
-    }
-}
-
-impl<D: DataRef> fmt::Display for AutomorphismKey<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "(AutomorphismKey: p={}) {}", self.p, self.key)
-    }
-}
-
-impl AutomorphismKey<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
-        AutomorphismKey {
-            key: GLWESwitchingKey::alloc(n, basek, k, rows, digits, rank, rank),
-            p: 0,
-        }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
-        GLWESwitchingKey::bytes_of(n, basek, k, rows, digits, rank, rank)
-    }
-}
-
-impl<D: Data> Infos for AutomorphismKey<D> {
-    type Inner = MatZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.key.inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.key.basek()
-    }
-
-    fn k(&self) -> usize {
-        self.key.k()
-    }
-}
-
-impl<D: Data> AutomorphismKey<D> {
-    pub fn p(&self) -> i64 {
-        self.p
-    }
-
-    pub fn digits(&self) -> usize {
-        self.key.digits()
-    }
-
-    pub fn rank(&self) -> usize {
-        self.key.rank()
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.key.rank_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.key.rank_out()
-    }
-}
-
-impl<D: DataRef> AutomorphismKey<D> {
-    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
-        self.key.at(row, col)
-    }
-}
-
-impl<D: DataMut> AutomorphismKey<D> {
-    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
-        self.key.at_mut(row, col)
-    }
-}
-
-impl<D: DataMut> ReaderFrom for AutomorphismKey<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        self.p = reader.read_u64::<LittleEndian>()? as i64;
-        self.key.read_from(reader)
-    }
-}
-
-impl<D: DataRef> WriterTo for AutomorphismKey<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.p as u64)?;
-        self.key.write_to(writer)
-    }
-}
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct GLWETensorKey<D: Data> {
-    pub(crate) keys: Vec<GLWESwitchingKey<D>>,
-}
-
-impl<D: DataRef> fmt::Debug for GLWETensorKey<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataMut> FillUniform for GLWETensorKey<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.keys
-            .iter_mut()
-            .for_each(|key: &mut GLWESwitchingKey<D>| key.fill_uniform(source))
-    }
-}
-
-impl<D: DataMut> Reset for GLWETensorKey<D>
-where
-    MatZnx<D>: Reset,
-{
-    fn reset(&mut self) {
-        self.keys
-            .iter_mut()
-            .for_each(|key: &mut GLWESwitchingKey<D>| key.reset())
-    }
-}
-
-impl<D: DataRef> fmt::Display for GLWETensorKey<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        writeln!(f, "(GLWETensorKey)",)?;
-        for (i, key) in self.keys.iter().enumerate() {
-            write!(f, "{}: {}", i, key)?;
-        }
-        Ok(())
-    }
-}
-
-impl GLWETensorKey<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
-        let mut keys: Vec<GLWESwitchingKey<Vec<u8>>> = Vec::new();
-        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
-        (0..pairs).for_each(|_| {
-            keys.push(GLWESwitchingKey::alloc(n, basek, k, rows, digits, 1, rank));
-        });
-        Self { keys: keys }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
-        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
-        pairs * GLWESwitchingKey::<Vec<u8>>::bytes_of(n, basek, k, rows, digits, 1, rank)
-    }
-}
-
-impl<D: Data> Infos for GLWETensorKey<D> {
-    type Inner = MatZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.keys[0].inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.keys[0].basek()
-    }
-
-    fn k(&self) -> usize {
-        self.keys[0].k()
-    }
-}
-
-impl<D: Data> GLWETensorKey<D> {
-    pub fn rank(&self) -> usize {
-        self.keys[0].rank()
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.keys[0].rank_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.keys[0].rank_out()
-    }
-
-    pub fn digits(&self) -> usize {
-        self.keys[0].digits()
-    }
-}
-
-impl<D: DataMut> GLWETensorKey<D> {
-    // Returns a mutable reference to GLWESwitchingKey_{s}(s[i] * s[j])
-    pub fn at_mut(&mut self, mut i: usize, mut j: usize) -> &mut GLWESwitchingKey<D> {
-        if i > j {
-            std::mem::swap(&mut i, &mut j);
-        };
-        let rank: usize = self.rank();
-        &mut self.keys[i * rank + j - (i * (i + 1) / 2)]
-    }
-}
-
-impl<D: DataRef> GLWETensorKey<D> {
-    // Returns a reference to GLWESwitchingKey_{s}(s[i] * s[j])
-    pub fn at(&self, mut i: usize, mut j: usize) -> &GLWESwitchingKey<D> {
-        if i > j {
-            std::mem::swap(&mut i, &mut j);
-        };
-        let rank: usize = self.rank();
-        &self.keys[i * rank + j - (i * (i + 1) / 2)]
-    }
-}
-
-impl<D: DataMut> ReaderFrom for GLWETensorKey<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        let len: usize = reader.read_u64::<LittleEndian>()? as usize;
-        if self.keys.len() != len {
-            return Err(std::io::Error::new(
-                std::io::ErrorKind::InvalidData,
-                format!("self.keys.len()={} != read len={}", self.keys.len(), len),
-            ));
-        }
-        for key in &mut self.keys {
-            key.read_from(reader)?;
-        }
-        Ok(())
-    }
-}
-
-impl<D: DataRef> WriterTo for GLWETensorKey<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
-        for key in &self.keys {
-            key.write_to(writer)?;
-        }
-        Ok(())
-    }
-}

core/src/gglwe/layouts_compressed.rs

@@ -1,626 +0,0 @@
-use backend::hal::{
-    api::{FillUniform, Reset, VecZnxCopy, VecZnxFillUniform},
-    layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
-};
-
-use crate::{AutomorphismKey, Decompress, GGLWECiphertext, GLWECiphertextCompressed, GLWESwitchingKey, GLWETensorKey, Infos};
-use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
-use std::fmt;
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct GGLWECiphertextCompressed<D: Data> {
-    pub(crate) data: MatZnx<D>,
-    pub(crate) basek: usize,
-    pub(crate) k: usize,
-    pub(crate) rank_out: usize,
-    pub(crate) digits: usize,
-    pub(crate) seed: Vec<[u8; 32]>,
-}
-
-impl<D: DataRef> fmt::Debug for GGLWECiphertextCompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataMut> FillUniform for GGLWECiphertextCompressed<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.data.fill_uniform(source);
-    }
-}
-
-impl<D: DataMut> Reset for GGLWECiphertextCompressed<D>
-where
-    MatZnx<D>: Reset,
-{
-    fn reset(&mut self) {
-        self.data.reset();
-        self.basek = 0;
-        self.k = 0;
-        self.digits = 0;
-        self.rank_out = 0;
-        self.seed = Vec::new();
-    }
-}
-
-impl<D: DataRef> fmt::Display for GGLWECiphertextCompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "(GGLWECiphertextCompressed: basek={} k={} digits={}) {}",
-            self.basek, self.k, self.digits, self.data
-        )
-    }
-}
-
-impl GGLWECiphertextCompressed<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
-        let size: usize = k.div_ceil(basek);
-        debug_assert!(
-            size > digits,
-            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
-            size,
-            digits
-        );
-
-        assert!(
-            rows * digits <= size,
-            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
-            rows,
-            digits,
-            size
-        );
-
-        Self {
-            data: MatZnx::alloc(n, rows, rank_in, 1, size),
-            basek: basek,
-            k,
-            rank_out,
-            digits,
-            seed: vec![[0u8; 32]; rows * rank_in],
-        }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize) -> usize {
-        let size: usize = k.div_ceil(basek);
-        debug_assert!(
-            size > digits,
-            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
-            size,
-            digits
-        );
-
-        assert!(
-            rows * digits <= size,
-            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
-            rows,
-            digits,
-            size
-        );
-
-        MatZnx::alloc_bytes(n, rows, rank_in, 1, rows)
-    }
-}
-
-impl<D: Data> Infos for GGLWECiphertextCompressed<D> {
-    type Inner = MatZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.data
-    }
-
-    fn basek(&self) -> usize {
-        self.basek
-    }
-
-    fn k(&self) -> usize {
-        self.k
-    }
-}
-
-impl<D: Data> GGLWECiphertextCompressed<D> {
-    pub fn rank(&self) -> usize {
-        self.rank_out
-    }
-
-    pub fn digits(&self) -> usize {
-        self.digits
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.data.cols_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.rank_out
-    }
-}
-
-impl<D: DataRef> GGLWECiphertextCompressed<D> {
-    pub(crate) fn at(&self, row: usize, col: usize) -> GLWECiphertextCompressed<&[u8]> {
-        GLWECiphertextCompressed {
-            data: self.data.at(row, col),
-            basek: self.basek,
-            k: self.k,
-            rank: self.rank_out,
-            seed: self.seed[self.rank_in() * row + col],
-        }
-    }
-}
-
-impl<D: DataMut> GGLWECiphertextCompressed<D> {
-    pub(crate) fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertextCompressed<&mut [u8]> {
-        let rank_in: usize = self.rank_in();
-        GLWECiphertextCompressed {
-            data: self.data.at_mut(row, col),
-            basek: self.basek,
-            k: self.k,
-            rank: self.rank_out,
-            seed: self.seed[rank_in * row + col], // Warning: value is copied and not borrow mut
-        }
-    }
-}
-
-impl<D: DataMut> ReaderFrom for GGLWECiphertextCompressed<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        self.k = reader.read_u64::<LittleEndian>()? as usize;
-        self.basek = reader.read_u64::<LittleEndian>()? as usize;
-        self.digits = reader.read_u64::<LittleEndian>()? as usize;
-        self.rank_out = reader.read_u64::<LittleEndian>()? as usize;
-        let seed_len = reader.read_u64::<LittleEndian>()? as usize;
-        self.seed = vec![[0u8; 32]; seed_len];
-        for s in &mut self.seed {
-            reader.read_exact(s)?;
-        }
-        self.data.read_from(reader)
-    }
-}
-
-impl<D: DataRef> WriterTo for GGLWECiphertextCompressed<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.k as u64)?;
-        writer.write_u64::<LittleEndian>(self.basek as u64)?;
-        writer.write_u64::<LittleEndian>(self.digits as u64)?;
-        writer.write_u64::<LittleEndian>(self.rank_out as u64)?;
-        writer.write_u64::<LittleEndian>(self.seed.len() as u64)?;
-        for s in &self.seed {
-            writer.write_all(s)?;
-        }
-        self.data.write_to(writer)
-    }
-}
-
-impl<D: DataMut, B: Backend, DR: DataRef> Decompress<B, GGLWECiphertextCompressed<DR>> for GGLWECiphertext<D> {
-    fn decompress(&mut self, module: &Module<B>, other: &GGLWECiphertextCompressed<DR>)
-    where
-        Module<B>: VecZnxFillUniform + VecZnxCopy,
-    {
-        #[cfg(debug_assertions)]
-        {
-            use backend::hal::api::ZnxInfos;
-
-            assert_eq!(
-                self.n(),
-                other.data.n(),
-                "invalid receiver: self.n()={} != other.n()={}",
-                self.n(),
-                other.data.n()
-            );
-            assert_eq!(
-                self.size(),
-                other.size(),
-                "invalid receiver: self.size()={} != other.size()={}",
-                self.size(),
-                other.size()
-            );
-            assert_eq!(
-                self.rank_in(),
-                other.rank_in(),
-                "invalid receiver: self.rank_in()={} != other.rank_in()={}",
-                self.rank_in(),
-                other.rank_in()
-            );
-            assert_eq!(
-                self.rank_out(),
-                other.rank_out(),
-                "invalid receiver: self.rank_out()={} != other.rank_out()={}",
-                self.rank_out(),
-                other.rank_out()
-            );
-
-            assert_eq!(
-                self.rows(),
-                other.rows(),
-                "invalid receiver: self.rows()={} != other.rows()={}",
-                self.rows(),
-                other.rows()
-            );
-        }
-
-        let rank_in: usize = self.rank_in();
-        let rows: usize = self.rows();
-
-        (0..rank_in).for_each(|col_i| {
-            (0..rows).for_each(|row_i| {
-                self.at_mut(row_i, col_i)
-                    .decompress(module, &other.at(row_i, col_i));
-            });
-        });
-    }
-}
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct GLWESwitchingKeyCompressed<D: Data> {
-    pub(crate) key: GGLWECiphertextCompressed<D>,
-    pub(crate) sk_in_n: usize,  // Degree of sk_in
-    pub(crate) sk_out_n: usize, // Degree of sk_out
-}
-
-impl<D: DataRef> fmt::Debug for GLWESwitchingKeyCompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataMut> FillUniform for GLWESwitchingKeyCompressed<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.key.fill_uniform(source);
-    }
-}
-
-impl<D: DataMut> Reset for GLWESwitchingKeyCompressed<D>
-where
-    MatZnx<D>: Reset,
-{
-    fn reset(&mut self) {
-        self.key.reset();
-        self.sk_in_n = 0;
-        self.sk_out_n = 0;
-    }
-}
-
-impl<D: DataRef> fmt::Display for GLWESwitchingKeyCompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "(GLWESwitchingKeyCompressed: sk_in_n={} sk_out_n={}) {}",
-            self.sk_in_n, self.sk_out_n, self.key.data
-        )
-    }
-}
-
-impl<D: Data> Infos for GLWESwitchingKeyCompressed<D> {
-    type Inner = MatZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.key.inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.key.basek()
-    }
-
-    fn k(&self) -> usize {
-        self.key.k()
-    }
-}
-
-impl<D: Data> GLWESwitchingKeyCompressed<D> {
-    pub fn rank(&self) -> usize {
-        self.key.rank()
-    }
-
-    pub fn digits(&self) -> usize {
-        self.key.digits()
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.key.rank_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.key.rank_out()
-    }
-}
-
-impl GLWESwitchingKeyCompressed<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
-        GLWESwitchingKeyCompressed {
-            key: GGLWECiphertextCompressed::alloc(n, basek, k, rows, digits, rank_in, rank_out),
-            sk_in_n: 0,
-            sk_out_n: 0,
-        }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize) -> usize {
-        GGLWECiphertextCompressed::bytes_of(n, basek, k, rows, digits, rank_in)
-    }
-}
-
-impl<D: DataMut> ReaderFrom for GLWESwitchingKeyCompressed<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        self.sk_in_n = reader.read_u64::<LittleEndian>()? as usize;
-        self.sk_out_n = reader.read_u64::<LittleEndian>()? as usize;
-        self.key.read_from(reader)
-    }
-}
-
-impl<D: DataRef> WriterTo for GLWESwitchingKeyCompressed<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.sk_in_n as u64)?;
-        writer.write_u64::<LittleEndian>(self.sk_out_n as u64)?;
-        self.key.write_to(writer)
-    }
-}
-
-impl<D: DataMut> GLWESwitchingKey<D> {
-    pub fn decompress<DataOther: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        other: &GLWESwitchingKeyCompressed<DataOther>,
-    ) where
-        Module<B>: VecZnxFillUniform + VecZnxCopy,
-    {
-        self.key.decompress(module, &other.key);
-        self.sk_in_n = other.sk_in_n;
-        self.sk_out_n = other.sk_out_n;
-    }
-}
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct AutomorphismKeyCompressed<D: Data> {
-    pub(crate) key: GLWESwitchingKeyCompressed<D>,
-    pub(crate) p: i64,
-}
-
-impl<D: DataRef> fmt::Debug for AutomorphismKeyCompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataMut> FillUniform for AutomorphismKeyCompressed<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.key.fill_uniform(source);
-    }
-}
-
-impl<D: DataMut> Reset for AutomorphismKeyCompressed<D>
-where
-    MatZnx<D>: Reset,
-{
-    fn reset(&mut self) {
-        self.key.reset();
-        self.p = 0;
-    }
-}
-
-impl<D: DataRef> fmt::Display for AutomorphismKeyCompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "(AutomorphismKeyCompressed: p={}) {}", self.p, self.key)
-    }
-}
-
-impl AutomorphismKeyCompressed<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
-        AutomorphismKeyCompressed {
-            key: GLWESwitchingKeyCompressed::alloc(n, basek, k, rows, digits, rank, rank),
-            p: 0,
-        }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
-        GLWESwitchingKeyCompressed::<Vec<u8>>::bytes_of(n, basek, k, rows, digits, rank)
-    }
-}
-
-impl<D: Data> Infos for AutomorphismKeyCompressed<D> {
-    type Inner = MatZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.key.inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.key.basek()
-    }
-
-    fn k(&self) -> usize {
-        self.key.k()
-    }
-}
-
-impl<D: Data> AutomorphismKeyCompressed<D> {
-    pub fn rank(&self) -> usize {
-        self.key.rank()
-    }
-
-    pub fn digits(&self) -> usize {
-        self.key.digits()
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.key.rank_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.key.rank_out()
-    }
-}
-
-impl<D: DataMut> ReaderFrom for AutomorphismKeyCompressed<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        self.p = reader.read_u64::<LittleEndian>()? as i64;
-        self.key.read_from(reader)
-    }
-}
-
-impl<D: DataRef> WriterTo for AutomorphismKeyCompressed<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.p as u64)?;
-        self.key.write_to(writer)
-    }
-}
-
-impl<D: DataMut> AutomorphismKey<D> {
-    pub fn decompress<DataOther: DataRef, B: Backend>(&mut self, module: &Module<B>, other: &AutomorphismKeyCompressed<DataOther>)
-    where
-        Module<B>: VecZnxFillUniform + VecZnxCopy,
-    {
-        self.key.decompress(module, &other.key);
-        self.p = other.p;
-    }
-}
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct GLWETensorKeyCompressed<D: Data> {
-    pub(crate) keys: Vec<GLWESwitchingKeyCompressed<D>>,
-}
-
-impl<D: DataRef> fmt::Debug for GLWETensorKeyCompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataMut> FillUniform for GLWETensorKeyCompressed<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.keys
-            .iter_mut()
-            .for_each(|key: &mut GLWESwitchingKeyCompressed<D>| key.fill_uniform(source))
-    }
-}
-
-impl<D: DataMut> Reset for GLWETensorKeyCompressed<D>
-where
-    MatZnx<D>: Reset,
-{
-    fn reset(&mut self) {
-        self.keys
-            .iter_mut()
-            .for_each(|key: &mut GLWESwitchingKeyCompressed<D>| key.reset())
-    }
-}
-
-impl<D: DataRef> fmt::Display for GLWETensorKeyCompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        writeln!(f, "(GLWETensorKeyCompressed)",)?;
-        for (i, key) in self.keys.iter().enumerate() {
-            write!(f, "{}: {}", i, key)?;
-        }
-        Ok(())
-    }
-}
-
-impl GLWETensorKeyCompressed<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
-        let mut keys: Vec<GLWESwitchingKeyCompressed<Vec<u8>>> = Vec::new();
-        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
-        (0..pairs).for_each(|_| {
-            keys.push(GLWESwitchingKeyCompressed::alloc(
-                n, basek, k, rows, digits, 1, rank,
-            ));
-        });
-        Self { keys: keys }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
-        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
-        pairs * GLWESwitchingKeyCompressed::bytes_of(n, basek, k, rows, digits, 1)
-    }
-}
-
-impl<D: Data> Infos for GLWETensorKeyCompressed<D> {
-    type Inner = MatZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.keys[0].inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.keys[0].basek()
-    }
-
-    fn k(&self) -> usize {
-        self.keys[0].k()
-    }
-}
-
-impl<D: Data> GLWETensorKeyCompressed<D> {
-    pub fn rank(&self) -> usize {
-        self.keys[0].rank()
-    }
-
-    pub fn digits(&self) -> usize {
-        self.keys[0].digits()
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.keys[0].rank_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.keys[0].rank_out()
-    }
-}
-
-impl<D: DataMut> ReaderFrom for GLWETensorKeyCompressed<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        let len: usize = reader.read_u64::<LittleEndian>()? as usize;
-        if self.keys.len() != len {
-            return Err(std::io::Error::new(
-                std::io::ErrorKind::InvalidData,
-                format!("self.keys.len()={} != read len={}", self.keys.len(), len),
-            ));
-        }
-        for key in &mut self.keys {
-            key.read_from(reader)?;
-        }
-        Ok(())
-    }
-}
-
-impl<D: DataRef> WriterTo for GLWETensorKeyCompressed<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
-        for key in &self.keys {
-            key.write_to(writer)?;
-        }
-        Ok(())
-    }
-}
-
-impl<D: DataMut> GLWETensorKeyCompressed<D> {
-    pub(crate) fn at_mut(&mut self, mut i: usize, mut j: usize) -> &mut GLWESwitchingKeyCompressed<D> {
-        if i > j {
-            std::mem::swap(&mut i, &mut j);
-        };
-        let rank: usize = self.rank();
-        &mut self.keys[i * rank + j - (i * (i + 1) / 2)]
-    }
-}
-
-impl<D: DataMut> GLWETensorKey<D> {
-    pub fn decompress<DataOther: DataRef, B: Backend>(&mut self, module: &Module<B>, other: &GLWETensorKeyCompressed<DataOther>)
-    where
-        Module<B>: VecZnxFillUniform + VecZnxCopy,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(
-                self.keys.len(),
-                other.keys.len(),
-                "invalid receiver: self.keys.len()={} != other.keys.len()={}",
-                self.keys.len(),
-                other.keys.len()
-            );
-        }
-
-        self.keys
-            .iter_mut()
-            .zip(other.keys.iter())
-            .for_each(|(a, b)| {
-                a.decompress(module, b);
-            });
-    }
-}

core/src/gglwe/layouts_exec.rs

@@ -1,465 +0,0 @@
-use backend::hal::{
-    api::{VmpPMatAlloc, VmpPMatAllocBytes, VmpPMatPrepare},
-    layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
-};
-
-use crate::{AutomorphismKey, GGLWECiphertext, GGLWEExecLayoutFamily, GLWESwitchingKey, GLWETensorKey, Infos};
-
-#[derive(PartialEq, Eq)]
-pub struct GGLWECiphertextExec<D: Data, B: Backend> {
-    pub(crate) data: VmpPMat<D, B>,
-    pub(crate) basek: usize,
-    pub(crate) k: usize,
-    pub(crate) digits: usize,
-}
-
-impl<B: Backend> GGLWECiphertextExec<Vec<u8>, B> {
-    pub fn alloc(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k: usize,
-        rows: usize,
-        digits: usize,
-        rank_in: usize,
-        rank_out: usize,
-    ) -> Self
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        let size: usize = k.div_ceil(basek);
-        debug_assert!(
-            size > digits,
-            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
-            size,
-            digits
-        );
-
-        assert!(
-            rows * digits <= size,
-            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
-            rows,
-            digits,
-            size
-        );
-
-        Self {
-            data: module.vmp_pmat_alloc(n, rows, rank_in, rank_out + 1, size),
-            basek: basek,
-            k,
-            digits,
-        }
-    }
-
-    pub fn bytes_of(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k: usize,
-        rows: usize,
-        digits: usize,
-        rank_in: usize,
-        rank_out: usize,
-    ) -> usize
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        let size: usize = k.div_ceil(basek);
-        debug_assert!(
-            size > digits,
-            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
-            size,
-            digits
-        );
-
-        assert!(
-            rows * digits <= size,
-            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
-            rows,
-            digits,
-            size
-        );
-
-        module.vmp_pmat_alloc_bytes(n, rows, rank_in, rank_out + 1, rows)
-    }
-}
-
-impl<D: Data, B: Backend> Infos for GGLWECiphertextExec<D, B> {
-    type Inner = VmpPMat<D, B>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.data
-    }
-
-    fn basek(&self) -> usize {
-        self.basek
-    }
-
-    fn k(&self) -> usize {
-        self.k
-    }
-}
-
-impl<D: Data, B: Backend> GGLWECiphertextExec<D, B> {
-    pub fn rank(&self) -> usize {
-        self.data.cols_out() - 1
-    }
-
-    pub fn digits(&self) -> usize {
-        self.digits
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.data.cols_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.data.cols_out() - 1
-    }
-}
-
-impl<D: DataMut, B: Backend> GGLWECiphertextExec<D, B> {
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GGLWECiphertext<DataOther>, scratch: &mut Scratch<B>)
-    where
-        DataOther: DataRef,
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        module.vmp_prepare(&mut self.data, &other.data, scratch);
-        self.basek = other.basek;
-        self.k = other.k;
-        self.digits = other.digits;
-    }
-}
-
-#[derive(PartialEq, Eq)]
-pub struct GLWESwitchingKeyExec<D: Data, B: Backend> {
-    pub(crate) key: GGLWECiphertextExec<D, B>,
-    pub(crate) sk_in_n: usize,  // Degree of sk_in
-    pub(crate) sk_out_n: usize, // Degree of sk_out
-}
-
-impl<B: Backend> GLWESwitchingKeyExec<Vec<u8>, B> {
-    pub fn alloc(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k: usize,
-        rows: usize,
-        digits: usize,
-        rank_in: usize,
-        rank_out: usize,
-    ) -> Self
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        GLWESwitchingKeyExec::<Vec<u8>, B> {
-            key: GGLWECiphertextExec::alloc(module, n, basek, k, rows, digits, rank_in, rank_out),
-            sk_in_n: 0,
-            sk_out_n: 0,
-        }
-    }
-
-    pub fn bytes_of(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k: usize,
-        rows: usize,
-        digits: usize,
-        rank_in: usize,
-        rank_out: usize,
-    ) -> usize
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        GGLWECiphertextExec::bytes_of(module, n, basek, k, rows, digits, rank_in, rank_out)
-    }
-
-    pub fn from<DataOther: DataRef>(module: &Module<B>, other: &GLWESwitchingKey<DataOther>, scratch: &mut Scratch<B>) -> Self
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        let mut ksk_exec: GLWESwitchingKeyExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.n(),
-            other.basek(),
-            other.k(),
-            other.rows(),
-            other.digits(),
-            other.rank_in(),
-            other.rank_out(),
-        );
-        ksk_exec.prepare(module, other, scratch);
-        ksk_exec
-    }
-}
-
-impl<D: Data, B: Backend> Infos for GLWESwitchingKeyExec<D, B> {
-    type Inner = VmpPMat<D, B>;
-
-    fn inner(&self) -> &Self::Inner {
-        self.key.inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.key.basek()
-    }
-
-    fn k(&self) -> usize {
-        self.key.k()
-    }
-}
-
-impl<D: Data, B: Backend> GLWESwitchingKeyExec<D, B> {
-    pub fn rank(&self) -> usize {
-        self.key.data.cols_out() - 1
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.key.data.cols_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.key.data.cols_out() - 1
-    }
-
-    pub fn digits(&self) -> usize {
-        self.key.digits()
-    }
-
-    pub fn sk_degree_in(&self) -> usize {
-        self.sk_in_n
-    }
-
-    pub fn sk_degree_out(&self) -> usize {
-        self.sk_out_n
-    }
-}
-
-impl<D: DataMut, B: Backend> GLWESwitchingKeyExec<D, B> {
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GLWESwitchingKey<DataOther>, scratch: &mut Scratch<B>)
-    where
-        DataOther: DataRef,
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        self.key.prepare(module, &other.key, scratch);
-        self.sk_in_n = other.sk_in_n;
-        self.sk_out_n = other.sk_out_n;
-    }
-}
-
-#[derive(PartialEq, Eq)]
-pub struct AutomorphismKeyExec<D: Data, B: Backend> {
-    pub(crate) key: GLWESwitchingKeyExec<D, B>,
-    pub(crate) p: i64,
-}
-
-impl<B: Backend> AutomorphismKeyExec<Vec<u8>, B> {
-    pub fn alloc(module: &Module<B>, n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        AutomorphismKeyExec::<Vec<u8>, B> {
-            key: GLWESwitchingKeyExec::alloc(module, n, basek, k, rows, digits, rank, rank),
-            p: 0,
-        }
-    }
-
-    pub fn bytes_of(module: &Module<B>, n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        GLWESwitchingKeyExec::bytes_of(module, n, basek, k, rows, digits, rank, rank)
-    }
-
-    pub fn from<DataOther: DataRef>(module: &Module<B>, other: &AutomorphismKey<DataOther>, scratch: &mut Scratch<B>) -> Self
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        let mut atk_exec: AutomorphismKeyExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.n(),
-            other.basek(),
-            other.k(),
-            other.rows(),
-            other.digits(),
-            other.rank(),
-        );
-        atk_exec.prepare(module, other, scratch);
-        atk_exec
-    }
-}
-
-impl<D: DataMut, B: Backend> AutomorphismKeyExec<D, B> {
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &AutomorphismKey<DataOther>, scratch: &mut Scratch<B>)
-    where
-        DataOther: DataRef,
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        self.key.prepare(module, &other.key, scratch);
-        self.p = other.p;
-    }
-}
-
-impl<D: Data, B: Backend> Infos for AutomorphismKeyExec<D, B> {
-    type Inner = VmpPMat<D, B>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.key.inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.key.basek()
-    }
-
-    fn k(&self) -> usize {
-        self.key.k()
-    }
-}
-
-impl<D: Data, B: Backend> AutomorphismKeyExec<D, B> {
-    pub fn p(&self) -> i64 {
-        self.p
-    }
-
-    pub fn digits(&self) -> usize {
-        self.key.digits()
-    }
-
-    pub fn rank(&self) -> usize {
-        self.key.rank()
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.key.rank_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.key.rank_out()
-    }
-}
-
-#[derive(PartialEq, Eq)]
-pub struct GLWETensorKeyExec<D: Data, B: Backend> {
-    pub(crate) keys: Vec<GLWESwitchingKeyExec<D, B>>,
-}
-
-impl<B: Backend> GLWETensorKeyExec<Vec<u8>, B> {
-    pub fn alloc(module: &Module<B>, n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        let mut keys: Vec<GLWESwitchingKeyExec<Vec<u8>, B>> = Vec::new();
-        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
-        (0..pairs).for_each(|_| {
-            keys.push(GLWESwitchingKeyExec::alloc(
-                module, n, basek, k, rows, digits, 1, rank,
-            ));
-        });
-        Self { keys }
-    }
-
-    pub fn bytes_of(module: &Module<B>, n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
-        pairs * GLWESwitchingKeyExec::bytes_of(module, n, basek, k, rows, digits, 1, rank)
-    }
-
-    pub fn from<D: DataRef>(
-        module: &Module<B>,
-        other: &GLWETensorKey<D>,
-        scratch: &mut Scratch<B>,
-    ) -> GLWETensorKeyExec<Vec<u8>, B>
-    where
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        let mut tsk_exec: GLWETensorKeyExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.n(),
-            other.basek(),
-            other.k(),
-            other.rows(),
-            other.digits(),
-            other.rank(),
-        );
-        tsk_exec.prepare(module, other, scratch);
-        tsk_exec
-    }
-}
-
-impl<D: Data, B: Backend> Infos for GLWETensorKeyExec<D, B> {
-    type Inner = VmpPMat<D, B>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.keys[0].inner()
-    }
-
-    fn basek(&self) -> usize {
-        self.keys[0].basek()
-    }
-
-    fn k(&self) -> usize {
-        self.keys[0].k()
-    }
-}
-
-impl<D: Data, B: Backend> GLWETensorKeyExec<D, B> {
-    pub fn rank(&self) -> usize {
-        self.keys[0].rank()
-    }
-
-    pub fn rank_in(&self) -> usize {
-        self.keys[0].rank_in()
-    }
-
-    pub fn rank_out(&self) -> usize {
-        self.keys[0].rank_out()
-    }
-
-    pub fn digits(&self) -> usize {
-        self.keys[0].digits()
-    }
-}
-
-impl<D: DataMut, B: Backend> GLWETensorKeyExec<D, B> {
-    // Returns a mutable reference to GLWESwitchingKey_{s}(s[i] * s[j])
-    pub fn at_mut(&mut self, mut i: usize, mut j: usize) -> &mut GLWESwitchingKeyExec<D, B> {
-        if i > j {
-            std::mem::swap(&mut i, &mut j);
-        };
-        let rank: usize = self.rank();
-        &mut self.keys[i * rank + j - (i * (i + 1) / 2)]
-    }
-}
-
-impl<D: DataRef, B: Backend> GLWETensorKeyExec<D, B> {
-    // Returns a reference to GLWESwitchingKey_{s}(s[i] * s[j])
-    pub fn at(&self, mut i: usize, mut j: usize) -> &GLWESwitchingKeyExec<D, B> {
-        if i > j {
-            std::mem::swap(&mut i, &mut j);
-        };
-        let rank: usize = self.rank();
-        &self.keys[i * rank + j - (i * (i + 1) / 2)]
-    }
-}
-
-impl<D: DataMut, B: Backend> GLWETensorKeyExec<D, B> {
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GLWETensorKey<DataOther>, scratch: &mut Scratch<B>)
-    where
-        DataOther: DataRef,
-        Module<B>: GGLWEExecLayoutFamily<B>,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.keys.len(), other.keys.len());
-        }
-        self.keys
-            .iter_mut()
-            .zip(other.keys.iter())
-            .for_each(|(a, b)| {
-                a.prepare(module, b, scratch);
-            });
-    }
-}

core/src/gglwe/mod.rs

@@ -1,16 +0,0 @@
-mod automorphism;
-mod encryption;
-mod external_product;
-mod keyswitch;
-mod layout;
-mod layouts_compressed;
-mod layouts_exec;
-mod noise;
-
-pub use encryption::*;
-pub use layout::*;
-pub use layouts_compressed::*;
-pub use layouts_exec::*;
-
-#[cfg(test)]
-mod tests;

core/src/gglwe/tests/generic_serialization.rs

@@ -1,54 +0,0 @@
-use backend::hal::tests::serialization::test_reader_writer_interface;
-
-use crate::{
-    AutomorphismKey, AutomorphismKeyCompressed, GGLWECiphertext, GGLWECiphertextCompressed, GLWESwitchingKey,
-    GLWESwitchingKeyCompressed, GLWETensorKey, GLWETensorKeyCompressed,
-};
-
-#[test]
-fn test_gglwe_serialization() {
-    let original: GGLWECiphertext<Vec<u8>> = GGLWECiphertext::alloc(1024, 12, 54, 3, 1, 2, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_gglwe_compressed_serialization() {
-    let original: GGLWECiphertextCompressed<Vec<u8>> = GGLWECiphertextCompressed::alloc(1024, 12, 54, 3, 1, 2, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_glwe_switching_key_serialization() {
-    let original: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(1024, 12, 54, 3, 1, 2, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_glwe_switching_key_compressed_serialization() {
-    let original: GLWESwitchingKeyCompressed<Vec<u8>> = GLWESwitchingKeyCompressed::alloc(1024, 12, 54, 3, 1, 2, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_automorphism_key_serialization() {
-    let original: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(1024, 12, 54, 3, 1, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_automorphism_key_compressed_serialization() {
-    let original: AutomorphismKeyCompressed<Vec<u8>> = AutomorphismKeyCompressed::alloc(1024, 12, 54, 3, 1, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_tensor_key_serialization() {
-    let original: GLWETensorKey<Vec<u8>> = GLWETensorKey::alloc(1024, 12, 54, 3, 1, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_tensor_key_compressed_serialization() {
-    let original: GLWETensorKeyCompressed<Vec<u8>> = GLWETensorKeyCompressed::alloc(1024, 12, 54, 3, 1, 2);
-    test_reader_writer_interface(original);
-}

core/src/gglwe/tests/generics_gglwe.rs

@@ -1,578 +0,0 @@
-use backend::hal::{
-    api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxRotateInplace, VecZnxStd,
-        VecZnxSubScalarInplace, VecZnxSwithcDegree, ZnxViewMut,
-    },
-    layouts::{Backend, Module, ScalarZnx, ScalarZnxToMut, ScratchOwned},
-    oep::{
-        ScratchAvailableImpl, ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeScalarZnxImpl, TakeSvpPPolImpl,
-        TakeVecZnxBigImpl, TakeVecZnxDftImpl, TakeVecZnxImpl, VecZnxBigAllocBytesImpl, VecZnxDftAllocBytesImpl,
-    },
-};
-use sampling::source::Source;
-
-use crate::{
-    GGLWEEncryptSkFamily, GGLWEExecLayoutFamily, GGSWCiphertext, GGSWCiphertextExec, GGSWLayoutFamily, GLWEDecryptFamily,
-    GLWEExternalProductFamily, GLWEKeyswitchFamily, GLWESecret, GLWESecretExec, GLWESwitchingKey, GLWESwitchingKeyCompressed,
-    GLWESwitchingKeyEncryptSkFamily, GLWESwitchingKeyExec,
-    noise::{log2_std_noise_gglwe_product, noise_ggsw_product},
-};
-
-pub(crate) trait TestModuleFamily<B: Backend> = GGLWEEncryptSkFamily<B>
-    + GLWEDecryptFamily<B>
-    + VecZnxSwithcDegree
-    + VecZnxAddScalarInplace
-    + VecZnxStd
-    + VecZnxSubScalarInplace
-    + VecZnxCopy;
-
-pub(crate) trait TestScratchFamily<B: Backend> = TakeVecZnxDftImpl<B>
-    + TakeVecZnxBigImpl<B>
-    + TakeSvpPPolImpl<B>
-    + ScratchOwnedAllocImpl<B>
-    + ScratchOwnedBorrowImpl<B>
-    + ScratchAvailableImpl<B>
-    + TakeScalarZnxImpl<B>
-    + TakeVecZnxImpl<B>
-    + VecZnxDftAllocBytesImpl<B>
-    + VecZnxBigAllocBytesImpl<B>
-    + TakeSvpPPolImpl<B>;
-
-pub(crate) fn test_gglwe_encrypt_sk<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_ksk: usize,
-    digits: usize,
-    rank_in: usize,
-    rank_out: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = (k_ksk - digits * basek) / (digits * basek);
-
-    let mut ksk: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank_in, rank_out);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(GLWESwitchingKey::encrypt_sk_scratch_space(
-        module, n, basek, k_ksk, rank_in, rank_out,
-    ));
-
-    let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in);
-    sk_in.fill_ternary_prob(0.5, &mut source_xs);
-
-    let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out);
-    sk_out.fill_ternary_prob(0.5, &mut source_xs);
-    let sk_out_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_out);
-
-    ksk.encrypt_sk(
-        module,
-        &sk_in,
-        &sk_out,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    ksk.key
-        .assert_noise(module, &sk_out_exec, &sk_in.data, sigma);
-}
-
-pub(crate) fn test_gglwe_encrypt_sk_compressed<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_ksk: usize,
-    digits: usize,
-    rank_in: usize,
-    rank_out: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = (k_ksk - digits * basek) / (digits * basek);
-
-    let mut ksk_compressed: GLWESwitchingKeyCompressed<Vec<u8>> =
-        GLWESwitchingKeyCompressed::alloc(n, basek, k_ksk, rows, digits, rank_in, rank_out);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(GLWESwitchingKeyCompressed::encrypt_sk_scratch_space(
-        module, n, basek, k_ksk, rank_in, rank_out,
-    ));
-
-    let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in);
-    sk_in.fill_ternary_prob(0.5, &mut source_xs);
-
-    let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out);
-    sk_out.fill_ternary_prob(0.5, &mut source_xs);
-    let sk_out_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_out);
-
-    let seed_xa = [1u8; 32];
-
-    ksk_compressed.encrypt_sk(
-        module,
-        &sk_in,
-        &sk_out,
-        seed_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut ksk: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank_in, rank_out);
-    ksk.decompress(module, &ksk_compressed);
-
-    ksk.key
-        .assert_noise(module, &sk_out_exec, &sk_in.data, sigma);
-}
-
-pub(crate) fn test_gglwe_keyswitch<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_out: usize,
-    k_in: usize,
-    k_ksk: usize,
-    digits: usize,
-    rank_in_s0s1: usize,
-    rank_out_s0s1: usize,
-    rank_out_s1s2: usize,
-    sigma: f64,
-) where
-    Module<B>:
-        TestModuleFamily<B> + GGLWEEncryptSkFamily<B> + GLWEDecryptFamily<B> + GLWEKeyswitchFamily<B> + GGLWEExecLayoutFamily<B>,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_in.div_ceil(basek * digits);
-    let digits_in: usize = 1;
-
-    let mut ct_gglwe_s0s1: GLWESwitchingKey<Vec<u8>> =
-        GLWESwitchingKey::alloc(n, basek, k_in, rows, digits_in, rank_in_s0s1, rank_out_s0s1);
-    let mut ct_gglwe_s1s2: GLWESwitchingKey<Vec<u8>> =
-        GLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank_out_s0s1, rank_out_s1s2);
-    let mut ct_gglwe_s0s2: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(
-        n,
-        basek,
-        k_out,
-        rows,
-        digits_in,
-        rank_in_s0s1,
-        rank_out_s1s2,
-    );
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch_enc: ScratchOwned<B> = ScratchOwned::alloc(GLWESwitchingKey::encrypt_sk_scratch_space(
-        module,
-        n,
-        basek,
-        k_ksk,
-        rank_in_s0s1 | rank_out_s0s1,
-        rank_out_s0s1 | rank_out_s1s2,
-    ));
-    let mut scratch_apply: ScratchOwned<B> = ScratchOwned::alloc(GLWESwitchingKey::keyswitch_scratch_space(
-        module,
-        n,
-        basek,
-        k_out,
-        k_in,
-        k_ksk,
-        digits,
-        ct_gglwe_s1s2.rank_in(),
-        ct_gglwe_s1s2.rank_out(),
-    ));
-
-    let mut sk0: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in_s0s1);
-    sk0.fill_ternary_prob(0.5, &mut source_xs);
-
-    let mut sk1: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out_s0s1);
-    sk1.fill_ternary_prob(0.5, &mut source_xs);
-
-    let mut sk2: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out_s1s2);
-    sk2.fill_ternary_prob(0.5, &mut source_xs);
-    let sk2_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk2);
-
-    // gglwe_{s1}(s0) = s0 -> s1
-    ct_gglwe_s0s1.encrypt_sk(
-        module,
-        &sk0,
-        &sk1,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch_enc.borrow(),
-    );
-
-    // gglwe_{s2}(s1) -> s1 -> s2
-    ct_gglwe_s1s2.encrypt_sk(
-        module,
-        &sk1,
-        &sk2,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch_enc.borrow(),
-    );
-
-    let ct_gglwe_s1s2_exec: GLWESwitchingKeyExec<Vec<u8>, B> =
-        GLWESwitchingKeyExec::from(module, &ct_gglwe_s1s2, scratch_apply.borrow());
-
-    // gglwe_{s1}(s0) (x) gglwe_{s2}(s1) = gglwe_{s2}(s0)
-    ct_gglwe_s0s2.keyswitch(
-        module,
-        &ct_gglwe_s0s1,
-        &ct_gglwe_s1s2_exec,
-        scratch_apply.borrow(),
-    );
-
-    let max_noise: f64 = log2_std_noise_gglwe_product(
-        n as f64,
-        basek * digits,
-        0.5,
-        0.5,
-        0f64,
-        sigma * sigma,
-        0f64,
-        rank_out_s0s1 as f64,
-        k_in,
-        k_ksk,
-    );
-
-    ct_gglwe_s0s2
-        .key
-        .assert_noise(module, &sk2_exec, &sk0.data, max_noise + 0.5);
-}
-
-pub(crate) fn test_gglwe_keyswitch_inplace<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_ct: usize,
-    k_ksk: usize,
-    digits: usize,
-    rank_in: usize,
-    rank_out: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWEKeyswitchFamily<B>
-        + GGLWEExecLayoutFamily<B>
-        + GLWEDecryptFamily<B>,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_ct.div_ceil(basek * digits);
-    let digits_in: usize = 1;
-
-    let mut ct_gglwe_s0s1: GLWESwitchingKey<Vec<u8>> =
-        GLWESwitchingKey::alloc(n, basek, k_ct, rows, digits_in, rank_in, rank_out);
-    let mut ct_gglwe_s1s2: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank_out, rank_out);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch_enc: ScratchOwned<B> = ScratchOwned::alloc(GLWESwitchingKey::encrypt_sk_scratch_space(
-        module,
-        n,
-        basek,
-        k_ksk,
-        rank_in | rank_out,
-        rank_out,
-    ));
-    let mut scratch_apply: ScratchOwned<B> = ScratchOwned::alloc(GLWESwitchingKey::keyswitch_inplace_scratch_space(
-        module, n, basek, k_ct, k_ksk, digits, rank_out,
-    ));
-
-    let var_xs: f64 = 0.5;
-
-    let mut sk0: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in);
-    sk0.fill_ternary_prob(var_xs, &mut source_xs);
-
-    let mut sk1: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out);
-    sk1.fill_ternary_prob(var_xs, &mut source_xs);
-
-    let mut sk2: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out);
-    sk2.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk2_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk2);
-
-    // gglwe_{s1}(s0) = s0 -> s1
-    ct_gglwe_s0s1.encrypt_sk(
-        module,
-        &sk0,
-        &sk1,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch_enc.borrow(),
-    );
-
-    // gglwe_{s2}(s1) -> s1 -> s2
-    ct_gglwe_s1s2.encrypt_sk(
-        module,
-        &sk1,
-        &sk2,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch_enc.borrow(),
-    );
-
-    let ct_gglwe_s1s2_exec: GLWESwitchingKeyExec<Vec<u8>, B> =
-        GLWESwitchingKeyExec::from(module, &ct_gglwe_s1s2, scratch_apply.borrow());
-
-    // gglwe_{s1}(s0) (x) gglwe_{s2}(s1) = gglwe_{s2}(s0)
-    ct_gglwe_s0s1.keyswitch_inplace(module, &ct_gglwe_s1s2_exec, scratch_apply.borrow());
-
-    let ct_gglwe_s0s2: GLWESwitchingKey<Vec<u8>> = ct_gglwe_s0s1;
-
-    let max_noise: f64 = log2_std_noise_gglwe_product(
-        n as f64,
-        basek * digits,
-        var_xs,
-        var_xs,
-        0f64,
-        sigma * sigma,
-        0f64,
-        rank_out as f64,
-        k_ct,
-        k_ksk,
-    );
-
-    ct_gglwe_s0s2
-        .key
-        .assert_noise(module, &sk2_exec, &sk0.data, max_noise + 0.5);
-}
-
-pub(crate) fn test_gglwe_external_product<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_out: usize,
-    k_in: usize,
-    k_ggsw: usize,
-    digits: usize,
-    rank_in: usize,
-    rank_out: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWEExternalProductFamily<B>
-        + GGSWLayoutFamily<B>
-        + GLWEDecryptFamily<B>
-        + VecZnxRotateInplace,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_in.div_ceil(basek * digits);
-    let digits_in: usize = 1;
-
-    let mut ct_gglwe_in: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_in, rows, digits_in, rank_in, rank_out);
-    let mut ct_gglwe_out: GLWESwitchingKey<Vec<u8>> =
-        GLWESwitchingKey::alloc(n, basek, k_out, rows, digits_in, rank_in, rank_out);
-    let mut ct_rgsw: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_ggsw, rows, digits, rank_out);
-
-    let mut pt_rgsw: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
-        GLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k_in, rank_in, rank_out)
-            | GLWESwitchingKey::external_product_scratch_space(module, n, basek, k_out, k_in, k_ggsw, digits, rank_out)
-            | GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k_ggsw, rank_out),
-    );
-
-    let r: usize = 1;
-
-    pt_rgsw.to_mut().raw_mut()[r] = 1; // X^{r}
-
-    let var_xs: f64 = 0.5;
-
-    let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in);
-    sk_in.fill_ternary_prob(var_xs, &mut source_xs);
-
-    let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out);
-    sk_out.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk_out_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_out);
-
-    // gglwe_{s1}(s0) = s0 -> s1
-    ct_gglwe_in.encrypt_sk(
-        module,
-        &sk_in,
-        &sk_out,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    ct_rgsw.encrypt_sk(
-        module,
-        &pt_rgsw,
-        &sk_out_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut ct_rgsw_exec: GGSWCiphertextExec<Vec<u8>, B> =
-        GGSWCiphertextExec::alloc(module, n, basek, k_ggsw, rows, digits, rank_out);
-
-    ct_rgsw_exec.prepare(module, &ct_rgsw, scratch.borrow());
-
-    // gglwe_(m) (x) RGSW_(X^k) = gglwe_(m * X^k)
-    ct_gglwe_out.external_product(module, &ct_gglwe_in, &ct_rgsw_exec, scratch.borrow());
-
-    (0..rank_in).for_each(|i| {
-        module.vec_znx_rotate_inplace(r as i64, &mut sk_in.data.as_vec_znx_mut(), i); // * X^{r}
-    });
-
-    let var_gct_err_lhs: f64 = sigma * sigma;
-    let var_gct_err_rhs: f64 = 0f64;
-
-    let var_msg: f64 = 1f64 / n as f64; // X^{k}
-    let var_a0_err: f64 = sigma * sigma;
-    let var_a1_err: f64 = 1f64 / 12f64;
-
-    let max_noise: f64 = noise_ggsw_product(
-        n as f64,
-        basek * digits,
-        var_xs,
-        var_msg,
-        var_a0_err,
-        var_a1_err,
-        var_gct_err_lhs,
-        var_gct_err_rhs,
-        rank_out as f64,
-        k_in,
-        k_ggsw,
-    );
-
-    ct_gglwe_out
-        .key
-        .assert_noise(module, &sk_out_exec, &sk_in.data, max_noise + 0.5);
-}
-
-pub(crate) fn test_gglwe_external_product_inplace<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_ct: usize,
-    k_ggsw: usize,
-    digits: usize,
-    rank_in: usize,
-    rank_out: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWEExternalProductFamily<B>
-        + GGSWLayoutFamily<B>
-        + GLWEDecryptFamily<B>
-        + VecZnxRotateInplace,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_ct.div_ceil(basek * digits);
-
-    let digits_in: usize = 1;
-
-    let mut ct_gglwe: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_ct, rows, digits_in, rank_in, rank_out);
-    let mut ct_rgsw: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_ggsw, rows, digits, rank_out);
-
-    let mut pt_rgsw: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
-        GLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k_ct, rank_in, rank_out)
-            | GLWESwitchingKey::external_product_inplace_scratch_space(module, n, basek, k_ct, k_ggsw, digits, rank_out)
-            | GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k_ggsw, rank_out),
-    );
-
-    let r: usize = 1;
-
-    pt_rgsw.to_mut().raw_mut()[r] = 1; // X^{r}
-
-    let var_xs: f64 = 0.5;
-
-    let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in);
-    sk_in.fill_ternary_prob(var_xs, &mut source_xs);
-
-    let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out);
-    sk_out.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk_out_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_out);
-
-    // gglwe_{s1}(s0) = s0 -> s1
-    ct_gglwe.encrypt_sk(
-        module,
-        &sk_in,
-        &sk_out,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    ct_rgsw.encrypt_sk(
-        module,
-        &pt_rgsw,
-        &sk_out_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut ct_rgsw_exec: GGSWCiphertextExec<Vec<u8>, B> =
-        GGSWCiphertextExec::alloc(module, n, basek, k_ggsw, rows, digits, rank_out);
-
-    ct_rgsw_exec.prepare(module, &ct_rgsw, scratch.borrow());
-
-    // gglwe_(m) (x) RGSW_(X^k) = gglwe_(m * X^k)
-    ct_gglwe.external_product_inplace(module, &ct_rgsw_exec, scratch.borrow());
-
-    (0..rank_in).for_each(|i| {
-        module.vec_znx_rotate_inplace(r as i64, &mut sk_in.data.as_vec_znx_mut(), i); // * X^{r}
-    });
-
-    let var_gct_err_lhs: f64 = sigma * sigma;
-    let var_gct_err_rhs: f64 = 0f64;
-
-    let var_msg: f64 = 1f64 / n as f64; // X^{k}
-    let var_a0_err: f64 = sigma * sigma;
-    let var_a1_err: f64 = 1f64 / 12f64;
-
-    let max_noise: f64 = noise_ggsw_product(
-        n as f64,
-        basek * digits,
-        var_xs,
-        var_msg,
-        var_a0_err,
-        var_a1_err,
-        var_gct_err_lhs,
-        var_gct_err_rhs,
-        rank_out as f64,
-        k_ct,
-        k_ggsw,
-    );
-
-    ct_gglwe
-        .key
-        .assert_noise(module, &sk_out_exec, &sk_in.data, max_noise + 0.5);
-}

core/src/gglwe/tests/mod.rs

@@ -1,5 +0,0 @@
-mod cpu_spqlios;
-mod generic_serialization;
-mod generics_automorphism_key;
-mod generics_gglwe;
-mod generics_tensor_key;

core/src/ggsw/mod.rs

@@ -1,18 +0,0 @@
-mod automorphism;
-mod encryption;
-mod external_product;
-mod keyswitch;
-mod layout;
-mod layout_compressed;
-mod layout_exec;
-mod noise;
-
-pub use encryption::*;
-pub use keyswitch::*;
-pub use layout::*;
-pub use layout_compressed::*;
-pub use layout_exec::*;
-pub use noise::*;
-
-#[cfg(test)]
-mod test;

core/src/ggsw/test/cpu_spqlios/mod.rs

@@ -1 +0,0 @@
-mod fft64;

core/src/ggsw/test/generic_serialization.rs

@@ -1,15 +0,0 @@
-use backend::hal::tests::serialization::test_reader_writer_interface;
-
-use crate::{GGSWCiphertext, GGSWCiphertextCompressed};
-
-#[test]
-fn ggsw_test_serialization() {
-    let original: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(1024, 12, 54, 3, 1, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn ggsw_test_compressed_serialization() {
-    let original: GGSWCiphertextCompressed<Vec<u8>> = GGSWCiphertextCompressed::alloc(1024, 12, 54, 3, 1, 2);
-    test_reader_writer_interface(original);
-}

core/src/ggsw/test/generic_tests.rs

@@ -1,781 +0,0 @@
-use backend::hal::{
-    api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxAutomorphismInplace, VecZnxCopy,
-        VecZnxRotateInplace, VecZnxStd, VecZnxSubABInplace, VecZnxSwithcDegree, ZnxViewMut,
-    },
-    layouts::{Backend, Module, ScalarZnx, ScalarZnxToMut, ScratchOwned},
-    oep::{
-        ScratchAvailableImpl, ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeScalarZnxImpl, TakeSvpPPolImpl,
-        TakeVecZnxBigImpl, TakeVecZnxDftImpl, TakeVecZnxImpl, VecZnxBigAllocBytesImpl, VecZnxDftAllocBytesImpl,
-    },
-};
-use sampling::source::Source;
-
-use crate::{
-    AutomorphismKey, AutomorphismKeyExec, Decompress, GGLWEExecLayoutFamily, GGSWAssertNoiseFamily, GGSWCiphertext,
-    GGSWCiphertextCompressed, GGSWCiphertextExec, GGSWEncryptSkFamily, GGSWKeySwitchFamily, GLWESecret, GLWESecretExec,
-    GLWESecretFamily, GLWESwitchingKey, GLWESwitchingKeyEncryptSkFamily, GLWESwitchingKeyExec, GLWETensorKey,
-    GLWETensorKeyEncryptSkFamily, GLWETensorKeyExec,
-    noise::{noise_ggsw_keyswitch, noise_ggsw_product},
-};
-
-pub(crate) trait TestModuleFamily<B: Backend> = GLWESecretFamily<B>
-    + GGSWEncryptSkFamily<B>
-    + GGSWAssertNoiseFamily<B>
-    + VecZnxAddScalarInplace
-    + VecZnxSubABInplace
-    + VecZnxStd
-    + VecZnxCopy;
-pub(crate) trait TestScratchFamily<B: Backend> = TakeVecZnxDftImpl<B>
-    + TakeVecZnxBigImpl<B>
-    + TakeSvpPPolImpl<B>
-    + ScratchOwnedAllocImpl<B>
-    + ScratchOwnedBorrowImpl<B>
-    + ScratchAvailableImpl<B>
-    + TakeScalarZnxImpl<B>
-    + TakeVecZnxImpl<B>
-    + VecZnxDftAllocBytesImpl<B>
-    + VecZnxBigAllocBytesImpl<B>
-    + TakeSvpPPolImpl<B>;
-
-pub(crate) fn test_encrypt_sk<B: Backend>(module: &Module<B>, basek: usize, k: usize, digits: usize, rank: usize, sigma: f64)
-where
-    Module<B>: TestModuleFamily<B>,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = (k - digits * basek) / (digits * basek);
-
-    let mut ct: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k, rows, digits, rank);
-
-    let mut pt_scalar: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    pt_scalar.fill_ternary_hw(0, n, &mut source_xs);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(GGSWCiphertext::encrypt_sk_scratch_space(
-        module, n, basek, k, rank,
-    ));
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk.fill_ternary_prob(0.5, &mut source_xs);
-    let mut sk_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
-    sk_exec.prepare(module, &sk);
-
-    ct.encrypt_sk(
-        module,
-        &pt_scalar,
-        &sk_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let noise_f = |_col_i: usize| -(k as f64) + sigma.log2() + 0.5;
-
-    ct.assert_noise(module, &sk_exec, &pt_scalar, &noise_f);
-}
-
-pub(crate) fn test_encrypt_sk_compressed<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = (k - digits * basek) / (digits * basek);
-
-    let mut ct_compressed: GGSWCiphertextCompressed<Vec<u8>> = GGSWCiphertextCompressed::alloc(n, basek, k, rows, digits, rank);
-
-    let mut pt_scalar: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-
-    pt_scalar.fill_ternary_hw(0, n, &mut source_xs);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(GGSWCiphertextCompressed::encrypt_sk_scratch_space(
-        module, n, basek, k, rank,
-    ));
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk.fill_ternary_prob(0.5, &mut source_xs);
-    let mut sk_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
-    sk_exec.prepare(module, &sk);
-
-    let seed_xa: [u8; 32] = [1u8; 32];
-
-    ct_compressed.encrypt_sk(
-        module,
-        &pt_scalar,
-        &sk_exec,
-        seed_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let noise_f = |_col_i: usize| -(k as f64) + sigma.log2() + 0.5;
-
-    let mut ct: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k, rows, digits, rank);
-    ct.decompress(module, &ct_compressed);
-
-    ct.assert_noise(module, &sk_exec, &pt_scalar, &noise_f);
-}
-
-pub(crate) fn test_keyswitch<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_out: usize,
-    k_in: usize,
-    k_ksk: usize,
-    k_tsk: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GGSWAssertNoiseFamily<B>
-        + GGSWKeySwitchFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWETensorKeyEncryptSkFamily<B>
-        + GGLWEExecLayoutFamily<B>
-        + VecZnxSwithcDegree,
-    B: TestScratchFamily<B> + VecZnxDftAllocBytesImpl<B> + VecZnxBigAllocBytesImpl<B> + TakeSvpPPolImpl<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_in.div_ceil(digits * basek);
-
-    let digits_in: usize = 1;
-
-    let mut ct_in: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_in, rows, digits_in, rank);
-    let mut ct_out: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_out, rows, digits_in, rank);
-    let mut tsk: GLWETensorKey<Vec<u8>> = GLWETensorKey::alloc(n, basek, k_ksk, rows, digits, rank);
-    let mut ksk: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank, rank);
-    let mut pt_scalar: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
-        GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k_in, rank)
-            | GLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k_ksk, rank, rank)
-            | GLWETensorKey::encrypt_sk_scratch_space(module, n, basek, k_tsk, rank)
-            | GGSWCiphertext::keyswitch_scratch_space(
-                module, n, basek, k_out, k_in, k_ksk, digits, k_tsk, digits, rank,
-            ),
-    );
-
-    let var_xs: f64 = 0.5;
-
-    let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk_in.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk_in_dft: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_in);
-
-    let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk_out.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk_out_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_out);
-
-    ksk.encrypt_sk(
-        module,
-        &sk_in,
-        &sk_out,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-    tsk.encrypt_sk(
-        module,
-        &sk_out,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    pt_scalar.fill_ternary_hw(0, n, &mut source_xs);
-
-    ct_in.encrypt_sk(
-        module,
-        &pt_scalar,
-        &sk_in_dft,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut ksk_exec: GLWESwitchingKeyExec<Vec<u8>, B> =
-        GLWESwitchingKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank, rank);
-    let mut tsk_exec: GLWETensorKeyExec<Vec<u8>, B> = GLWETensorKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
-
-    ksk_exec.prepare(module, &ksk, scratch.borrow());
-    tsk_exec.prepare(module, &tsk, scratch.borrow());
-
-    ct_out.keyswitch(module, &ct_in, &ksk_exec, &tsk_exec, scratch.borrow());
-
-    let max_noise = |col_j: usize| -> f64 {
-        noise_ggsw_keyswitch(
-            n as f64,
-            basek * digits,
-            col_j,
-            var_xs,
-            0f64,
-            sigma * sigma,
-            0f64,
-            rank as f64,
-            k_in,
-            k_ksk,
-            k_tsk,
-        ) + 0.5
-    };
-
-    ct_out.assert_noise(module, &sk_out_exec, &pt_scalar, &max_noise);
-}
-
-pub(crate) fn test_keyswitch_inplace<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_ct: usize,
-    k_ksk: usize,
-    k_tsk: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GGSWAssertNoiseFamily<B>
-        + GGSWKeySwitchFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWETensorKeyEncryptSkFamily<B>
-        + GGLWEExecLayoutFamily<B>
-        + VecZnxSwithcDegree,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_ct.div_ceil(digits * basek);
-
-    let digits_in: usize = 1;
-
-    let mut ct: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_ct, rows, digits_in, rank);
-    let mut tsk: GLWETensorKey<Vec<u8>> = GLWETensorKey::alloc(n, basek, k_tsk, rows, digits, rank);
-    let mut ksk: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank, rank);
-    let mut pt_scalar: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
-        GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k_ct, rank)
-            | GLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k_ksk, rank, rank)
-            | GLWETensorKey::encrypt_sk_scratch_space(module, n, basek, k_tsk, rank)
-            | GGSWCiphertext::keyswitch_inplace_scratch_space(module, n, basek, k_ct, k_ksk, digits, k_tsk, digits, rank),
-    );
-
-    let var_xs: f64 = 0.5;
-
-    let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk_in.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk_in_dft: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_in);
-
-    let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk_out.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk_out_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_out);
-
-    ksk.encrypt_sk(
-        module,
-        &sk_in,
-        &sk_out,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-    tsk.encrypt_sk(
-        module,
-        &sk_out,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    pt_scalar.fill_ternary_hw(0, n, &mut source_xs);
-
-    ct.encrypt_sk(
-        module,
-        &pt_scalar,
-        &sk_in_dft,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut ksk_exec: GLWESwitchingKeyExec<Vec<u8>, B> =
-        GLWESwitchingKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank, rank);
-    let mut tsk_exec: GLWETensorKeyExec<Vec<u8>, B> = GLWETensorKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
-
-    ksk_exec.prepare(module, &ksk, scratch.borrow());
-    tsk_exec.prepare(module, &tsk, scratch.borrow());
-
-    ct.keyswitch_inplace(module, &ksk_exec, &tsk_exec, scratch.borrow());
-
-    let max_noise = |col_j: usize| -> f64 {
-        noise_ggsw_keyswitch(
-            n as f64,
-            basek * digits,
-            col_j,
-            var_xs,
-            0f64,
-            sigma * sigma,
-            0f64,
-            rank as f64,
-            k_ct,
-            k_ksk,
-            k_tsk,
-        ) + 0.5
-    };
-
-    ct.assert_noise(module, &sk_out_exec, &pt_scalar, &max_noise);
-}
-
-pub(crate) fn test_automorphism<B: Backend>(
-    p: i64,
-    module: &Module<B>,
-    basek: usize,
-    k_out: usize,
-    k_in: usize,
-    k_ksk: usize,
-    k_tsk: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GGSWAssertNoiseFamily<B>
-        + GGSWKeySwitchFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWETensorKeyEncryptSkFamily<B>
-        + GGLWEExecLayoutFamily<B>
-        + VecZnxSwithcDegree
-        + VecZnxAutomorphismInplace
-        + VecZnxAutomorphismInplace
-        + VecZnxAutomorphism,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_in.div_ceil(basek * digits);
-    let rows_in: usize = k_in.div_euclid(basek * digits);
-
-    let digits_in: usize = 1;
-
-    let mut ct_in: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_in, rows_in, digits_in, rank);
-    let mut ct_out: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_out, rows_in, digits_in, rank);
-    let mut tensor_key: GLWETensorKey<Vec<u8>> = GLWETensorKey::alloc(n, basek, k_tsk, rows, digits, rank);
-    let mut auto_key: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_ksk, rows, digits, rank);
-    let mut pt_scalar: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
-        GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k_in, rank)
-            | AutomorphismKey::encrypt_sk_scratch_space(module, n, basek, k_ksk, rank)
-            | GLWETensorKey::encrypt_sk_scratch_space(module, n, basek, k_tsk, rank)
-            | GGSWCiphertext::automorphism_scratch_space(
-                module, n, basek, k_out, k_in, k_ksk, digits, k_tsk, digits, rank,
-            ),
-    );
-
-    let var_xs: f64 = 0.5;
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
-
-    auto_key.encrypt_sk(
-        module,
-        p,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-    tensor_key.encrypt_sk(
-        module,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    pt_scalar.fill_ternary_hw(0, n, &mut source_xs);
-
-    ct_in.encrypt_sk(
-        module,
-        &pt_scalar,
-        &sk_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut auto_key_exec: AutomorphismKeyExec<Vec<u8>, B> =
-        AutomorphismKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
-    auto_key_exec.prepare(module, &auto_key, scratch.borrow());
-
-    let mut tsk_exec: GLWETensorKeyExec<Vec<u8>, B> = GLWETensorKeyExec::alloc(module, n, basek, k_tsk, rows, digits, rank);
-    tsk_exec.prepare(module, &tensor_key, scratch.borrow());
-
-    ct_out.automorphism(module, &ct_in, &auto_key_exec, &tsk_exec, scratch.borrow());
-
-    module.vec_znx_automorphism_inplace(p, &mut pt_scalar.as_vec_znx_mut(), 0);
-
-    let max_noise = |col_j: usize| -> f64 {
-        noise_ggsw_keyswitch(
-            n as f64,
-            basek * digits,
-            col_j,
-            var_xs,
-            0f64,
-            sigma * sigma,
-            0f64,
-            rank as f64,
-            k_in,
-            k_ksk,
-            k_tsk,
-        ) + 0.5
-    };
-
-    ct_out.assert_noise(module, &sk_exec, &pt_scalar, &max_noise);
-}
-
-pub(crate) fn test_automorphism_inplace<B: Backend>(
-    p: i64,
-    module: &Module<B>,
-    basek: usize,
-    k_ct: usize,
-    k_ksk: usize,
-    k_tsk: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GGSWAssertNoiseFamily<B>
-        + GGSWKeySwitchFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWETensorKeyEncryptSkFamily<B>
-        + GGLWEExecLayoutFamily<B>
-        + VecZnxSwithcDegree
-        + VecZnxAutomorphismInplace
-        + VecZnxAutomorphism
-        + VecZnxAutomorphismInplace,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_ct.div_ceil(digits * basek);
-    let rows_in: usize = k_ct.div_euclid(basek * digits);
-    let digits_in: usize = 1;
-
-    let mut ct: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_ct, rows_in, digits_in, rank);
-    let mut tensor_key: GLWETensorKey<Vec<u8>> = GLWETensorKey::alloc(n, basek, k_tsk, rows, digits, rank);
-    let mut auto_key: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_ksk, rows, digits, rank);
-    let mut pt_scalar: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
-        GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k_ct, rank)
-            | AutomorphismKey::encrypt_sk_scratch_space(module, n, basek, k_ksk, rank)
-            | GLWETensorKey::encrypt_sk_scratch_space(module, n, basek, k_tsk, rank)
-            | GGSWCiphertext::automorphism_inplace_scratch_space(module, n, basek, k_ct, k_ksk, digits, k_tsk, digits, rank),
-    );
-
-    let var_xs: f64 = 0.5;
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk.fill_ternary_prob(var_xs, &mut source_xs);
-    let sk_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
-
-    auto_key.encrypt_sk(
-        module,
-        p,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-    tensor_key.encrypt_sk(
-        module,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    pt_scalar.fill_ternary_hw(0, n, &mut source_xs);
-
-    ct.encrypt_sk(
-        module,
-        &pt_scalar,
-        &sk_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut auto_key_exec: AutomorphismKeyExec<Vec<u8>, B> =
-        AutomorphismKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
-    auto_key_exec.prepare(module, &auto_key, scratch.borrow());
-
-    let mut tsk_exec: GLWETensorKeyExec<Vec<u8>, B> = GLWETensorKeyExec::alloc(module, n, basek, k_tsk, rows, digits, rank);
-    tsk_exec.prepare(module, &tensor_key, scratch.borrow());
-
-    ct.automorphism_inplace(module, &auto_key_exec, &tsk_exec, scratch.borrow());
-
-    module.vec_znx_automorphism_inplace(p, &mut pt_scalar.as_vec_znx_mut(), 0);
-
-    let max_noise = |col_j: usize| -> f64 {
-        noise_ggsw_keyswitch(
-            n as f64,
-            basek * digits,
-            col_j,
-            var_xs,
-            0f64,
-            sigma * sigma,
-            0f64,
-            rank as f64,
-            k_ct,
-            k_ksk,
-            k_tsk,
-        ) + 0.5
-    };
-
-    ct.assert_noise(module, &sk_exec, &pt_scalar, &max_noise);
-}
-
-pub(crate) fn test_external_product<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_in: usize,
-    k_out: usize,
-    k_ggsw: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GGSWAssertNoiseFamily<B>
-        + GGSWKeySwitchFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWETensorKeyEncryptSkFamily<B>
-        + GGLWEExecLayoutFamily<B>
-        + VecZnxRotateInplace,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_in.div_ceil(basek * digits);
-    let rows_in: usize = k_in.div_euclid(basek * digits);
-    let digits_in: usize = 1;
-
-    let mut ct_ggsw_lhs_in: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_in, rows_in, digits_in, rank);
-    let mut ct_ggsw_lhs_out: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_out, rows_in, digits_in, rank);
-    let mut ct_ggsw_rhs: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_ggsw, rows, digits, rank);
-    let mut pt_ggsw_lhs: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-    let mut pt_ggsw_rhs: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    pt_ggsw_lhs.fill_ternary_prob(0, 0.5, &mut source_xs);
-
-    let k: usize = 1;
-
-    pt_ggsw_rhs.to_mut().raw_mut()[k] = 1; //X^{k}
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
-        GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k_ggsw, rank)
-            | GGSWCiphertext::external_product_scratch_space(module, n, basek, k_out, k_in, k_ggsw, digits, rank),
-    );
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk.fill_ternary_prob(0.5, &mut source_xs);
-    let sk_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
-
-    ct_ggsw_rhs.encrypt_sk(
-        module,
-        &pt_ggsw_rhs,
-        &sk_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    ct_ggsw_lhs_in.encrypt_sk(
-        module,
-        &pt_ggsw_lhs,
-        &sk_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut ct_rhs_exec: GGSWCiphertextExec<Vec<u8>, B> = GGSWCiphertextExec::alloc(module, n, basek, k_ggsw, rows, digits, rank);
-    ct_rhs_exec.prepare(module, &ct_ggsw_rhs, scratch.borrow());
-
-    ct_ggsw_lhs_out.external_product(module, &ct_ggsw_lhs_in, &ct_rhs_exec, scratch.borrow());
-
-    module.vec_znx_rotate_inplace(k as i64, &mut pt_ggsw_lhs.as_vec_znx_mut(), 0);
-
-    let var_gct_err_lhs: f64 = sigma * sigma;
-    let var_gct_err_rhs: f64 = 0f64;
-
-    let var_msg: f64 = 1f64 / n as f64; // X^{k}
-    let var_a0_err: f64 = sigma * sigma;
-    let var_a1_err: f64 = 1f64 / 12f64;
-
-    let max_noise = |_col_j: usize| -> f64 {
-        noise_ggsw_product(
-            n as f64,
-            basek * digits,
-            0.5,
-            var_msg,
-            var_a0_err,
-            var_a1_err,
-            var_gct_err_lhs,
-            var_gct_err_rhs,
-            rank as f64,
-            k_in,
-            k_ggsw,
-        ) + 0.5
-    };
-
-    ct_ggsw_lhs_out.assert_noise(module, &sk_exec, &pt_ggsw_lhs, &max_noise);
-}
-
-pub(crate) fn test_external_product_inplace<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_ct: usize,
-    k_ggsw: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: TestModuleFamily<B>
-        + GGSWAssertNoiseFamily<B>
-        + GGSWKeySwitchFamily<B>
-        + GLWESwitchingKeyEncryptSkFamily<B>
-        + GLWETensorKeyEncryptSkFamily<B>
-        + GGLWEExecLayoutFamily<B>
-        + VecZnxRotateInplace,
-    B: TestScratchFamily<B>,
-{
-    let n: usize = module.n();
-    let rows: usize = k_ct.div_ceil(digits * basek);
-    let rows_in: usize = k_ct.div_euclid(basek * digits);
-    let digits_in: usize = 1;
-
-    let mut ct_ggsw_lhs: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_ct, rows_in, digits_in, rank);
-    let mut ct_ggsw_rhs: GGSWCiphertext<Vec<u8>> = GGSWCiphertext::alloc(n, basek, k_ggsw, rows, digits, rank);
-
-    let mut pt_ggsw_lhs: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-    let mut pt_ggsw_rhs: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-
-    let mut source_xs: Source = Source::new([0u8; 32]);
-    let mut source_xe: Source = Source::new([0u8; 32]);
-    let mut source_xa: Source = Source::new([0u8; 32]);
-
-    pt_ggsw_lhs.fill_ternary_prob(0, 0.5, &mut source_xs);
-
-    let k: usize = 1;
-
-    pt_ggsw_rhs.to_mut().raw_mut()[k] = 1; //X^{k}
-
-    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
-        GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k_ggsw, rank)
-            | GGSWCiphertext::external_product_inplace_scratch_space(module, n, basek, k_ct, k_ggsw, digits, rank),
-    );
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk.fill_ternary_prob(0.5, &mut source_xs);
-    let sk_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
-
-    ct_ggsw_rhs.encrypt_sk(
-        module,
-        &pt_ggsw_rhs,
-        &sk_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    ct_ggsw_lhs.encrypt_sk(
-        module,
-        &pt_ggsw_lhs,
-        &sk_exec,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut ct_rhs_exec: GGSWCiphertextExec<Vec<u8>, B> = GGSWCiphertextExec::alloc(module, n, basek, k_ggsw, rows, digits, rank);
-    ct_rhs_exec.prepare(module, &ct_ggsw_rhs, scratch.borrow());
-
-    ct_ggsw_lhs.external_product_inplace(module, &ct_rhs_exec, scratch.borrow());
-
-    module.vec_znx_rotate_inplace(k as i64, &mut pt_ggsw_lhs.as_vec_znx_mut(), 0);
-
-    let var_gct_err_lhs: f64 = sigma * sigma;
-    let var_gct_err_rhs: f64 = 0f64;
-
-    let var_msg: f64 = 1f64 / n as f64; // X^{k}
-    let var_a0_err: f64 = sigma * sigma;
-    let var_a1_err: f64 = 1f64 / 12f64;
-
-    let max_noise = |_col_j: usize| -> f64 {
-        noise_ggsw_product(
-            n as f64,
-            basek * digits,
-            0.5,
-            var_msg,
-            var_a0_err,
-            var_a1_err,
-            var_gct_err_lhs,
-            var_gct_err_rhs,
-            rank as f64,
-            k_ct,
-            k_ggsw,
-        ) + 0.5
-    };
-
-    ct_ggsw_lhs.assert_noise(module, &sk_exec, &pt_ggsw_lhs, &max_noise);
-}

core/src/ggsw/test/mod.rs

@@ -1,3 +0,0 @@
-mod cpu_spqlios;
-mod generic_serialization;
-mod generic_tests;

core/src/glwe/mod.rs

@@ -1,28 +0,0 @@
-mod automorphism;
-mod decryption;
-mod encryption;
-mod external_product;
-mod keyswitch;
-mod layout;
-mod noise;
-mod ops;
-mod packing;
-mod plaintext;
-mod public_key;
-mod secret;
-mod trace;
-
-#[cfg(test)]
-mod tests;
-
-pub use decryption::*;
-pub use encryption::*;
-pub use external_product::*;
-pub use keyswitch::*;
-pub use layout::*;
-pub use ops::GLWEOps;
-pub use packing::*;
-pub use plaintext::*;
-pub use public_key::*;
-pub use secret::*;
-pub use trace::*;

core/src/glwe/public_key.rs

@@ -1,204 +0,0 @@
-use backend::hal::{
-    api::{ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxDftAlloc, VecZnxDftAllocBytes, VecZnxDftFromVecZnx},
-    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, Scratch, ScratchOwned, VecZnx, VecZnxDft, WriterTo},
-    oep::{ScratchAvailableImpl, ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeVecZnxDftImpl, TakeVecZnxImpl},
-};
-use sampling::source::Source;
-
-use crate::{GLWECiphertext, GLWEEncryptSkFamily, GLWESecretExec, Infos, dist::Distribution};
-
-pub trait GLWEPublicKeyFamily<B: Backend> = GLWEEncryptSkFamily<B>;
-
-#[derive(PartialEq, Eq)]
-pub struct GLWEPublicKey<D: Data> {
-    pub(crate) data: VecZnx<D>,
-    pub(crate) basek: usize,
-    pub(crate) k: usize,
-    pub(crate) dist: Distribution,
-}
-
-impl GLWEPublicKey<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rank: usize) -> Self {
-        Self {
-            data: VecZnx::alloc(n, rank + 1, k.div_ceil(basek)),
-            basek: basek,
-            k: k,
-            dist: Distribution::NONE,
-        }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rank: usize) -> usize {
-        VecZnx::alloc_bytes(n, rank + 1, k.div_ceil(basek))
-    }
-}
-
-impl<D: Data> Infos for GLWEPublicKey<D> {
-    type Inner = VecZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.data
-    }
-
-    fn basek(&self) -> usize {
-        self.basek
-    }
-
-    fn k(&self) -> usize {
-        self.k
-    }
-}
-
-impl<D: Data> GLWEPublicKey<D> {
-    pub fn rank(&self) -> usize {
-        self.cols() - 1
-    }
-}
-
-impl<D: DataMut> GLWEPublicKey<D> {
-    pub fn generate_from_sk<S: DataRef, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        sk: &GLWESecretExec<S, B>,
-        source_xa: &mut Source,
-        source_xe: &mut Source,
-        sigma: f64,
-    ) where
-        Module<B>: GLWEPublicKeyFamily<B>,
-        B: ScratchOwnedAllocImpl<B>
-            + ScratchOwnedBorrowImpl<B>
-            + TakeVecZnxDftImpl<B>
-            + ScratchAvailableImpl<B>
-            + TakeVecZnxImpl<B>,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.n(), sk.n());
-
-            match sk.dist {
-                Distribution::NONE => panic!("invalid sk: SecretDistribution::NONE"),
-                _ => {}
-            }
-        }
-
-        // Its ok to allocate scratch space here since pk is usually generated only once.
-        let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(GLWECiphertext::encrypt_sk_scratch_space(
-            module,
-            self.n(),
-            self.basek(),
-            self.k(),
-        ));
-
-        let mut tmp: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(self.n(), self.basek(), self.k(), self.rank());
-        tmp.encrypt_zero_sk(module, sk, source_xa, source_xe, sigma, scratch.borrow());
-        self.dist = sk.dist;
-    }
-}
-
-use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
-
-impl<D: DataMut> ReaderFrom for GLWEPublicKey<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        self.k = reader.read_u64::<LittleEndian>()? as usize;
-        self.basek = reader.read_u64::<LittleEndian>()? as usize;
-        match Distribution::read_from(reader) {
-            Ok(dist) => self.dist = dist,
-            Err(e) => return Err(e),
-        }
-        self.data.read_from(reader)
-    }
-}
-
-impl<D: DataRef> WriterTo for GLWEPublicKey<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.k as u64)?;
-        writer.write_u64::<LittleEndian>(self.basek as u64)?;
-        match self.dist.write_to(writer) {
-            Ok(()) => {}
-            Err(e) => return Err(e),
-        }
-        self.data.write_to(writer)
-    }
-}
-
-#[derive(PartialEq, Eq)]
-pub struct GLWEPublicKeyExec<D: Data, B: Backend> {
-    pub(crate) data: VecZnxDft<D, B>,
-    pub(crate) basek: usize,
-    pub(crate) k: usize,
-    pub(crate) dist: Distribution,
-}
-
-impl<D: Data, B: Backend> Infos for GLWEPublicKeyExec<D, B> {
-    type Inner = VecZnxDft<D, B>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.data
-    }
-
-    fn basek(&self) -> usize {
-        self.basek
-    }
-
-    fn k(&self) -> usize {
-        self.k
-    }
-}
-
-impl<D: Data, B: Backend> GLWEPublicKeyExec<D, B> {
-    pub fn rank(&self) -> usize {
-        self.cols() - 1
-    }
-}
-
-impl<B: Backend> GLWEPublicKeyExec<Vec<u8>, B> {
-    pub fn alloc(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> Self
-    where
-        Module<B>: VecZnxDftAlloc<B>,
-    {
-        Self {
-            data: module.vec_znx_dft_alloc(n, rank + 1, k.div_ceil(basek)),
-            basek: basek,
-            k: k,
-            dist: Distribution::NONE,
-        }
-    }
-
-    pub fn bytes_of(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: VecZnxDftAllocBytes,
-    {
-        module.vec_znx_dft_alloc_bytes(n, rank + 1, k.div_ceil(basek))
-    }
-
-    pub fn from<DataOther>(module: &Module<B>, other: &GLWEPublicKey<DataOther>, scratch: &mut Scratch<B>) -> Self
-    where
-        DataOther: DataRef,
-        Module<B>: VecZnxDftAlloc<B> + VecZnxDftFromVecZnx<B>,
-    {
-        let mut pk_exec: GLWEPublicKeyExec<Vec<u8>, B> =
-            GLWEPublicKeyExec::alloc(module, other.n(), other.basek(), other.k(), other.rank());
-        pk_exec.prepare(module, other, scratch);
-        pk_exec
-    }
-}
-
-impl<D: DataMut, B: Backend> GLWEPublicKeyExec<D, B> {
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GLWEPublicKey<DataOther>, _scratch: &mut Scratch<B>)
-    where
-        DataOther: DataRef,
-        Module<B>: VecZnxDftFromVecZnx<B>,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.n(), other.n());
-            assert_eq!(self.size(), other.size());
-        }
-
-        (0..self.cols()).for_each(|i| {
-            module.vec_znx_dft_from_vec_znx(1, 0, &mut self.data, i, &other.data, i);
-        });
-        self.k = other.k;
-        self.basek = other.basek;
-        self.dist = other.dist;
-    }
-}

core/src/glwe/tests/cpu_spqlios/mod.rs

@@ -1 +0,0 @@
-mod fft64;

core/src/glwe/tests/generic_serialization.rs

@@ -1,15 +0,0 @@
-use backend::hal::tests::serialization::test_reader_writer_interface;
-
-use crate::{GLWECiphertext, GLWECiphertextCompressed};
-
-#[test]
-fn test_serialization() {
-    let original: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(1024, 12, 54, 3);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_compressed_serialization() {
-    let original: GLWECiphertextCompressed<Vec<u8>> = GLWECiphertextCompressed::alloc(1024, 12, 54, 3);
-    test_reader_writer_interface(original);
-}

core/src/glwe/tests/mod.rs

@@ -1,8 +0,0 @@
-mod cpu_spqlios;
-mod generic_automorphism;
-mod generic_encryption;
-mod generic_external_product;
-mod generic_keyswitch;
-mod generic_serialization;
-mod packing;
-mod trace;

core/src/glwe_packing.rs

@@ -1,29 +1,16 @@
 use std::collections::HashMap;
 
 use backend::hal::{
-    api::{
-        ScratchAvailable, TakeVecZnx, TakeVecZnxDft, VecZnxAddInplace, VecZnxAutomorphismInplace, VecZnxBigAutomorphismInplace,
-        VecZnxBigSubSmallBInplace, VecZnxCopy, VecZnxNegateInplace, VecZnxNormalizeInplace, VecZnxRotate, VecZnxRotateInplace,
-        VecZnxRshInplace, VecZnxSub, VecZnxSubABInplace,
-    },
+    api::{ScratchAvailable, TakeVecZnx, TakeVecZnxDft, VecZnxCopy},
     layouts::{Backend, DataMut, DataRef, Module, Scratch},
 };
 
-use crate::{AutomorphismKeyExec, GLWECiphertext, GLWEKeyswitchFamily, GLWEOps, Infos, TakeGLWECt};
+use crate::{
+    GLWEOperations, TakeGLWECt,
+    layouts::{GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyExec},
+};
 
-pub trait GLWEPackingFamily<B: Backend> = GLWEKeyswitchFamily<B>
-    + VecZnxCopy
-    + VecZnxRotateInplace
-    + VecZnxSub
-    + VecZnxNegateInplace
-    + VecZnxRshInplace
-    + VecZnxAddInplace
-    + VecZnxNormalizeInplace<B>
-    + VecZnxSubABInplace
-    + VecZnxRotate
-    + VecZnxAutomorphismInplace
-    + VecZnxBigSubSmallBInplace<B>
-    + VecZnxBigAutomorphismInplace<B>;
+use crate::trait_families::{GLWEKeyswitchFamily, GLWEPackingFamily};
 
 /// [GLWEPacker] enables only the fly GLWE packing
 /// with constant memory of Log(N) ciphertexts.
@@ -128,7 +115,7 @@ impl GLWEPacker {
         &mut self,
         module: &Module<B>,
         a: Option<&GLWECiphertext<DataA>>,
-        auto_keys: &HashMap<i64, AutomorphismKeyExec<DataAK, B>>,
+        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEPackingFamily<B>,
@@ -187,7 +174,7 @@ fn pack_core<D: DataRef, DataAK: DataRef, B: Backend>(
     a: Option<&GLWECiphertext<D>>,
     accumulators: &mut [Accumulator],
     i: usize,
-    auto_keys: &HashMap<i64, AutomorphismKeyExec<DataAK, B>>,
+    auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
     scratch: &mut Scratch<B>,
 ) where
     Module<B>: GLWEPackingFamily<B>,
@@ -265,7 +252,7 @@ fn combine<D: DataRef, DataAK: DataRef, B: Backend>(
     acc: &mut Accumulator,
     b: Option<&GLWECiphertext<D>>,
     i: usize,
-    auto_keys: &HashMap<i64, AutomorphismKeyExec<DataAK, B>>,
+    auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
     scratch: &mut Scratch<B>,
 ) where
     Module<B>: GLWEPackingFamily<B>,

core/src/glwe_trace.rs

@@ -1,13 +1,13 @@
 use std::collections::HashMap;
 
-use backend::hal::{
-    api::{ScratchAvailable, TakeVecZnxDft, VecZnxBigAutomorphismInplace, VecZnxCopy, VecZnxRshInplace},
-    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+use backend::hal::layouts::{Backend, DataMut, DataRef, Module, Scratch};
+
+use crate::{
+    layouts::{GLWECiphertext, prepared::GGLWEAutomorphismKeyExec},
+    operations::GLWEOperations,
 };
 
-use crate::{AutomorphismKeyExec, GLWECiphertext, GLWECiphertextToMut, GLWEKeyswitchFamily, GLWEOps, Infos, SetMetaData};
-
-pub trait GLWETraceFamily<B: Backend> = GLWEKeyswitchFamily<B> + VecZnxCopy + VecZnxRshInplace + VecZnxBigAutomorphismInplace<B>;
+use crate::trait_families::{GLWETraceModuleFamily, GLWETraceScratchFamily};
 
 impl GLWECiphertext<Vec<u8>> {
     pub fn trace_galois_elements<B: Backend>(module: &Module<B>) -> Vec<i64> {
@@ -33,7 +33,7 @@ impl GLWECiphertext<Vec<u8>> {
         rank: usize,
     ) -> usize
     where
-        Module<B>: GLWEKeyswitchFamily<B>,
+        Module<B>: GLWETraceModuleFamily<B>,
     {
         Self::automorphism_inplace_scratch_space(module, n, basek, out_k.min(in_k), ksk_k, digits, rank)
     }
@@ -48,27 +48,24 @@ impl GLWECiphertext<Vec<u8>> {
         rank: usize,
     ) -> usize
     where
-        Module<B>: GLWEKeyswitchFamily<B>,
+        Module<B>: GLWETraceModuleFamily<B>,
     {
         Self::automorphism_inplace_scratch_space(module, n, basek, out_k, ksk_k, digits, rank)
     }
 }
 
-impl<DataSelf: DataMut> GLWECiphertext<DataSelf>
-where
-    GLWECiphertext<DataSelf>: GLWECiphertextToMut + Infos + SetMetaData,
-{
+impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn trace<DataLhs: DataRef, DataAK: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
         start: usize,
         end: usize,
         lhs: &GLWECiphertext<DataLhs>,
-        auto_keys: &HashMap<i64, AutomorphismKeyExec<DataAK, B>>,
+        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
         scratch: &mut Scratch<B>,
     ) where
-        Module<B>: GLWETraceFamily<B>,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable,
+        Module<B>: GLWETraceModuleFamily<B>,
+        Scratch<B>: GLWETraceScratchFamily<B>,
     {
         self.copy(module, lhs);
         self.trace_inplace(module, start, end, auto_keys, scratch);
@@ -79,11 +76,11 @@ where
         module: &Module<B>,
         start: usize,
         end: usize,
-        auto_keys: &HashMap<i64, AutomorphismKeyExec<DataAK, B>>,
+        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
         scratch: &mut Scratch<B>,
     ) where
-        Module<B>: GLWETraceFamily<B>,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable,
+        Module<B>: GLWETraceModuleFamily<B>,
+        Scratch<B>: GLWETraceScratchFamily<B>,
     {
         (start..end).for_each(|i| {
             self.rsh(module, 1);

core/src/keyswitching/gglwe_ct.rs

@@ -4,10 +4,14 @@ use backend::hal::{
 };
 
 use crate::{
-    AutomorphismKey, AutomorphismKeyExec, GLWECiphertext, GLWEKeyswitchFamily, GLWESwitchingKey, GLWESwitchingKeyExec, Infos,
+    layouts::{
+        GGLWEAutomorphismKey, GLWECiphertext, GGLWESwitchingKey, Infos,
+        prepared::{GGLWEAutomorphismKeyExec, GGLWESwitchingKeyExec},
+    },
+    trait_families::GLWEKeyswitchFamily,
 };
 
-impl AutomorphismKey<Vec<u8>> {
+impl GGLWEAutomorphismKey<Vec<u8>> {
     pub fn keyswitch_scratch_space<B: Backend>(
         module: &Module<B>,
         n: usize,
@@ -21,7 +25,7 @@ impl AutomorphismKey<Vec<u8>> {
     where
         Module<B>: GLWEKeyswitchFamily<B>,
     {
-        GLWESwitchingKey::keyswitch_scratch_space(module, n, basek, k_out, k_in, k_ksk, digits, rank, rank)
+        GGLWESwitchingKey::keyswitch_scratch_space(module, n, basek, k_out, k_in, k_ksk, digits, rank, rank)
     }
 
     pub fn keyswitch_inplace_scratch_space<B: Backend>(
@@ -36,16 +40,16 @@ impl AutomorphismKey<Vec<u8>> {
     where
         Module<B>: GLWEKeyswitchFamily<B>,
     {
-        GLWESwitchingKey::keyswitch_inplace_scratch_space(module, n, basek, k_out, k_ksk, digits, rank)
+        GGLWESwitchingKey::keyswitch_inplace_scratch_space(module, n, basek, k_out, k_ksk, digits, rank)
     }
 }
 
-impl<DataSelf: DataMut> AutomorphismKey<DataSelf> {
+impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
     pub fn keyswitch<DataLhs: DataRef, DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        lhs: &AutomorphismKey<DataLhs>,
-        rhs: &GLWESwitchingKeyExec<DataRhs, B>,
+        lhs: &GGLWEAutomorphismKey<DataLhs>,
+        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -57,7 +61,7 @@ impl<DataSelf: DataMut> AutomorphismKey<DataSelf> {
     pub fn keyswitch_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &AutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -67,7 +71,7 @@ impl<DataSelf: DataMut> AutomorphismKey<DataSelf> {
     }
 }
 
-impl GLWESwitchingKey<Vec<u8>> {
+impl GGLWESwitchingKey<Vec<u8>> {
     pub fn keyswitch_scratch_space<B: Backend>(
         module: &Module<B>,
         n: usize,
@@ -103,12 +107,12 @@ impl GLWESwitchingKey<Vec<u8>> {
     }
 }
 
-impl<DataSelf: DataMut> GLWESwitchingKey<DataSelf> {
+impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
     pub fn keyswitch<DataLhs: DataRef, DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        lhs: &GLWESwitchingKey<DataLhs>,
-        rhs: &GLWESwitchingKeyExec<DataRhs, B>,
+        lhs: &GGLWESwitchingKey<DataLhs>,
+        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -156,7 +160,7 @@ impl<DataSelf: DataMut> GLWESwitchingKey<DataSelf> {
     pub fn keyswitch_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,

core/src/keyswitching/ggsw_ct.rs

@@ -7,12 +7,14 @@ use backend::hal::{
 };
 
 use crate::{
-    GGLWECiphertext, GGSWCiphertext, GLWECiphertext, GLWEKeyswitchFamily, GLWEOps, GLWESwitchingKeyExec, GLWETensorKeyExec, Infos,
+    layouts::{
+        GGLWECiphertext, GGSWCiphertext, GLWECiphertext, Infos,
+        prepared::{GGLWESwitchingKeyExec, GGLWETensorKeyExec},
+    },
+    operations::GLWEOperations,
+    trait_families::{GGSWKeySwitchFamily, GLWEKeyswitchFamily},
 };
 
-pub trait GGSWKeySwitchFamily<B> =
-    GLWEKeyswitchFamily<B> + VecZnxBigAllocBytes + VecZnxDftCopy<B> + VecZnxDftAddInplace<B> + VecZnxDftToVecZnxBigTmpA<B>;
-
 impl GGSWCiphertext<Vec<u8>> {
     pub(crate) fn expand_row_scratch_space<B: Backend>(
         module: &Module<B>,
@@ -95,7 +97,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         a: &GGLWECiphertext<DataA>,
-        tsk: &GLWETensorKeyExec<DataTsk, B>,
+        tsk: &GGLWETensorKeyExec<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         DataA: DataRef,
@@ -121,8 +123,8 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        ksk: &GLWESwitchingKeyExec<DataKsk, B>,
-        tsk: &GLWETensorKeyExec<DataTsk, B>,
+        ksk: &GGLWESwitchingKeyExec<DataKsk, B>,
+        tsk: &GGLWETensorKeyExec<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxNormalizeTmpBytes,
@@ -135,8 +137,8 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     pub fn keyswitch_inplace<DataKsk: DataRef, DataTsk: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        ksk: &GLWESwitchingKeyExec<DataKsk, B>,
-        tsk: &GLWETensorKeyExec<DataTsk, B>,
+        ksk: &GGLWESwitchingKeyExec<DataKsk, B>,
+        tsk: &GGLWETensorKeyExec<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxNormalizeTmpBytes,
@@ -151,7 +153,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     pub fn expand_row<DataTsk: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        tsk: &GLWETensorKeyExec<DataTsk, B>,
+        tsk: &GGLWETensorKeyExec<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GGSWKeySwitchFamily<B> + VecZnxNormalizeTmpBytes,
@@ -276,7 +278,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        ksk: &GLWESwitchingKeyExec<DataKsk, B>,
+        ksk: &GGLWESwitchingKeyExec<DataKsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxNormalizeTmpBytes,

core/src/keyswitching/glwe_ct.rs

@@ -6,18 +6,10 @@ use backend::hal::{
     layouts::{Backend, DataMut, DataRef, Module, Scratch, VecZnx, VecZnxBig, VecZnxDft, VmpPMat},
 };
 
-use crate::{GLWECiphertext, GLWESwitchingKeyExec, Infos};
-
-pub trait GLWEKeyswitchFamily<B: Backend> = VecZnxDftAllocBytes
-    + VmpApplyTmpBytes
-    + VecZnxBigNormalizeTmpBytes
-    + VmpApplyTmpBytes
-    + VmpApply<B>
-    + VmpApplyAdd<B>
-    + VecZnxDftFromVecZnx<B>
-    + VecZnxDftToVecZnxBigConsume<B>
-    + VecZnxBigAddSmallInplace<B>
-    + VecZnxBigNormalize<B>;
+use crate::{
+    layouts::{GLWECiphertext, Infos, prepared::GGLWESwitchingKeyExec},
+    trait_families::GLWEKeyswitchFamily,
+};
 
 impl GLWECiphertext<Vec<u8>> {
     pub fn keyswitch_scratch_space<B: Backend>(
@@ -52,25 +44,6 @@ impl GLWECiphertext<Vec<u8>> {
         return res_dft + ((ai_dft + vmp) | normalize);
     }
 
-    pub fn keyswitch_from_fourier_scratch_space<B: Backend>(
-        module: &Module<B>,
-        n: usize,
-        basek: usize,
-        k_out: usize,
-        k_in: usize,
-        k_ksk: usize,
-        digits: usize,
-        rank_in: usize,
-        rank_out: usize,
-    ) -> usize
-    where
-        Module<B>: GLWEKeyswitchFamily<B>,
-    {
-        Self::keyswitch_scratch_space(
-            module, n, basek, k_out, k_in, k_ksk, digits, rank_in, rank_out,
-        )
-    }
-
     pub fn keyswitch_inplace_scratch_space<B: Backend>(
         module: &Module<B>,
         n: usize,
@@ -92,7 +65,7 @@ impl<DataSelf: DataRef> GLWECiphertext<DataSelf> {
         &self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
         scratch: &Scratch<B>,
     ) where
         DataLhs: DataRef,
@@ -163,7 +136,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -174,7 +147,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
             self.assert_keyswitch(module, lhs, rhs, scratch);
         }
         let (res_dft, scratch1) = scratch.take_vec_znx_dft(self.n(), self.cols(), rhs.size()); // Todo optimise
-        let res_big: VecZnxBig<_, B> = keyswitch(module, res_dft, lhs, rhs, scratch1);
+        let res_big: VecZnxBig<_, B> = lhs.keyswitch_internal(module, res_dft, rhs, scratch1);
         (0..self.cols()).for_each(|i| {
             module.vec_znx_big_normalize(self.basek(), &mut self.data, i, &res_big, i, scratch1);
         })
@@ -183,7 +156,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn keyswitch_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -196,33 +169,34 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     }
 }
 
-pub(crate) fn keyswitch<B: Backend, DataRes, DataIn, DataKey>(
+impl<D: DataRef> GLWECiphertext<D> {
+    pub(crate) fn keyswitch_internal<B: Backend, DataRes, DataKey>(
+        &self,
         module: &Module<B>,
         res_dft: VecZnxDft<DataRes, B>,
-    lhs: &GLWECiphertext<DataIn>,
-    rhs: &GLWESwitchingKeyExec<DataKey, B>,
+        rhs: &GGLWESwitchingKeyExec<DataKey, B>,
         scratch: &mut Scratch<B>,
     ) -> VecZnxBig<DataRes, B>
     where
         DataRes: DataMut,
-    DataIn: DataRef,
         DataKey: DataRef,
         Module<B>: GLWEKeyswitchFamily<B>,
         Scratch<B>: TakeVecZnxDft<B>,
     {
         if rhs.digits() == 1 {
-        return keyswitch_vmp_one_digit(module, res_dft, &lhs.data, &rhs.key.data, scratch);
+            return keyswitch_vmp_one_digit(module, res_dft, &self.data, &rhs.key.data, scratch);
         }
 
         keyswitch_vmp_multiple_digits(
             module,
             res_dft,
-        &lhs.data,
+            &self.data,
             &rhs.key.data,
             rhs.digits(),
             scratch,
         )
     }
+}
 
 fn keyswitch_vmp_one_digit<B: Backend, DataRes, DataIn, DataVmp>(
     module: &Module<B>,

core/src/keyswitching/lwe_ct.rs

@@ -0,0 +1,68 @@
+use backend::hal::{
+    api::{ScratchAvailable, TakeVecZnx, TakeVecZnxDft, ZnxView, ZnxViewMut, ZnxZero},
+    layouts::{Backend, DataMut, DataRef, Module, Scratch},
+};
+
+use crate::{
+    TakeGLWECt,
+    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::LWESwitchingKeyExec},
+};
+
+use crate::trait_families::GLWEKeyswitchFamily;
+
+impl LWECiphertext<Vec<u8>> {
+    pub fn keyswitch_scratch_space<B: Backend>(
+        module: &Module<B>,
+        n: usize,
+        basek: usize,
+        k_lwe_out: usize,
+        k_lwe_in: usize,
+        k_ksk: usize,
+    ) -> usize
+    where
+        Module<B>: GLWEKeyswitchFamily<B>,
+    {
+        GLWECiphertext::bytes_of(n, basek, k_lwe_out.max(k_lwe_in), 1)
+            + GLWECiphertext::keyswitch_inplace_scratch_space(module, n, basek, k_lwe_out, k_ksk, 1, 1)
+    }
+}
+
+impl<DLwe: DataMut> LWECiphertext<DLwe> {
+    pub fn keyswitch<A, DKs, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        a: &LWECiphertext<A>,
+        ksk: &LWESwitchingKeyExec<DKs, B>,
+        scratch: &mut Scratch<B>,
+    ) where
+        A: DataRef,
+        DKs: DataRef,
+        Module<B>: GLWEKeyswitchFamily<B>,
+        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert!(self.n() <= module.n());
+            assert!(a.n() <= module.n());
+            assert_eq!(self.basek(), a.basek());
+        }
+
+        let max_k: usize = self.k().max(a.k());
+        let basek: usize = self.basek();
+
+        let (mut glwe, scratch1) = scratch.take_glwe_ct(ksk.n(), basek, max_k, 1);
+        glwe.data.zero();
+
+        let n_lwe: usize = a.n();
+
+        (0..a.size()).for_each(|i| {
+            let data_lwe: &[i64] = a.data.at(0, i);
+            glwe.data.at_mut(0, i)[0] = data_lwe[0];
+            glwe.data.at_mut(1, i)[..n_lwe].copy_from_slice(&data_lwe[1..]);
+        });
+
+        glwe.keyswitch_inplace(module, &ksk.0, scratch1);
+
+        self.sample_extract(&glwe);
+    }
+}

core/src/keyswitching/mod.rs

@@ -0,0 +1,4 @@
+mod gglwe_ct;
+mod ggsw_ct;
+mod glwe_ct;
+mod lwe_ct;

core/src/layouts/compressed/gglwe_atk.rs

@@ -0,0 +1,115 @@
+use backend::hal::{
+    api::{FillUniform, Reset, VecZnxCopy, VecZnxFillUniform},
+    layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GGLWEAutomorphismKey, Infos, compressed::GGLWESwitchingKeyCompressed};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+use std::fmt;
+
+use crate::trait_families::Decompress;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GGLWEAutomorphismKeyCompressed<D: Data> {
+    pub(crate) key: GGLWESwitchingKeyCompressed<D>,
+    pub(crate) p: i64,
+}
+
+impl<D: DataRef> fmt::Debug for GGLWEAutomorphismKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GGLWEAutomorphismKeyCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.key.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for GGLWEAutomorphismKeyCompressed<D>
+where
+    MatZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.key.reset();
+        self.p = 0;
+    }
+}
+
+impl<D: DataRef> fmt::Display for GGLWEAutomorphismKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "(AutomorphismKeyCompressed: p={}) {}", self.p, self.key)
+    }
+}
+
+impl GGLWEAutomorphismKeyCompressed<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
+        GGLWEAutomorphismKeyCompressed {
+            key: GGLWESwitchingKeyCompressed::alloc(n, basek, k, rows, digits, rank, rank),
+            p: 0,
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
+        GGLWESwitchingKeyCompressed::<Vec<u8>>::bytes_of(n, basek, k, rows, digits, rank)
+    }
+}
+
+impl<D: Data> Infos for GGLWEAutomorphismKeyCompressed<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.key.inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.key.basek()
+    }
+
+    fn k(&self) -> usize {
+        self.key.k()
+    }
+}
+
+impl<D: Data> GGLWEAutomorphismKeyCompressed<D> {
+    pub fn rank(&self) -> usize {
+        self.key.rank()
+    }
+
+    pub fn digits(&self) -> usize {
+        self.key.digits()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.key.rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.key.rank_out()
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GGLWEAutomorphismKeyCompressed<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.p = reader.read_u64::<LittleEndian>()? as i64;
+        self.key.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GGLWEAutomorphismKeyCompressed<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.p as u64)?;
+        self.key.write_to(writer)
+    }
+}
+
+impl<D: DataMut, DR: DataRef, B: Backend> Decompress<B, GGLWEAutomorphismKeyCompressed<DR>> for GGLWEAutomorphismKey<D> {
+    fn decompress(&mut self, module: &Module<B>, other: &GGLWEAutomorphismKeyCompressed<DR>)
+    where
+        Module<B>: VecZnxFillUniform + VecZnxCopy,
+    {
+        self.key.decompress(module, &other.key);
+        self.p = other.p;
+    }
+}

core/src/layouts/compressed/gglwe_ct.rs

@@ -0,0 +1,252 @@
+use backend::hal::{
+    api::{FillUniform, Reset, VecZnxCopy, VecZnxFillUniform},
+    layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GGLWECiphertext, Infos, compressed::GLWECiphertextCompressed};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+use std::fmt;
+
+use crate::trait_families::Decompress;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GGLWECiphertextCompressed<D: Data> {
+    pub(crate) data: MatZnx<D>,
+    pub(crate) basek: usize,
+    pub(crate) k: usize,
+    pub(crate) rank_out: usize,
+    pub(crate) digits: usize,
+    pub(crate) seed: Vec<[u8; 32]>,
+}
+
+impl<D: DataRef> fmt::Debug for GGLWECiphertextCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GGLWECiphertextCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.data.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for GGLWECiphertextCompressed<D>
+where
+    MatZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.data.reset();
+        self.basek = 0;
+        self.k = 0;
+        self.digits = 0;
+        self.rank_out = 0;
+        self.seed = Vec::new();
+    }
+}
+
+impl<D: DataRef> fmt::Display for GGLWECiphertextCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "(GGLWECiphertextCompressed: basek={} k={} digits={}) {}",
+            self.basek, self.k, self.digits, self.data
+        )
+    }
+}
+
+impl GGLWECiphertextCompressed<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
+        let size: usize = k.div_ceil(basek);
+        debug_assert!(
+            size > digits,
+            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
+            size,
+            digits
+        );
+
+        assert!(
+            rows * digits <= size,
+            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
+            rows,
+            digits,
+            size
+        );
+
+        Self {
+            data: MatZnx::alloc(n, rows, rank_in, 1, size),
+            basek: basek,
+            k,
+            rank_out,
+            digits,
+            seed: vec![[0u8; 32]; rows * rank_in],
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize) -> usize {
+        let size: usize = k.div_ceil(basek);
+        debug_assert!(
+            size > digits,
+            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
+            size,
+            digits
+        );
+
+        assert!(
+            rows * digits <= size,
+            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
+            rows,
+            digits,
+            size
+        );
+
+        MatZnx::alloc_bytes(n, rows, rank_in, 1, rows)
+    }
+}
+
+impl<D: Data> Infos for GGLWECiphertextCompressed<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.data
+    }
+
+    fn basek(&self) -> usize {
+        self.basek
+    }
+
+    fn k(&self) -> usize {
+        self.k
+    }
+}
+
+impl<D: Data> GGLWECiphertextCompressed<D> {
+    pub fn rank(&self) -> usize {
+        self.rank_out
+    }
+
+    pub fn digits(&self) -> usize {
+        self.digits
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.data.cols_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.rank_out
+    }
+}
+
+impl<D: DataRef> GGLWECiphertextCompressed<D> {
+    pub(crate) fn at(&self, row: usize, col: usize) -> GLWECiphertextCompressed<&[u8]> {
+        GLWECiphertextCompressed {
+            data: self.data.at(row, col),
+            basek: self.basek,
+            k: self.k,
+            rank: self.rank_out,
+            seed: self.seed[self.rank_in() * row + col],
+        }
+    }
+}
+
+impl<D: DataMut> GGLWECiphertextCompressed<D> {
+    pub(crate) fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertextCompressed<&mut [u8]> {
+        let rank_in: usize = self.rank_in();
+        GLWECiphertextCompressed {
+            data: self.data.at_mut(row, col),
+            basek: self.basek,
+            k: self.k,
+            rank: self.rank_out,
+            seed: self.seed[rank_in * row + col], // Warning: value is copied and not borrow mut
+        }
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GGLWECiphertextCompressed<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.k = reader.read_u64::<LittleEndian>()? as usize;
+        self.basek = reader.read_u64::<LittleEndian>()? as usize;
+        self.digits = reader.read_u64::<LittleEndian>()? as usize;
+        self.rank_out = reader.read_u64::<LittleEndian>()? as usize;
+        let seed_len = reader.read_u64::<LittleEndian>()? as usize;
+        self.seed = vec![[0u8; 32]; seed_len];
+        for s in &mut self.seed {
+            reader.read_exact(s)?;
+        }
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GGLWECiphertextCompressed<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.k as u64)?;
+        writer.write_u64::<LittleEndian>(self.basek as u64)?;
+        writer.write_u64::<LittleEndian>(self.digits as u64)?;
+        writer.write_u64::<LittleEndian>(self.rank_out as u64)?;
+        writer.write_u64::<LittleEndian>(self.seed.len() as u64)?;
+        for s in &self.seed {
+            writer.write_all(s)?;
+        }
+        self.data.write_to(writer)
+    }
+}
+
+impl<D: DataMut, B: Backend, DR: DataRef> Decompress<B, GGLWECiphertextCompressed<DR>> for GGLWECiphertext<D> {
+    fn decompress(&mut self, module: &Module<B>, other: &GGLWECiphertextCompressed<DR>)
+    where
+        Module<B>: VecZnxFillUniform + VecZnxCopy,
+    {
+        #[cfg(debug_assertions)]
+        {
+            use backend::hal::api::ZnxInfos;
+
+            assert_eq!(
+                self.n(),
+                other.data.n(),
+                "invalid receiver: self.n()={} != other.n()={}",
+                self.n(),
+                other.data.n()
+            );
+            assert_eq!(
+                self.size(),
+                other.size(),
+                "invalid receiver: self.size()={} != other.size()={}",
+                self.size(),
+                other.size()
+            );
+            assert_eq!(
+                self.rank_in(),
+                other.rank_in(),
+                "invalid receiver: self.rank_in()={} != other.rank_in()={}",
+                self.rank_in(),
+                other.rank_in()
+            );
+            assert_eq!(
+                self.rank_out(),
+                other.rank_out(),
+                "invalid receiver: self.rank_out()={} != other.rank_out()={}",
+                self.rank_out(),
+                other.rank_out()
+            );
+
+            assert_eq!(
+                self.rows(),
+                other.rows(),
+                "invalid receiver: self.rows()={} != other.rows()={}",
+                self.rows(),
+                other.rows()
+            );
+        }
+
+        let rank_in: usize = self.rank_in();
+        let rows: usize = self.rows();
+
+        (0..rank_in).for_each(|col_i| {
+            (0..rows).for_each(|row_i| {
+                self.at_mut(row_i, col_i)
+                    .decompress(module, &other.at(row_i, col_i));
+            });
+        });
+    }
+}

core/src/layouts/compressed/gglwe_ksk.rs

@@ -0,0 +1,126 @@
+use backend::hal::{
+    api::{FillUniform, Reset, VecZnxCopy, VecZnxFillUniform},
+    layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
+};
+
+use crate::{
+    layouts::{GGLWESwitchingKey, Infos, compressed::GGLWECiphertextCompressed},
+    trait_families::Decompress,
+};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+use std::fmt;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GGLWESwitchingKeyCompressed<D: Data> {
+    pub(crate) key: GGLWECiphertextCompressed<D>,
+    pub(crate) sk_in_n: usize,  // Degree of sk_in
+    pub(crate) sk_out_n: usize, // Degree of sk_out
+}
+
+impl<D: DataRef> fmt::Debug for GGLWESwitchingKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GGLWESwitchingKeyCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.key.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for GGLWESwitchingKeyCompressed<D>
+where
+    MatZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.key.reset();
+        self.sk_in_n = 0;
+        self.sk_out_n = 0;
+    }
+}
+
+impl<D: DataRef> fmt::Display for GGLWESwitchingKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "(GLWESwitchingKeyCompressed: sk_in_n={} sk_out_n={}) {}",
+            self.sk_in_n, self.sk_out_n, self.key.data
+        )
+    }
+}
+
+impl<D: Data> Infos for GGLWESwitchingKeyCompressed<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.key.inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.key.basek()
+    }
+
+    fn k(&self) -> usize {
+        self.key.k()
+    }
+}
+
+impl<D: Data> GGLWESwitchingKeyCompressed<D> {
+    pub fn rank(&self) -> usize {
+        self.key.rank()
+    }
+
+    pub fn digits(&self) -> usize {
+        self.key.digits()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.key.rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.key.rank_out()
+    }
+}
+
+impl GGLWESwitchingKeyCompressed<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
+        GGLWESwitchingKeyCompressed {
+            key: GGLWECiphertextCompressed::alloc(n, basek, k, rows, digits, rank_in, rank_out),
+            sk_in_n: 0,
+            sk_out_n: 0,
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize) -> usize {
+        GGLWECiphertextCompressed::bytes_of(n, basek, k, rows, digits, rank_in)
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GGLWESwitchingKeyCompressed<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.sk_in_n = reader.read_u64::<LittleEndian>()? as usize;
+        self.sk_out_n = reader.read_u64::<LittleEndian>()? as usize;
+        self.key.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GGLWESwitchingKeyCompressed<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.sk_in_n as u64)?;
+        writer.write_u64::<LittleEndian>(self.sk_out_n as u64)?;
+        self.key.write_to(writer)
+    }
+}
+
+impl<D: DataMut, DR: DataRef, B: Backend> Decompress<B, GGLWESwitchingKeyCompressed<DR>> for GGLWESwitchingKey<D> {
+    fn decompress(&mut self, module: &Module<B>, other: &GGLWESwitchingKeyCompressed<DR>)
+    where
+        Module<B>: VecZnxFillUniform + VecZnxCopy,
+    {
+        self.key.decompress(module, &other.key);
+        self.sk_in_n = other.sk_in_n;
+        self.sk_out_n = other.sk_out_n;
+    }
+}

core/src/layouts/compressed/gglwe_tsk.rs

@@ -0,0 +1,163 @@
+use backend::hal::{
+    api::{FillUniform, Reset, VecZnxCopy, VecZnxFillUniform},
+    layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GGLWETensorKey, Infos, compressed::GGLWESwitchingKeyCompressed};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+use std::fmt;
+
+use crate::trait_families::Decompress;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GGLWETensorKeyCompressed<D: Data> {
+    pub(crate) keys: Vec<GGLWESwitchingKeyCompressed<D>>,
+}
+
+impl<D: DataRef> fmt::Debug for GGLWETensorKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GGLWETensorKeyCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.keys
+            .iter_mut()
+            .for_each(|key: &mut GGLWESwitchingKeyCompressed<D>| key.fill_uniform(source))
+    }
+}
+
+impl<D: DataMut> Reset for GGLWETensorKeyCompressed<D>
+where
+    MatZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.keys
+            .iter_mut()
+            .for_each(|key: &mut GGLWESwitchingKeyCompressed<D>| key.reset())
+    }
+}
+
+impl<D: DataRef> fmt::Display for GGLWETensorKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(f, "(GLWETensorKeyCompressed)",)?;
+        for (i, key) in self.keys.iter().enumerate() {
+            write!(f, "{}: {}", i, key)?;
+        }
+        Ok(())
+    }
+}
+
+impl GGLWETensorKeyCompressed<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
+        let mut keys: Vec<GGLWESwitchingKeyCompressed<Vec<u8>>> = Vec::new();
+        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
+        (0..pairs).for_each(|_| {
+            keys.push(GGLWESwitchingKeyCompressed::alloc(
+                n, basek, k, rows, digits, 1, rank,
+            ));
+        });
+        Self { keys: keys }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
+        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
+        pairs * GGLWESwitchingKeyCompressed::bytes_of(n, basek, k, rows, digits, 1)
+    }
+}
+
+impl<D: Data> Infos for GGLWETensorKeyCompressed<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.keys[0].inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.keys[0].basek()
+    }
+
+    fn k(&self) -> usize {
+        self.keys[0].k()
+    }
+}
+
+impl<D: Data> GGLWETensorKeyCompressed<D> {
+    pub fn rank(&self) -> usize {
+        self.keys[0].rank()
+    }
+
+    pub fn digits(&self) -> usize {
+        self.keys[0].digits()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.keys[0].rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.keys[0].rank_out()
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GGLWETensorKeyCompressed<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        let len: usize = reader.read_u64::<LittleEndian>()? as usize;
+        if self.keys.len() != len {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                format!("self.keys.len()={} != read len={}", self.keys.len(), len),
+            ));
+        }
+        for key in &mut self.keys {
+            key.read_from(reader)?;
+        }
+        Ok(())
+    }
+}
+
+impl<D: DataRef> WriterTo for GGLWETensorKeyCompressed<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
+        for key in &self.keys {
+            key.write_to(writer)?;
+        }
+        Ok(())
+    }
+}
+
+impl<D: DataMut> GGLWETensorKeyCompressed<D> {
+    pub(crate) fn at_mut(&mut self, mut i: usize, mut j: usize) -> &mut GGLWESwitchingKeyCompressed<D> {
+        if i > j {
+            std::mem::swap(&mut i, &mut j);
+        };
+        let rank: usize = self.rank();
+        &mut self.keys[i * rank + j - (i * (i + 1) / 2)]
+    }
+}
+
+impl<D: DataMut, DR: DataRef, B: Backend> Decompress<B, GGLWETensorKeyCompressed<DR>> for GGLWETensorKey<D> {
+    fn decompress(&mut self, module: &Module<B>, other: &GGLWETensorKeyCompressed<DR>)
+    where
+        Module<B>: VecZnxFillUniform + VecZnxCopy,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(
+                self.keys.len(),
+                other.keys.len(),
+                "invalid receiver: self.keys.len()={} != other.keys.len()={}",
+                self.keys.len(),
+                other.keys.len()
+            );
+        }
+
+        self.keys
+            .iter_mut()
+            .zip(other.keys.iter())
+            .for_each(|(a, b)| {
+                a.decompress(module, b);
+            });
+    }
+}

core/src/layouts/compressed/ggsw_ct.rs

@@ -3,7 +3,10 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
 };
 
-use crate::{Decompress, GGSWCiphertext, GLWECiphertextCompressed, Infos};
+use crate::{
+    layouts::{GGSWCiphertext, Infos, compressed::GLWECiphertextCompressed},
+    trait_families::Decompress,
+};
 use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 use std::fmt;
 

core/src/layouts/compressed/glwe_ct.rs

@@ -1,160 +1,15 @@
 use backend::hal::{
     api::{FillUniform, Reset, VecZnxCopy, VecZnxFillUniform, ZnxInfos},
-    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, VecZnx, VecZnxToMut, VecZnxToRef, WriterTo},
+    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, VecZnx, WriterTo},
 };
 use sampling::source::Source;
 
-use crate::{Decompress, GLWEOps, Infos, SetMetaData};
-use std::fmt;
-
-#[derive(PartialEq, Eq, Clone)]
-pub struct GLWECiphertext<D: Data> {
-    pub data: VecZnx<D>,
-    pub basek: usize,
-    pub k: usize,
-}
-
-impl<D: DataRef> fmt::Debug for GLWECiphertext<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: DataRef> fmt::Display for GLWECiphertext<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "GLWECiphertext: basek={} k={}: {}",
-            self.basek(),
-            self.k(),
-            self.data
-        )
-    }
-}
-
-impl<D: DataMut> Reset for GLWECiphertext<D>
-where
-    VecZnx<D>: Reset,
-{
-    fn reset(&mut self) {
-        self.data.reset();
-        self.basek = 0;
-        self.k = 0;
-    }
-}
-
-impl<D: DataMut> FillUniform for GLWECiphertext<D>
-where
-    VecZnx<D>: FillUniform,
-{
-    fn fill_uniform(&mut self, source: &mut Source) {
-        self.data.fill_uniform(source);
-    }
-}
-
-impl GLWECiphertext<Vec<u8>> {
-    pub fn alloc(n: usize, basek: usize, k: usize, rank: usize) -> Self {
-        Self {
-            data: VecZnx::alloc(n, rank + 1, k.div_ceil(basek)),
-            basek,
-            k,
-        }
-    }
-
-    pub fn bytes_of(n: usize, basek: usize, k: usize, rank: usize) -> usize {
-        VecZnx::alloc_bytes(n, rank + 1, k.div_ceil(basek))
-    }
-}
-
-impl<D: Data> Infos for GLWECiphertext<D> {
-    type Inner = VecZnx<D>;
-
-    fn inner(&self) -> &Self::Inner {
-        &self.data
-    }
-
-    fn basek(&self) -> usize {
-        self.basek
-    }
-
-    fn k(&self) -> usize {
-        self.k
-    }
-}
-
-impl<D: Data> GLWECiphertext<D> {
-    pub fn rank(&self) -> usize {
-        self.cols() - 1
-    }
-}
-
-impl<D: DataRef> GLWECiphertext<D> {
-    pub fn clone(&self) -> GLWECiphertext<Vec<u8>> {
-        GLWECiphertext {
-            data: self.data.clone(),
-            basek: self.basek(),
-            k: self.k(),
-        }
-    }
-}
-
-impl<D: DataMut> SetMetaData for GLWECiphertext<D> {
-    fn set_k(&mut self, k: usize) {
-        self.k = k
-    }
-
-    fn set_basek(&mut self, basek: usize) {
-        self.basek = basek
-    }
-}
-
-pub trait GLWECiphertextToRef: Infos {
-    fn to_ref(&self) -> GLWECiphertext<&[u8]>;
-}
-
-impl<D: DataRef> GLWECiphertextToRef for GLWECiphertext<D> {
-    fn to_ref(&self) -> GLWECiphertext<&[u8]> {
-        GLWECiphertext {
-            data: self.data.to_ref(),
-            basek: self.basek,
-            k: self.k,
-        }
-    }
-}
-
-pub trait GLWECiphertextToMut: Infos {
-    fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]>;
-}
-
-impl<D: DataMut> GLWECiphertextToMut for GLWECiphertext<D> {
-    fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]> {
-        GLWECiphertext {
-            data: self.data.to_mut(),
-            basek: self.basek,
-            k: self.k,
-        }
-    }
-}
-
-impl<D: DataMut> GLWEOps for GLWECiphertext<D> where GLWECiphertext<D>: GLWECiphertextToMut + Infos + SetMetaData {}
-
+use crate::{
+    layouts::{GLWECiphertext, Infos},
+    trait_families::{Decompress, DecompressFamily},
+};
 use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
-
-impl<D: DataMut> ReaderFrom for GLWECiphertext<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        self.k = reader.read_u64::<LittleEndian>()? as usize;
-        self.basek = reader.read_u64::<LittleEndian>()? as usize;
-        self.data.read_from(reader)
-    }
-}
-
-impl<D: DataRef> WriterTo for GLWECiphertext<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        writer.write_u64::<LittleEndian>(self.k as u64)?;
-        writer.write_u64::<LittleEndian>(self.basek as u64)?;
-        self.data.write_to(writer)
-    }
-}
+use std::fmt;
 
 #[derive(PartialEq, Eq, Clone)]
 pub struct GLWECiphertextCompressed<D: Data> {
@@ -185,10 +40,7 @@ impl<D: DataRef> fmt::Display for GLWECiphertextCompressed<D> {
     }
 }
 
-impl<D: DataMut> Reset for GLWECiphertextCompressed<D>
-where
-    VecZnx<D>: Reset,
-{
+impl<D: DataMut> Reset for GLWECiphertextCompressed<D> {
     fn reset(&mut self) {
         self.data.reset();
         self.basek = 0;
@@ -198,10 +50,7 @@ where
     }
 }
 
-impl<D: DataMut> FillUniform for GLWECiphertextCompressed<D>
-where
-    VecZnx<D>: FillUniform,
-{
+impl<D: DataMut> FillUniform for GLWECiphertextCompressed<D> {
     fn fill_uniform(&mut self, source: &mut Source) {
         self.data.fill_uniform(source);
     }
@@ -268,7 +117,7 @@ impl<D: DataRef> WriterTo for GLWECiphertextCompressed<D> {
 impl<D: DataMut, B: Backend, DR: DataRef> Decompress<B, GLWECiphertextCompressed<DR>> for GLWECiphertext<D> {
     fn decompress(&mut self, module: &Module<B>, other: &GLWECiphertextCompressed<DR>)
     where
-        Module<B>: VecZnxFillUniform + VecZnxCopy,
+        Module<B>: DecompressFamily<B>,
     {
         #[cfg(debug_assertions)]
         {
@@ -307,7 +156,7 @@ impl<D: DataMut> GLWECiphertext<D> {
         source: &mut Source,
     ) where
         DataOther: DataRef,
-        Module<B>: VecZnxFillUniform + VecZnxCopy,
+        Module<B>: DecompressFamily<B>,
     {
         #[cfg(debug_assertions)]
         {

core/src/layouts/compressed/glwe_to_lwe_ksk.rs

@@ -0,0 +1,98 @@
+use std::fmt;
+
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GLWEToLWESwitchingKey, Infos, compressed::GGLWESwitchingKeyCompressed};
+
+use crate::trait_families::{GGLWEEncryptSkFamily, GLWESecretExecModuleFamily};
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GLWEToLWESwitchingKeyCompressed<D: Data>(pub(crate) GGLWESwitchingKeyCompressed<D>);
+
+impl<D: DataRef> fmt::Debug for GLWEToLWESwitchingKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GLWEToLWESwitchingKeyCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.0.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for GLWEToLWESwitchingKeyCompressed<D> {
+    fn reset(&mut self) {
+        self.0.reset();
+    }
+}
+
+impl<D: DataRef> fmt::Display for GLWEToLWESwitchingKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "(GLWEToLWESwitchingKeyCompressed) {}", self.0)
+    }
+}
+
+impl<D: Data> Infos for GLWEToLWESwitchingKeyCompressed<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.0.inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.0.basek()
+    }
+
+    fn k(&self) -> usize {
+        self.0.k()
+    }
+}
+
+impl<D: Data> GLWEToLWESwitchingKeyCompressed<D> {
+    pub fn digits(&self) -> usize {
+        self.0.digits()
+    }
+
+    pub fn rank(&self) -> usize {
+        self.0.rank()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.0.rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.0.rank_out()
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GLWEToLWESwitchingKeyCompressed<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.0.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GLWEToLWESwitchingKeyCompressed<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        self.0.write_to(writer)
+    }
+}
+
+impl GLWEToLWESwitchingKeyCompressed<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, rank_in: usize) -> Self {
+        Self(GGLWESwitchingKeyCompressed::alloc(
+            n, basek, k, rows, 1, rank_in, 1,
+        ))
+    }
+
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank_in: usize) -> usize
+    where
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        GLWEToLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank_in)
+    }
+}

core/src/layouts/compressed/lwe_ct.rs

@@ -0,0 +1,134 @@
+use std::fmt;
+
+use backend::hal::{
+    api::{FillUniform, Reset, VecZnxFillUniform, ZnxInfos, ZnxView, ZnxViewMut},
+    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, VecZnx, WriterTo},
+};
+use sampling::source::Source;
+
+use crate::{
+    layouts::{Infos, LWECiphertext, SetMetaData},
+    trait_families::Decompress,
+};
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct LWECiphertextCompressed<D: Data> {
+    pub(crate) data: VecZnx<D>,
+    pub(crate) k: usize,
+    pub(crate) basek: usize,
+    pub(crate) seed: [u8; 32],
+}
+
+impl<D: DataRef> fmt::Debug for LWECiphertextCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataRef> fmt::Display for LWECiphertextCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "LWECiphertextCompressed: basek={} k={} seed={:?}: {}",
+            self.basek(),
+            self.k(),
+            self.seed,
+            self.data
+        )
+    }
+}
+
+impl<D: DataMut> Reset for LWECiphertextCompressed<D>
+where
+    VecZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.data.reset();
+        self.basek = 0;
+        self.k = 0;
+        self.seed = [0u8; 32];
+    }
+}
+
+impl<D: DataMut> FillUniform for LWECiphertextCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut Source) {
+        self.data.fill_uniform(source);
+    }
+}
+
+impl LWECiphertextCompressed<Vec<u8>> {
+    pub fn alloc(basek: usize, k: usize) -> Self {
+        Self {
+            data: VecZnx::alloc(1, 1, k.div_ceil(basek)),
+            k: k,
+            basek: basek,
+            seed: [0u8; 32],
+        }
+    }
+}
+
+impl<D: Data> Infos for LWECiphertextCompressed<D>
+where
+    VecZnx<D>: ZnxInfos,
+{
+    type Inner = VecZnx<D>;
+
+    fn n(&self) -> usize {
+        &self.inner().n() - 1
+    }
+
+    fn inner(&self) -> &Self::Inner {
+        &self.data
+    }
+
+    fn basek(&self) -> usize {
+        self.basek
+    }
+
+    fn k(&self) -> usize {
+        self.k
+    }
+}
+
+impl<DataSelf: DataMut> SetMetaData for LWECiphertextCompressed<DataSelf> {
+    fn set_k(&mut self, k: usize) {
+        self.k = k
+    }
+
+    fn set_basek(&mut self, basek: usize) {
+        self.basek = basek
+    }
+}
+
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+impl<D: DataMut> ReaderFrom for LWECiphertextCompressed<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.k = reader.read_u64::<LittleEndian>()? as usize;
+        self.basek = reader.read_u64::<LittleEndian>()? as usize;
+        reader.read(&mut self.seed)?;
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for LWECiphertextCompressed<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.k as u64)?;
+        writer.write_u64::<LittleEndian>(self.basek as u64)?;
+        writer.write_all(&self.seed)?;
+        self.data.write_to(writer)
+    }
+}
+
+impl<D: DataMut, B: Backend, DR: DataRef> Decompress<B, LWECiphertextCompressed<DR>> for LWECiphertext<D> {
+    fn decompress(&mut self, module: &Module<B>, other: &LWECiphertextCompressed<DR>)
+    where
+        Module<B>: VecZnxFillUniform,
+    {
+        let mut source = Source::new(other.seed);
+        module.vec_znx_fill_uniform(other.basek(), &mut self.data, 0, other.k(), &mut source);
+        (0..self.size()).for_each(|i| {
+            self.data.at_mut(0, i)[0] = other.data.at(0, i)[0];
+        });
+    }
+}

core/src/layouts/compressed/lwe_ksk.rs

@@ -0,0 +1,106 @@
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{Infos, LWESwitchingKey, compressed::GGLWESwitchingKeyCompressed};
+use std::fmt;
+
+use crate::trait_families::{Decompress, GGLWEEncryptSkFamily, GLWESecretExecModuleFamily};
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct LWESwitchingKeyCompressed<D: Data>(pub(crate) GGLWESwitchingKeyCompressed<D>);
+
+impl<D: DataRef> fmt::Debug for LWESwitchingKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for LWESwitchingKeyCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.0.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for LWESwitchingKeyCompressed<D> {
+    fn reset(&mut self) {
+        self.0.reset();
+    }
+}
+
+impl<D: DataRef> fmt::Display for LWESwitchingKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "(LWESwitchingKeyCompressed) {}", self.0)
+    }
+}
+
+impl<D: Data> Infos for LWESwitchingKeyCompressed<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.0.inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.0.basek()
+    }
+
+    fn k(&self) -> usize {
+        self.0.k()
+    }
+}
+
+impl<D: Data> LWESwitchingKeyCompressed<D> {
+    pub fn digits(&self) -> usize {
+        self.0.digits()
+    }
+
+    pub fn rank(&self) -> usize {
+        self.0.rank()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.0.rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.0.rank_out()
+    }
+}
+
+impl<D: DataMut> ReaderFrom for LWESwitchingKeyCompressed<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.0.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for LWESwitchingKeyCompressed<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        self.0.write_to(writer)
+    }
+}
+
+impl LWESwitchingKeyCompressed<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize) -> Self {
+        Self(GGLWESwitchingKeyCompressed::alloc(
+            n, basek, k, rows, 1, 1, 1,
+        ))
+    }
+
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize) -> usize
+    where
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        LWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k)
+    }
+}
+
+impl<D: DataMut, DR: DataRef, B: Backend> Decompress<B, LWESwitchingKeyCompressed<DR>> for LWESwitchingKey<D> {
+    fn decompress(&mut self, module: &Module<B>, other: &LWESwitchingKeyCompressed<DR>)
+    where
+        Module<B>: crate::trait_families::DecompressFamily<B>,
+    {
+        self.0.decompress(module, &other.0);
+    }
+}

core/src/layouts/compressed/lwe_to_glwe_ksk.rs

@@ -0,0 +1,109 @@
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Backend, Data, DataMut, DataRef, MatZnx, Module, ReaderFrom, WriterTo},
+};
+
+use crate::{
+    layouts::{Infos, LWEToGLWESwitchingKey, compressed::GGLWESwitchingKeyCompressed},
+    trait_families::Decompress,
+};
+use std::fmt;
+
+use crate::trait_families::{GGLWEEncryptSkFamily, GLWESecretExecModuleFamily};
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct LWEToGLWESwitchingKeyCompressed<D: Data>(pub(crate) GGLWESwitchingKeyCompressed<D>);
+
+impl<D: DataRef> fmt::Debug for LWEToGLWESwitchingKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for LWEToGLWESwitchingKeyCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.0.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for LWEToGLWESwitchingKeyCompressed<D> {
+    fn reset(&mut self) {
+        self.0.reset();
+    }
+}
+
+impl<D: DataRef> fmt::Display for LWEToGLWESwitchingKeyCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "(LWEToGLWESwitchingKeyCompressed) {}", self.0)
+    }
+}
+
+impl<D: Data> Infos for LWEToGLWESwitchingKeyCompressed<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.0.inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.0.basek()
+    }
+
+    fn k(&self) -> usize {
+        self.0.k()
+    }
+}
+
+impl<D: Data> LWEToGLWESwitchingKeyCompressed<D> {
+    pub fn digits(&self) -> usize {
+        self.0.digits()
+    }
+
+    pub fn rank(&self) -> usize {
+        self.0.rank()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.0.rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.0.rank_out()
+    }
+}
+
+impl<D: DataMut> ReaderFrom for LWEToGLWESwitchingKeyCompressed<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.0.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for LWEToGLWESwitchingKeyCompressed<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        self.0.write_to(writer)
+    }
+}
+
+impl LWEToGLWESwitchingKeyCompressed<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, rank_out: usize) -> Self {
+        Self(GGLWESwitchingKeyCompressed::alloc(
+            n, basek, k, rows, 1, 1, rank_out,
+        ))
+    }
+
+    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank_out: usize) -> usize
+    where
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+    {
+        LWEToGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank_out)
+    }
+}
+
+impl<D: DataMut, DR: DataRef, B: Backend> Decompress<B, LWEToGLWESwitchingKeyCompressed<DR>> for LWEToGLWESwitchingKey<D> {
+    fn decompress(&mut self, module: &Module<B>, other: &LWEToGLWESwitchingKeyCompressed<DR>)
+    where
+        Module<B>: crate::trait_families::DecompressFamily<B>,
+    {
+        self.0.decompress(module, &other.0);
+    }
+}

core/src/layouts/compressed/mod.rs

@@ -0,0 +1,21 @@
+mod gglwe_atk;
+mod gglwe_ct;
+mod gglwe_ksk;
+mod gglwe_tsk;
+mod ggsw_ct;
+mod glwe_ct;
+mod glwe_to_lwe_ksk;
+mod lwe_ct;
+mod lwe_ksk;
+mod lwe_to_glwe_ksk;
+
+pub use gglwe_atk::*;
+pub use gglwe_ct::*;
+pub use gglwe_ksk::*;
+pub use gglwe_tsk::*;
+pub use ggsw_ct::*;
+pub use glwe_ct::*;
+pub use glwe_to_lwe_ksk::*;
+pub use lwe_ct::*;
+pub use lwe_ksk::*;
+pub use lwe_to_glwe_ksk::*;

core/src/layouts/gglwe_atk.rs

@@ -0,0 +1,120 @@
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GLWECiphertext, GGLWESwitchingKey, Infos};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+use std::fmt;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GGLWEAutomorphismKey<D: Data> {
+    pub(crate) key: GGLWESwitchingKey<D>,
+    pub(crate) p: i64,
+}
+
+impl<D: DataRef> fmt::Debug for GGLWEAutomorphismKey<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GGLWEAutomorphismKey<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.key.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for GGLWEAutomorphismKey<D>
+where
+    MatZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.key.reset();
+        self.p = 0;
+    }
+}
+
+impl<D: DataRef> fmt::Display for GGLWEAutomorphismKey<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "(AutomorphismKey: p={}) {}", self.p, self.key)
+    }
+}
+
+impl GGLWEAutomorphismKey<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
+        GGLWEAutomorphismKey {
+            key: GGLWESwitchingKey::alloc(n, basek, k, rows, digits, rank, rank),
+            p: 0,
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
+        GGLWESwitchingKey::bytes_of(n, basek, k, rows, digits, rank, rank)
+    }
+}
+
+impl<D: Data> Infos for GGLWEAutomorphismKey<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.key.inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.key.basek()
+    }
+
+    fn k(&self) -> usize {
+        self.key.k()
+    }
+}
+
+impl<D: Data> GGLWEAutomorphismKey<D> {
+    pub fn p(&self) -> i64 {
+        self.p
+    }
+
+    pub fn digits(&self) -> usize {
+        self.key.digits()
+    }
+
+    pub fn rank(&self) -> usize {
+        self.key.rank()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.key.rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.key.rank_out()
+    }
+}
+
+impl<D: DataRef> GGLWEAutomorphismKey<D> {
+    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
+        self.key.at(row, col)
+    }
+}
+
+impl<D: DataMut> GGLWEAutomorphismKey<D> {
+    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
+        self.key.at_mut(row, col)
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GGLWEAutomorphismKey<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.p = reader.read_u64::<LittleEndian>()? as i64;
+        self.key.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GGLWEAutomorphismKey<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.p as u64)?;
+        self.key.write_to(writer)
+    }
+}

core/src/layouts/gglwe_ct.rs

@@ -0,0 +1,167 @@
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GLWECiphertext, Infos};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+use std::fmt;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GGLWECiphertext<D: Data> {
+    pub(crate) data: MatZnx<D>,
+    pub(crate) basek: usize,
+    pub(crate) k: usize,
+    pub(crate) digits: usize,
+}
+
+impl<D: DataRef> fmt::Debug for GGLWECiphertext<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GGLWECiphertext<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.data.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for GGLWECiphertext<D> {
+    fn reset(&mut self) {
+        self.data.reset();
+        self.basek = 0;
+        self.k = 0;
+        self.digits = 0;
+    }
+}
+
+impl<D: DataRef> fmt::Display for GGLWECiphertext<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "(GGLWECiphertext: basek={} k={} digits={}) {}",
+            self.basek, self.k, self.digits, self.data
+        )
+    }
+}
+
+impl<D: DataRef> GGLWECiphertext<D> {
+    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
+        GLWECiphertext {
+            data: self.data.at(row, col),
+            basek: self.basek,
+            k: self.k,
+        }
+    }
+}
+
+impl<D: DataMut> GGLWECiphertext<D> {
+    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
+        GLWECiphertext {
+            data: self.data.at_mut(row, col),
+            basek: self.basek,
+            k: self.k,
+        }
+    }
+}
+
+impl GGLWECiphertext<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
+        let size: usize = k.div_ceil(basek);
+        debug_assert!(
+            size > digits,
+            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
+            size,
+            digits
+        );
+
+        assert!(
+            rows * digits <= size,
+            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
+            rows,
+            digits,
+            size
+        );
+
+        Self {
+            data: MatZnx::alloc(n, rows, rank_in, rank_out + 1, size),
+            basek: basek,
+            k,
+            digits,
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> usize {
+        let size: usize = k.div_ceil(basek);
+        debug_assert!(
+            size > digits,
+            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
+            size,
+            digits
+        );
+
+        assert!(
+            rows * digits <= size,
+            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
+            rows,
+            digits,
+            size
+        );
+
+        MatZnx::alloc_bytes(n, rows, rank_in, rank_out + 1, rows)
+    }
+}
+
+impl<D: Data> Infos for GGLWECiphertext<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.data
+    }
+
+    fn basek(&self) -> usize {
+        self.basek
+    }
+
+    fn k(&self) -> usize {
+        self.k
+    }
+}
+
+impl<D: Data> GGLWECiphertext<D> {
+    pub fn rank(&self) -> usize {
+        self.data.cols_out() - 1
+    }
+
+    pub fn digits(&self) -> usize {
+        self.digits
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.data.cols_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.data.cols_out() - 1
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GGLWECiphertext<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.k = reader.read_u64::<LittleEndian>()? as usize;
+        self.basek = reader.read_u64::<LittleEndian>()? as usize;
+        self.digits = reader.read_u64::<LittleEndian>()? as usize;
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GGLWECiphertext<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.k as u64)?;
+        writer.write_u64::<LittleEndian>(self.basek as u64)?;
+        writer.write_u64::<LittleEndian>(self.digits as u64)?;
+        self.data.write_to(writer)
+    }
+}

core/src/layouts/gglwe_ksk.rs

@@ -0,0 +1,133 @@
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GGLWECiphertext, GLWECiphertext, Infos};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+use std::fmt;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GGLWESwitchingKey<D: Data> {
+    pub(crate) key: GGLWECiphertext<D>,
+    pub(crate) sk_in_n: usize,  // Degree of sk_in
+    pub(crate) sk_out_n: usize, // Degree of sk_out
+}
+
+impl<D: DataRef> fmt::Debug for GGLWESwitchingKey<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataRef> fmt::Display for GGLWESwitchingKey<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "(GLWESwitchingKey: sk_in_n={} sk_out_n={}) {}",
+            self.sk_in_n, self.sk_out_n, self.key.data
+        )
+    }
+}
+
+impl<D: DataMut> FillUniform for GGLWESwitchingKey<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.key.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for GGLWESwitchingKey<D>
+where
+    MatZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.key.reset();
+        self.sk_in_n = 0;
+        self.sk_out_n = 0;
+    }
+}
+
+impl GGLWESwitchingKey<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
+        GGLWESwitchingKey {
+            key: GGLWECiphertext::alloc(n, basek, k, rows, digits, rank_in, rank_out),
+            sk_in_n: 0,
+            sk_out_n: 0,
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> usize {
+        GGLWECiphertext::<Vec<u8>>::bytes_of(n, basek, k, rows, digits, rank_in, rank_out)
+    }
+}
+
+impl<D: Data> Infos for GGLWESwitchingKey<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        self.key.inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.key.basek()
+    }
+
+    fn k(&self) -> usize {
+        self.key.k()
+    }
+}
+
+impl<D: Data> GGLWESwitchingKey<D> {
+    pub fn rank(&self) -> usize {
+        self.key.data.cols_out() - 1
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.key.data.cols_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.key.data.cols_out() - 1
+    }
+
+    pub fn digits(&self) -> usize {
+        self.key.digits()
+    }
+
+    pub fn sk_degree_in(&self) -> usize {
+        self.sk_in_n
+    }
+
+    pub fn sk_degree_out(&self) -> usize {
+        self.sk_out_n
+    }
+}
+
+impl<D: DataRef> GGLWESwitchingKey<D> {
+    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
+        self.key.at(row, col)
+    }
+}
+
+impl<D: DataMut> GGLWESwitchingKey<D> {
+    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
+        self.key.at_mut(row, col)
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GGLWESwitchingKey<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.sk_in_n = reader.read_u64::<LittleEndian>()? as usize;
+        self.sk_out_n = reader.read_u64::<LittleEndian>()? as usize;
+        self.key.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GGLWESwitchingKey<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.sk_in_n as u64)?;
+        writer.write_u64::<LittleEndian>(self.sk_out_n as u64)?;
+        self.key.write_to(writer)
+    }
+}

core/src/layouts/gglwe_tsk.rs

@@ -0,0 +1,147 @@
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GGLWESwitchingKey, Infos};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+use std::fmt;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GGLWETensorKey<D: Data> {
+    pub(crate) keys: Vec<GGLWESwitchingKey<D>>,
+}
+
+impl<D: DataRef> fmt::Debug for GGLWETensorKey<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GGLWETensorKey<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.keys
+            .iter_mut()
+            .for_each(|key: &mut GGLWESwitchingKey<D>| key.fill_uniform(source))
+    }
+}
+
+impl<D: DataMut> Reset for GGLWETensorKey<D>
+where
+    MatZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.keys
+            .iter_mut()
+            .for_each(|key: &mut GGLWESwitchingKey<D>| key.reset())
+    }
+}
+
+impl<D: DataRef> fmt::Display for GGLWETensorKey<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(f, "(GLWETensorKey)",)?;
+        for (i, key) in self.keys.iter().enumerate() {
+            write!(f, "{}: {}", i, key)?;
+        }
+        Ok(())
+    }
+}
+
+impl GGLWETensorKey<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
+        let mut keys: Vec<GGLWESwitchingKey<Vec<u8>>> = Vec::new();
+        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
+        (0..pairs).for_each(|_| {
+            keys.push(GGLWESwitchingKey::alloc(n, basek, k, rows, digits, 1, rank));
+        });
+        Self { keys: keys }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
+        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
+        pairs * GGLWESwitchingKey::<Vec<u8>>::bytes_of(n, basek, k, rows, digits, 1, rank)
+    }
+}
+
+impl<D: Data> Infos for GGLWETensorKey<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.keys[0].inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.keys[0].basek()
+    }
+
+    fn k(&self) -> usize {
+        self.keys[0].k()
+    }
+}
+
+impl<D: Data> GGLWETensorKey<D> {
+    pub fn rank(&self) -> usize {
+        self.keys[0].rank()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.keys[0].rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.keys[0].rank_out()
+    }
+
+    pub fn digits(&self) -> usize {
+        self.keys[0].digits()
+    }
+}
+
+impl<D: DataMut> GGLWETensorKey<D> {
+    // Returns a mutable reference to GLWESwitchingKey_{s}(s[i] * s[j])
+    pub fn at_mut(&mut self, mut i: usize, mut j: usize) -> &mut GGLWESwitchingKey<D> {
+        if i > j {
+            std::mem::swap(&mut i, &mut j);
+        };
+        let rank: usize = self.rank();
+        &mut self.keys[i * rank + j - (i * (i + 1) / 2)]
+    }
+}
+
+impl<D: DataRef> GGLWETensorKey<D> {
+    // Returns a reference to GLWESwitchingKey_{s}(s[i] * s[j])
+    pub fn at(&self, mut i: usize, mut j: usize) -> &GGLWESwitchingKey<D> {
+        if i > j {
+            std::mem::swap(&mut i, &mut j);
+        };
+        let rank: usize = self.rank();
+        &self.keys[i * rank + j - (i * (i + 1) / 2)]
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GGLWETensorKey<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        let len: usize = reader.read_u64::<LittleEndian>()? as usize;
+        if self.keys.len() != len {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                format!("self.keys.len()={} != read len={}", self.keys.len(), len),
+            ));
+        }
+        for key in &mut self.keys {
+            key.read_from(reader)?;
+        }
+        Ok(())
+    }
+}
+
+impl<D: DataRef> WriterTo for GGLWETensorKey<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
+        for key in &self.keys {
+            key.write_to(writer)?;
+        }
+        Ok(())
+    }
+}

core/src/layouts/ggsw_ct.rs

@@ -1,12 +1,10 @@
 use backend::hal::{
-    api::{FillUniform, Reset, VmpPMatAlloc, VmpPMatAllocBytes, VmpPMatPrepare},
-    layouts::{Backend, Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
+    api::{FillUniform, Reset},
+    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
 };
 use std::fmt;
 
-use crate::{GLWECiphertext, Infos};
-
-pub trait GGSWLayoutFamily<B: Backend> = VmpPMatAlloc<B> + VmpPMatAllocBytes + VmpPMatPrepare<B>;
+use crate::layouts::{GLWECiphertext, Infos};
 
 #[derive(PartialEq, Eq, Clone)]
 pub struct GGSWCiphertext<D: Data> {

core/src/layouts/glwe_ct.rs

@@ -0,0 +1,151 @@
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Data, DataMut, DataRef, ReaderFrom, VecZnx, VecZnxToMut, VecZnxToRef, WriterTo},
+};
+use sampling::source::Source;
+
+use crate::layouts::{Infos, SetMetaData};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+use std::fmt;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GLWECiphertext<D: Data> {
+    pub data: VecZnx<D>,
+    pub basek: usize,
+    pub k: usize,
+}
+
+impl<D: DataRef> fmt::Debug for GLWECiphertext<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataRef> fmt::Display for GLWECiphertext<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "GLWECiphertext: basek={} k={}: {}",
+            self.basek(),
+            self.k(),
+            self.data
+        )
+    }
+}
+
+impl<D: DataMut> Reset for GLWECiphertext<D>
+where
+    VecZnx<D>: Reset,
+{
+    fn reset(&mut self) {
+        self.data.reset();
+        self.basek = 0;
+        self.k = 0;
+    }
+}
+
+impl<D: DataMut> FillUniform for GLWECiphertext<D> {
+    fn fill_uniform(&mut self, source: &mut Source) {
+        self.data.fill_uniform(source);
+    }
+}
+
+impl GLWECiphertext<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rank: usize) -> Self {
+        Self {
+            data: VecZnx::alloc(n, rank + 1, k.div_ceil(basek)),
+            basek,
+            k,
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rank: usize) -> usize {
+        VecZnx::alloc_bytes(n, rank + 1, k.div_ceil(basek))
+    }
+}
+
+impl<D: Data> Infos for GLWECiphertext<D> {
+    type Inner = VecZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.data
+    }
+
+    fn basek(&self) -> usize {
+        self.basek
+    }
+
+    fn k(&self) -> usize {
+        self.k
+    }
+}
+
+impl<D: Data> GLWECiphertext<D> {
+    pub fn rank(&self) -> usize {
+        self.cols() - 1
+    }
+}
+
+impl<D: DataRef> GLWECiphertext<D> {
+    pub fn clone(&self) -> GLWECiphertext<Vec<u8>> {
+        GLWECiphertext {
+            data: self.data.clone(),
+            basek: self.basek(),
+            k: self.k(),
+        }
+    }
+}
+
+impl<D: DataMut> SetMetaData for GLWECiphertext<D> {
+    fn set_k(&mut self, k: usize) {
+        self.k = k
+    }
+
+    fn set_basek(&mut self, basek: usize) {
+        self.basek = basek
+    }
+}
+
+pub trait GLWECiphertextToRef: Infos {
+    fn to_ref(&self) -> GLWECiphertext<&[u8]>;
+}
+
+impl<D: DataRef> GLWECiphertextToRef for GLWECiphertext<D> {
+    fn to_ref(&self) -> GLWECiphertext<&[u8]> {
+        GLWECiphertext {
+            data: self.data.to_ref(),
+            basek: self.basek,
+            k: self.k,
+        }
+    }
+}
+
+pub trait GLWECiphertextToMut: Infos {
+    fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]>;
+}
+
+impl<D: DataMut> GLWECiphertextToMut for GLWECiphertext<D> {
+    fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]> {
+        GLWECiphertext {
+            data: self.data.to_mut(),
+            basek: self.basek,
+            k: self.k,
+        }
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GLWECiphertext<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.k = reader.read_u64::<LittleEndian>()? as usize;
+        self.basek = reader.read_u64::<LittleEndian>()? as usize;
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GLWECiphertext<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.k as u64)?;
+        writer.write_u64::<LittleEndian>(self.basek as u64)?;
+        self.data.write_to(writer)
+    }
+}

core/src/layouts/glwe_pk.rs

@@ -0,0 +1,73 @@
+use backend::hal::layouts::{Data, DataMut, DataRef, ReaderFrom, VecZnx, WriterTo};
+
+use crate::{dist::Distribution, layouts::Infos};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+#[derive(PartialEq, Eq)]
+pub struct GLWEPublicKey<D: Data> {
+    pub(crate) data: VecZnx<D>,
+    pub(crate) basek: usize,
+    pub(crate) k: usize,
+    pub(crate) dist: Distribution,
+}
+
+impl GLWEPublicKey<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rank: usize) -> Self {
+        Self {
+            data: VecZnx::alloc(n, rank + 1, k.div_ceil(basek)),
+            basek: basek,
+            k: k,
+            dist: Distribution::NONE,
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rank: usize) -> usize {
+        VecZnx::alloc_bytes(n, rank + 1, k.div_ceil(basek))
+    }
+}
+
+impl<D: Data> Infos for GLWEPublicKey<D> {
+    type Inner = VecZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.data
+    }
+
+    fn basek(&self) -> usize {
+        self.basek
+    }
+
+    fn k(&self) -> usize {
+        self.k
+    }
+}
+
+impl<D: Data> GLWEPublicKey<D> {
+    pub fn rank(&self) -> usize {
+        self.cols() - 1
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GLWEPublicKey<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.k = reader.read_u64::<LittleEndian>()? as usize;
+        self.basek = reader.read_u64::<LittleEndian>()? as usize;
+        match Distribution::read_from(reader) {
+            Ok(dist) => self.dist = dist,
+            Err(e) => return Err(e),
+        }
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GLWEPublicKey<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.k as u64)?;
+        writer.write_u64::<LittleEndian>(self.basek as u64)?;
+        match self.dist.write_to(writer) {
+            Ok(()) => {}
+            Err(e) => return Err(e),
+        }
+        self.data.write_to(writer)
+    }
+}

core/src/layouts/glwe_pt.rs

@@ -1,6 +1,6 @@
 use backend::hal::layouts::{Data, DataMut, DataRef, VecZnx, VecZnxToMut, VecZnxToRef};
 
-use crate::{GLWECiphertext, GLWECiphertextToMut, GLWECiphertextToRef, GLWEOps, Infos, SetMetaData};
+use crate::layouts::{GLWECiphertext, GLWECiphertextToMut, GLWECiphertextToRef, Infos, SetMetaData};
 
 pub struct GLWEPlaintext<D: Data> {
     pub data: VecZnx<D>,
@@ -67,10 +67,3 @@ impl<D: DataMut> GLWECiphertextToMut for GLWEPlaintext<D> {
         }
     }
 }
-
-impl<D> GLWEOps for GLWEPlaintext<D>
-where
-    D: DataMut,
-    GLWEPlaintext<D>: GLWECiphertextToMut + Infos + SetMetaData,
-{
-}

core/src/layouts/glwe_sk.rs

@@ -1,13 +1,11 @@
 use backend::hal::{
-    api::{SvpPPolAlloc, SvpPPolAllocBytes, SvpPrepare, ZnxInfos, ZnxZero},
-    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, ScalarZnx, SvpPPol, WriterTo},
+    api::{ZnxInfos, ZnxZero},
+    layouts::{Data, DataMut, DataRef, ReaderFrom, ScalarZnx, WriterTo},
 };
 use sampling::source::Source;
 
 use crate::dist::Distribution;
 
-pub trait GLWESecretFamily<B: Backend> = SvpPrepare<B> + SvpPPolAllocBytes + SvpPPolAlloc<B>;
-
 #[derive(PartialEq, Eq, Clone)]
 pub struct GLWESecret<D: Data> {
     pub(crate) data: ScalarZnx<D>,
@@ -102,66 +100,3 @@ impl<D: DataRef> WriterTo for GLWESecret<D> {
         self.data.write_to(writer)
     }
 }
-
-pub struct GLWESecretExec<D: Data, B: Backend> {
-    pub(crate) data: SvpPPol<D, B>,
-    pub(crate) dist: Distribution,
-}
-
-impl<B: Backend> GLWESecretExec<Vec<u8>, B> {
-    pub fn alloc(module: &Module<B>, n: usize, rank: usize) -> Self
-    where
-        Module<B>: SvpPPolAlloc<B>,
-    {
-        Self {
-            data: module.svp_ppol_alloc(n, rank),
-            dist: Distribution::NONE,
-        }
-    }
-
-    pub fn bytes_of(module: &Module<B>, n: usize, rank: usize) -> usize
-    where
-        Module<B>: SvpPPolAllocBytes,
-    {
-        module.svp_ppol_alloc_bytes(n, rank)
-    }
-}
-
-impl<B: Backend> GLWESecretExec<Vec<u8>, B> {
-    pub fn from<D>(module: &Module<B>, sk: &GLWESecret<D>) -> Self
-    where
-        D: DataRef,
-        Module<B>: SvpPrepare<B> + SvpPPolAlloc<B>,
-    {
-        let mut sk_dft: GLWESecretExec<Vec<u8>, B> = Self::alloc(module, sk.n(), sk.rank());
-        sk_dft.prepare(module, sk);
-        sk_dft
-    }
-}
-
-impl<D: Data, B: Backend> GLWESecretExec<D, B> {
-    pub fn n(&self) -> usize {
-        self.data.n()
-    }
-
-    pub fn log_n(&self) -> usize {
-        self.data.log_n()
-    }
-
-    pub fn rank(&self) -> usize {
-        self.data.cols()
-    }
-}
-
-impl<D: DataMut, B: Backend> GLWESecretExec<D, B> {
-    pub(crate) fn prepare<O>(&mut self, module: &Module<B>, sk: &GLWESecret<O>)
-    where
-        O: DataRef,
-        Module<B>: SvpPrepare<B>,
-    {
-        (0..self.rank()).for_each(|i| {
-            module.svp_prepare(&mut self.data, i, &sk.data, i);
-        });
-        self.dist = sk.dist
-    }
-}

core/src/layouts/glwe_to_lwe_ksk.rs

@@ -0,0 +1,88 @@
+use backend::hal::{
+    api::{FillUniform, Reset},
+    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
+};
+
+use crate::layouts::{GGLWESwitchingKey, Infos};
+
+use std::fmt;
+
+/// A special [GLWESwitchingKey] required to for the conversion from [GLWECiphertext] to [LWECiphertext].
+#[derive(PartialEq, Eq, Clone)]
+pub struct GLWEToLWESwitchingKey<D: Data>(pub(crate) GGLWESwitchingKey<D>);
+
+impl<D: DataRef> fmt::Debug for GLWEToLWESwitchingKey<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataMut> FillUniform for GLWEToLWESwitchingKey<D> {
+    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
+        self.0.fill_uniform(source);
+    }
+}
+
+impl<D: DataMut> Reset for GLWEToLWESwitchingKey<D> {
+    fn reset(&mut self) {
+        self.0.reset();
+    }
+}
+
+impl<D: DataRef> fmt::Display for GLWEToLWESwitchingKey<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "(GLWEToLWESwitchingKey) {}", self.0)
+    }
+}
+
+impl<D: Data> Infos for GLWEToLWESwitchingKey<D> {
+    type Inner = MatZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.0.inner()
+    }
+
+    fn basek(&self) -> usize {
+        self.0.basek()
+    }
+
+    fn k(&self) -> usize {
+        self.0.k()
+    }
+}
+
+impl<D: Data> GLWEToLWESwitchingKey<D> {
+    pub fn digits(&self) -> usize {
+        self.0.digits()
+    }
+
+    pub fn rank(&self) -> usize {
+        self.0.rank()
+    }
+
+    pub fn rank_in(&self) -> usize {
+        self.0.rank_in()
+    }
+
+    pub fn rank_out(&self) -> usize {
+        self.0.rank_out()
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GLWEToLWESwitchingKey<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.0.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GLWEToLWESwitchingKey<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        self.0.write_to(writer)
+    }
+}
+
+impl GLWEToLWESwitchingKey<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, rank_in: usize) -> Self {
+        Self(GGLWESwitchingKey::alloc(n, basek, k, rows, 1, rank_in, 1))
+    }
+}

core/src/layouts/infos.rs

@@ -1,7 +1,4 @@
-use backend::hal::{
-    api::{VecZnxCopy, VecZnxFillUniform, ZnxInfos},
-    layouts::{Backend, Module},
-};
+use backend::hal::api::ZnxInfos;
 
 pub trait Infos {
     type Inner: ZnxInfos;
@@ -55,9 +52,3 @@ pub trait SetMetaData {
     fn set_basek(&mut self, basek: usize);
     fn set_k(&mut self, k: usize);
 }
-
-pub trait Decompress<B: Backend, C> {
-    fn decompress(&mut self, module: &Module<B>, other: &C)
-    where
-        Module<B>: VecZnxFillUniform + VecZnxCopy;
-}