Add schemes (#71)

* Move br + cbt to schemes/tfhe

* refactor blind rotation

* refactor circuit bootstrapping

* renamed exec -> prepared

Cargo.lock

@@ -563,6 +563,17 @@ dependencies = [
  "rand_distr",
 ]
 
+[[package]]
+name = "schemes"
+version = "0.1.0"
+dependencies = [
+ "backend",
+ "byteorder",
+ "core",
+ "itertools 0.14.0",
+ "sampling",
+]
+
 [[package]]
 name = "serde"
 version = "1.0.219"

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["backend", "core", "sampling", "utils"]
+members = ["backend", "core", "sampling", "utils", "schemes"]
 resolver = "3"
 
 [workspace.dependencies]

README.md

@@ -115,12 +115,12 @@ In addition to providing a general purpose FHE library over a unified plaintext
 	    pub(crate) dist: Distribution,
 	}
 
-	pub struct GLWESecretExec<D: Data, B: Backend> {
+	pub struct GLWESecrecPrepared<D: Data, B: Backend> {
 	    pub(crate) data: SvpPPol<D, B>,
 	    pub(crate) dist: Distribution,
 	}
  
-	impl<D: DataMut, B: Backend> GLWESecretExec<D, B> {
+	impl<D: DataMut, B: Backend> GLWESecretPrepared<D, B> {
 	    pub fn prepare<O>(&mut self, module: &Module<B>, sk: &GLWESecret<O>)
 	    where
 	        O: DataRef,

backend/examples/rlwe_encrypt.rs

@@ -3,8 +3,7 @@ use backend::{
         api::{
             ModuleNew, ScratchOwnedAlloc, ScratchOwnedBorrow, SvpApplyInplace, SvpPPolAlloc, SvpPrepare, VecZnxAddNormal,
             VecZnxBigAddSmallInplace, VecZnxBigAlloc, VecZnxBigNormalize, VecZnxBigNormalizeTmpBytes, VecZnxBigSubSmallBInplace,
-            VecZnxDecodeVeci64, VecZnxDftAlloc, VecZnxDftFromVecZnx, VecZnxDftToVecZnxBigTmpA, VecZnxEncodeVeci64,
+            VecZnxDftAlloc, VecZnxDftFromVecZnx, VecZnxDftToVecZnxBigTmpA, VecZnxFillUniform, VecZnxNormalizeInplace, ZnxInfos,
-            VecZnxFillUniform, VecZnxNormalizeInplace, ZnxInfos,
         },
         layouts::{Module, ScalarZnx, ScratchOwned, SvpPPol, VecZnx, VecZnxBig, VecZnxDft},
     },
@@ -73,7 +72,7 @@ fn main() {
     let mut want: Vec<i64> = vec![0; n];
     want.iter_mut()
         .for_each(|x| *x = source.next_u64n(16, 15) as i64);
-    module.encode_vec_i64(basek, &mut m, 0, log_scale, &want, 4);
+    m.encode_vec_i64(basek, 0, log_scale, &want, 4);
     module.vec_znx_normalize_inplace(basek, &mut m, 0, scratch.borrow());
 
     // m - BIG(ct[1] * s)
@@ -132,8 +131,7 @@ fn main() {
 
     // have = m * 2^{log_scale} + e
     let mut have: Vec<i64> = vec![i64::default(); n];
-    module.decode_vec_i64(basek, &mut res, 0, ct_size * basek, &mut have);
+    res.decode_vec_i64(basek, 0, ct_size * basek, &mut have);
-
     let scale: f64 = (1 << (res.size() * basek - log_scale)) as f64;
     izip!(want.iter(), have.iter())
         .enumerate()

backend/src/hal/api/vec_znx.rs

@@ -1,5 +1,4 @@
 use rand_distr::Distribution;
-use rug::Float;
 use sampling::source::Source;
 
 use crate::hal::layouts::{Backend, ScalarZnxToRef, Scratch, VecZnxToMut, VecZnxToRef};
@@ -198,13 +197,6 @@ pub trait VecZnxCopy {
         A: VecZnxToRef;
 }
 
-pub trait VecZnxStd {
-    /// Returns the standard devaition of the i-th polynomial.
-    fn vec_znx_std<A>(&self, basek: usize, a: &A, a_col: usize) -> f64
-    where
-        A: VecZnxToRef;
-}
-
 pub trait VecZnxFillUniform {
     /// Fills the first `size` size with uniform values in \[-2^{basek-1}, 2^{basek-1}\]
     fn vec_znx_fill_uniform<R>(&self, basek: usize, res: &mut R, res_col: usize, k: usize, source: &mut Source)
@@ -269,75 +261,3 @@ pub trait VecZnxAddNormal {
     ) where
         R: VecZnxToMut;
 }
-
-pub trait VecZnxEncodeVeci64 {
-    /// encode a vector of i64 on the receiver.
-    ///
-    /// # Arguments
-    ///
-    /// * `col_i`: the index of the poly where to encode the data.
-    /// * `basek`: base two negative logarithm decomposition of the receiver.
-    /// * `k`: base two negative logarithm of the scaling of the data.
-    /// * `data`: data to encode on the receiver.
-    /// * `log_max`: base two logarithm of the infinity norm of the input data.
-    fn encode_vec_i64<R>(&self, basek: usize, res: &mut R, res_col: usize, k: usize, data: &[i64], log_max: usize)
-    where
-        R: VecZnxToMut;
-}
-
-pub trait VecZnxEncodeCoeffsi64 {
-    /// encodes a single i64 on the receiver at the given index.
-    ///
-    /// # Arguments
-    ///
-    /// * `res_col`: the index of the poly where to encode the data.
-    /// * `basek`: base two negative logarithm decomposition of the receiver.
-    /// * `k`: base two negative logarithm of the scaling of the data.
-    /// * `i`: index of the coefficient on which to encode the data.
-    /// * `data`: data to encode on the receiver.
-    /// * `log_max`: base two logarithm of the infinity norm of the input data.
-    fn encode_coeff_i64<R>(&self, basek: usize, res: &mut R, res_col: usize, k: usize, i: usize, data: i64, log_max: usize)
-    where
-        R: VecZnxToMut;
-}
-
-pub trait VecZnxDecodeVeci64 {
-    /// decode a vector of i64 from the receiver.
-    ///
-    /// # Arguments
-    ///
-    /// * `res_col`: the index of the poly where to encode the data.
-    /// * `basek`: base two negative logarithm decomposition of the receiver.
-    /// * `k`: base two logarithm of the scaling of the data.
-    /// * `data`: data to decode from the receiver.
-    fn decode_vec_i64<R>(&self, basek: usize, res: &R, res_col: usize, k: usize, data: &mut [i64])
-    where
-        R: VecZnxToRef;
-}
-
-pub trait VecZnxDecodeCoeffsi64 {
-    /// decode a single of i64 from the receiver at the given index.
-    ///
-    /// # Arguments
-    ///
-    /// * `res_col`: the index of the poly where to encode the data.
-    /// * `basek`: base two negative logarithm decomposition of the receiver.
-    /// * `k`: base two negative logarithm of the scaling of the data.
-    /// * `i`: index of the coefficient to decode.
-    /// * `data`: data to decode from the receiver.
-    fn decode_coeff_i64<R>(&self, basek: usize, res: &R, res_col: usize, k: usize, i: usize) -> i64
-    where
-        R: VecZnxToRef;
-}
-
-pub trait VecZnxDecodeVecFloat {
-    /// decode a vector of Float from the receiver.
-    ///
-    /// # Arguments
-    /// * `col_i`: the index of the poly where to encode the data.
-    /// * `basek`: base two negative logarithm decomposition of the receiver.
-    /// * `data`: data to decode from the receiver.
-    fn decode_vec_float<R>(&self, basek: usize, res: &R, col_i: usize, data: &mut [Float])
-    where
-        R: VecZnxToRef;
-}

backend/src/hal/delegates/vec_znx.rs

@@ -3,22 +3,19 @@ use sampling::source::Source;
 use crate::hal::{
     api::{
         VecZnxAdd, VecZnxAddDistF64, VecZnxAddInplace, VecZnxAddNormal, VecZnxAddScalarInplace, VecZnxAutomorphism,
-        VecZnxAutomorphismInplace, VecZnxCopy, VecZnxDecodeCoeffsi64, VecZnxDecodeVecFloat, VecZnxDecodeVeci64,
+        VecZnxAutomorphismInplace, VecZnxCopy, VecZnxFillDistF64, VecZnxFillNormal, VecZnxFillUniform, VecZnxLshInplace,
-        VecZnxEncodeCoeffsi64, VecZnxEncodeVeci64, VecZnxFillDistF64, VecZnxFillNormal, VecZnxFillUniform, VecZnxLshInplace,
         VecZnxMerge, VecZnxMulXpMinusOne, VecZnxMulXpMinusOneInplace, VecZnxNegate, VecZnxNegateInplace, VecZnxNormalize,
         VecZnxNormalizeInplace, VecZnxNormalizeTmpBytes, VecZnxRotate, VecZnxRotateInplace, VecZnxRshInplace, VecZnxSplit,
-        VecZnxStd, VecZnxSub, VecZnxSubABInplace, VecZnxSubBAInplace, VecZnxSubScalarInplace, VecZnxSwithcDegree,
+        VecZnxSub, VecZnxSubABInplace, VecZnxSubBAInplace, VecZnxSubScalarInplace, VecZnxSwithcDegree,
     },
     layouts::{Backend, Module, ScalarZnxToRef, Scratch, VecZnxToMut, VecZnxToRef},
     oep::{
         VecZnxAddDistF64Impl, VecZnxAddImpl, VecZnxAddInplaceImpl, VecZnxAddNormalImpl, VecZnxAddScalarInplaceImpl,
-        VecZnxAutomorphismImpl, VecZnxAutomorphismInplaceImpl, VecZnxCopyImpl, VecZnxDecodeCoeffsi64Impl,
+        VecZnxAutomorphismImpl, VecZnxAutomorphismInplaceImpl, VecZnxCopyImpl, VecZnxFillDistF64Impl, VecZnxFillNormalImpl,
-        VecZnxDecodeVecFloatImpl, VecZnxDecodeVeci64Impl, VecZnxEncodeCoeffsi64Impl, VecZnxEncodeVeci64Impl,
+        VecZnxFillUniformImpl, VecZnxLshInplaceImpl, VecZnxMergeImpl, VecZnxMulXpMinusOneImpl, VecZnxMulXpMinusOneInplaceImpl,
-        VecZnxFillDistF64Impl, VecZnxFillNormalImpl, VecZnxFillUniformImpl, VecZnxLshInplaceImpl, VecZnxMergeImpl,
+        VecZnxNegateImpl, VecZnxNegateInplaceImpl, VecZnxNormalizeImpl, VecZnxNormalizeInplaceImpl, VecZnxNormalizeTmpBytesImpl,
-        VecZnxMulXpMinusOneImpl, VecZnxMulXpMinusOneInplaceImpl, VecZnxNegateImpl, VecZnxNegateInplaceImpl, VecZnxNormalizeImpl,
+        VecZnxRotateImpl, VecZnxRotateInplaceImpl, VecZnxRshInplaceImpl, VecZnxSplitImpl, VecZnxSubABInplaceImpl,
-        VecZnxNormalizeInplaceImpl, VecZnxNormalizeTmpBytesImpl, VecZnxRotateImpl, VecZnxRotateInplaceImpl, VecZnxRshInplaceImpl,
+        VecZnxSubBAInplaceImpl, VecZnxSubImpl, VecZnxSubScalarInplaceImpl, VecZnxSwithcDegreeImpl,
-        VecZnxSplitImpl, VecZnxStdImpl, VecZnxSubABInplaceImpl, VecZnxSubBAInplaceImpl, VecZnxSubImpl,
-        VecZnxSubScalarInplaceImpl, VecZnxSwithcDegreeImpl,
     },
 };
 
@@ -325,18 +322,6 @@ where
     }
 }
 
-impl<B> VecZnxStd for Module<B>
-where
-    B: Backend + VecZnxStdImpl<B>,
-{
-    fn vec_znx_std<A>(&self, basek: usize, a: &A, a_col: usize) -> f64
-    where
-        A: VecZnxToRef,
-    {
-        B::vec_znx_std_impl(self, basek, a, a_col)
-    }
-}
-
 impl<B> VecZnxFillUniform for Module<B>
 where
     B: Backend + VecZnxFillUniformImpl<B>,
@@ -428,63 +413,3 @@ where
         B::vec_znx_add_normal_impl(self, basek, res, res_col, k, source, sigma, bound);
     }
 }
-
-impl<B> VecZnxEncodeVeci64 for Module<B>
-where
-    B: Backend + VecZnxEncodeVeci64Impl<B>,
-{
-    fn encode_vec_i64<R>(&self, basek: usize, res: &mut R, res_col: usize, k: usize, data: &[i64], log_max: usize)
-    where
-        R: VecZnxToMut,
-    {
-        B::encode_vec_i64_impl(self, basek, res, res_col, k, data, log_max);
-    }
-}
-
-impl<B> VecZnxEncodeCoeffsi64 for Module<B>
-where
-    B: Backend + VecZnxEncodeCoeffsi64Impl<B>,
-{
-    fn encode_coeff_i64<R>(&self, basek: usize, res: &mut R, res_col: usize, k: usize, i: usize, data: i64, log_max: usize)
-    where
-        R: VecZnxToMut,
-    {
-        B::encode_coeff_i64_impl(self, basek, res, res_col, k, i, data, log_max);
-    }
-}
-
-impl<B> VecZnxDecodeVeci64 for Module<B>
-where
-    B: Backend + VecZnxDecodeVeci64Impl<B>,
-{
-    fn decode_vec_i64<R>(&self, basek: usize, res: &R, res_col: usize, k: usize, data: &mut [i64])
-    where
-        R: VecZnxToRef,
-    {
-        B::decode_vec_i64_impl(self, basek, res, res_col, k, data);
-    }
-}
-
-impl<B> VecZnxDecodeCoeffsi64 for Module<B>
-where
-    B: Backend + VecZnxDecodeCoeffsi64Impl<B>,
-{
-    fn decode_coeff_i64<R>(&self, basek: usize, res: &R, res_col: usize, k: usize, i: usize) -> i64
-    where
-        R: VecZnxToRef,
-    {
-        B::decode_coeff_i64_impl(self, basek, res, res_col, k, i)
-    }
-}
-
-impl<B> VecZnxDecodeVecFloat for Module<B>
-where
-    B: Backend + VecZnxDecodeVecFloatImpl<B>,
-{
-    fn decode_vec_float<R>(&self, basek: usize, res: &R, col_i: usize, data: &mut [rug::Float])
-    where
-        R: VecZnxToRef,
-    {
-        B::decode_vec_float_impl(self, basek, res, col_i, data);
-    }
-}

backend/src/hal/layouts/encoding.rs

@@ -0,0 +1,204 @@
+use itertools::izip;
+use rug::{Assign, Float};
+
+use crate::hal::{
+    api::{ZnxInfos, ZnxView, ZnxViewMut, ZnxZero},
+    layouts::{DataMut, DataRef, VecZnx, VecZnxToMut, VecZnxToRef},
+};
+
+impl<D: DataMut> VecZnx<D> {
+    pub fn encode_vec_i64(&mut self, basek: usize, col: usize, k: usize, data: &[i64], log_max: usize) {
+        let size: usize = k.div_ceil(basek);
+
+        #[cfg(debug_assertions)]
+        {
+            let a: VecZnx<&mut [u8]> = self.to_mut();
+            assert!(
+                size <= a.size(),
+                "invalid argument k: k.div_ceil(basek)={} > a.size()={}",
+                size,
+                a.size()
+            );
+            assert!(col < a.cols());
+            assert!(data.len() <= a.n())
+        }
+
+        let data_len: usize = data.len();
+        let mut a: VecZnx<&mut [u8]> = self.to_mut();
+        let k_rem: usize = basek - (k % basek);
+
+        // Zeroes coefficients of the i-th column
+        (0..a.size()).for_each(|i| {
+            a.zero_at(col, i);
+        });
+
+        // If 2^{basek} * 2^{k_rem} < 2^{63}-1, then we can simply copy
+        // values on the last limb.
+        // Else we decompose values base2k.
+        if log_max + k_rem < 63 || k_rem == basek {
+            a.at_mut(col, size - 1)[..data_len].copy_from_slice(&data[..data_len]);
+        } else {
+            let mask: i64 = (1 << basek) - 1;
+            let steps: usize = size.min(log_max.div_ceil(basek));
+            (size - steps..size)
+                .rev()
+                .enumerate()
+                .for_each(|(i, i_rev)| {
+                    let shift: usize = i * basek;
+                    izip!(a.at_mut(col, i_rev).iter_mut(), data.iter()).for_each(|(y, x)| *y = (x >> shift) & mask);
+                })
+        }
+
+        // Case where self.prec % self.k != 0.
+        if k_rem != basek {
+            let steps: usize = size.min(log_max.div_ceil(basek));
+            (size - steps..size).rev().for_each(|i| {
+                a.at_mut(col, i)[..data_len]
+                    .iter_mut()
+                    .for_each(|x| *x <<= k_rem);
+            })
+        }
+    }
+
+    pub fn encode_coeff_i64(&mut self, basek: usize, col: usize, k: usize, idx: usize, data: i64, log_max: usize) {
+        let size: usize = k.div_ceil(basek);
+
+        #[cfg(debug_assertions)]
+        {
+            let a: VecZnx<&mut [u8]> = self.to_mut();
+            assert!(idx < a.n());
+            assert!(
+                size <= a.size(),
+                "invalid argument k: k.div_ceil(basek)={} > a.size()={}",
+                size,
+                a.size()
+            );
+            assert!(col < a.cols());
+        }
+
+        let k_rem: usize = basek - (k % basek);
+        let mut a: VecZnx<&mut [u8]> = self.to_mut();
+        (0..a.size()).for_each(|j| a.at_mut(col, j)[idx] = 0);
+
+        // If 2^{basek} * 2^{k_rem} < 2^{63}-1, then we can simply copy
+        // values on the last limb.
+        // Else we decompose values base2k.
+        if log_max + k_rem < 63 || k_rem == basek {
+            a.at_mut(col, size - 1)[idx] = data;
+        } else {
+            let mask: i64 = (1 << basek) - 1;
+            let steps: usize = size.min(log_max.div_ceil(basek));
+            (size - steps..size)
+                .rev()
+                .enumerate()
+                .for_each(|(j, j_rev)| {
+                    a.at_mut(col, j_rev)[idx] = (data >> (j * basek)) & mask;
+                })
+        }
+
+        // Case where prec % k != 0.
+        if k_rem != basek {
+            let steps: usize = size.min(log_max.div_ceil(basek));
+            (size - steps..size).rev().for_each(|j| {
+                a.at_mut(col, j)[idx] <<= k_rem;
+            })
+        }
+    }
+}
+
+impl<D: DataRef> VecZnx<D> {
+    pub fn decode_vec_i64(&self, basek: usize, col: usize, k: usize, data: &mut [i64]) {
+        let size: usize = k.div_ceil(basek);
+        #[cfg(debug_assertions)]
+        {
+            let a: VecZnx<&[u8]> = self.to_ref();
+            assert!(
+                data.len() >= a.n(),
+                "invalid data: data.len()={} < a.n()={}",
+                data.len(),
+                a.n()
+            );
+            assert!(col < a.cols());
+        }
+
+        let a: VecZnx<&[u8]> = self.to_ref();
+        data.copy_from_slice(a.at(col, 0));
+        let rem: usize = basek - (k % basek);
+        if k < basek {
+            data.iter_mut().for_each(|x| *x >>= rem);
+        } else {
+            (1..size).for_each(|i| {
+                if i == size - 1 && rem != basek {
+                    let k_rem: usize = basek - rem;
+                    izip!(a.at(col, i).iter(), data.iter_mut()).for_each(|(x, y)| {
+                        *y = (*y << k_rem) + (x >> rem);
+                    });
+                } else {
+                    izip!(a.at(col, i).iter(), data.iter_mut()).for_each(|(x, y)| {
+                        *y = (*y << basek) + x;
+                    });
+                }
+            })
+        }
+    }
+
+    pub fn decode_coeff_i64(&self, basek: usize, col: usize, k: usize, idx: usize) -> i64 {
+        #[cfg(debug_assertions)]
+        {
+            let a: VecZnx<&[u8]> = self.to_ref();
+            assert!(idx < a.n());
+            assert!(col < a.cols())
+        }
+
+        let a: VecZnx<&[u8]> = self.to_ref();
+        let size: usize = k.div_ceil(basek);
+        let mut res: i64 = 0;
+        let rem: usize = basek - (k % basek);
+        (0..size).for_each(|j| {
+            let x: i64 = a.at(col, j)[idx];
+            if j == size - 1 && rem != basek {
+                let k_rem: usize = basek - rem;
+                res = (res << k_rem) + (x >> rem);
+            } else {
+                res = (res << basek) + x;
+            }
+        });
+        res
+    }
+
+    pub fn decode_vec_float(&self, basek: usize, col: usize, data: &mut [Float]) {
+        #[cfg(debug_assertions)]
+        {
+            let a: VecZnx<&[u8]> = self.to_ref();
+            assert!(
+                data.len() >= a.n(),
+                "invalid data: data.len()={} < a.n()={}",
+                data.len(),
+                a.n()
+            );
+            assert!(col < a.cols());
+        }
+
+        let a: VecZnx<&[u8]> = self.to_ref();
+        let size: usize = a.size();
+        let prec: u32 = (basek * size) as u32;
+
+        // 2^{basek}
+        let base = Float::with_val(prec, (1 << basek) as f64);
+
+        // y[i] = sum x[j][i] * 2^{-basek*j}
+        (0..size).for_each(|i| {
+            if i == 0 {
+                izip!(a.at(col, size - i - 1).iter(), data.iter_mut()).for_each(|(x, y)| {
+                    y.assign(*x);
+                    *y /= &base;
+                });
+            } else {
+                izip!(a.at(col, size - i - 1).iter(), data.iter_mut()).for_each(|(x, y)| {
+                    *y += Float::with_val(prec, *x);
+                    *y /= &base;
+                });
+            }
+        });
+    }
+}

backend/src/hal/layouts/mod.rs

@@ -1,8 +1,10 @@
+mod encoding;
 mod mat_znx;
 mod module;
 mod scalar_znx;
 mod scratch;
 mod serialization;
+mod stats;
 mod svp_ppol;
 mod vec_znx;
 mod vec_znx_big;

backend/src/hal/layouts/stats.rs

@@ -0,0 +1,32 @@
+use rug::{
+    Float,
+    float::Round,
+    ops::{AddAssignRound, DivAssignRound, SubAssignRound},
+};
+
+use crate::hal::{
+    api::ZnxInfos,
+    layouts::{DataRef, VecZnx},
+};
+
+impl<D: DataRef> VecZnx<D> {
+    pub fn std(&self, basek: usize, col: usize) -> f64 {
+        let prec: u32 = (self.size() * basek) as u32;
+        let mut data: Vec<Float> = (0..self.n()).map(|_| Float::with_val(prec, 0)).collect();
+        self.decode_vec_float(basek, col, &mut data);
+        // std = sqrt(sum((xi - avg)^2) / n)
+        let mut avg: Float = Float::with_val(prec, 0);
+        data.iter().for_each(|x| {
+            avg.add_assign_round(x, Round::Nearest);
+        });
+        avg.div_assign_round(Float::with_val(prec, data.len()), Round::Nearest);
+        data.iter_mut().for_each(|x| {
+            x.sub_assign_round(&avg, Round::Nearest);
+        });
+        let mut std: Float = Float::with_val(prec, 0);
+        data.iter().for_each(|x| std += x * x);
+        std.div_assign_round(Float::with_val(prec, data.len()), Round::Nearest);
+        std = std.sqrt();
+        std.to_f64()
+    }
+}

backend/src/hal/oep/vec_znx.rs

@@ -1,5 +1,4 @@
 use rand_distr::Distribution;
-use rug::Float;
 use sampling::source::Source;
 
 use crate::hal::layouts::{Backend, Module, ScalarZnxToRef, Scratch, VecZnxToMut, VecZnxToRef};
@@ -288,15 +287,6 @@ pub unsafe trait VecZnxCopyImpl<B: Backend> {
         A: VecZnxToRef;
 }
 
-/// # THIS TRAIT IS AN OPEN EXTENSION POINT (unsafe)
-/// * See [crate::hal::api::VecZnxStd] for corresponding public API.
-/// * See [crate::doc::backend_safety] for safety contract.
-pub unsafe trait VecZnxStdImpl<B: Backend> {
-    fn vec_znx_std_impl<A>(module: &Module<B>, basek: usize, a: &A, a_col: usize) -> f64
-    where
-        A: VecZnxToRef;
-}
-
 /// # THIS TRAIT IS AN OPEN EXTENSION POINT (unsafe)
 /// * See [crate::hal::api::VecZnxFillUniform] for corresponding public API.
 /// * See [crate::doc::backend_safety] for safety contract.
@@ -373,68 +363,3 @@ pub unsafe trait VecZnxAddNormalImpl<B: Backend> {
     ) where
         R: VecZnxToMut;
 }
-
-/// # THIS TRAIT IS AN OPEN EXTENSION POINT (unsafe)
-/// * See \[TODO\] for reference code.
-/// * See [crate::hal::api::VecZnxEncodeVeci64] for corresponding public API.
-/// * See [crate::doc::backend_safety] for safety contract.
-pub unsafe trait VecZnxEncodeVeci64Impl<B: Backend> {
-    fn encode_vec_i64_impl<R>(
-        module: &Module<B>,
-        basek: usize,
-        res: &mut R,
-        res_col: usize,
-        k: usize,
-        data: &[i64],
-        log_max: usize,
-    ) where
-        R: VecZnxToMut;
-}
-
-/// # THIS TRAIT IS AN OPEN EXTENSION POINT (unsafe)
-/// * See \[TODO\] for reference code.
-/// * See [crate::hal::api::VecZnxEncodeCoeffsi64] for corresponding public API.
-/// * See [crate::doc::backend_safety] for safety contract.
-pub unsafe trait VecZnxEncodeCoeffsi64Impl<B: Backend> {
-    fn encode_coeff_i64_impl<R>(
-        module: &Module<B>,
-        basek: usize,
-        res: &mut R,
-        res_col: usize,
-        k: usize,
-        i: usize,
-        data: i64,
-        log_max: usize,
-    ) where
-        R: VecZnxToMut;
-}
-
-/// # THIS TRAIT IS AN OPEN EXTENSION POINT (unsafe)
-/// * See \[TODO\] for reference code.
-/// * See [crate::hal::api::VecZnxDecodeVeci64] for corresponding public API.
-/// * See [crate::doc::backend_safety] for safety contract.
-pub unsafe trait VecZnxDecodeVeci64Impl<B: Backend> {
-    fn decode_vec_i64_impl<R>(module: &Module<B>, basek: usize, res: &R, res_col: usize, k: usize, data: &mut [i64])
-    where
-        R: VecZnxToRef;
-}
-
-/// # THIS TRAIT IS AN OPEN EXTENSION POINT (unsafe)
-/// * See \[TODO\] for reference code.
-/// * See [crate::hal::api::VecZnxDecodeCoeffsi64] for corresponding public API.
-/// * See [crate::doc::backend_safety] for safety contract.
-pub unsafe trait VecZnxDecodeCoeffsi64Impl<B: Backend> {
-    fn decode_coeff_i64_impl<R>(module: &Module<B>, basek: usize, res: &R, res_col: usize, k: usize, i: usize) -> i64
-    where
-        R: VecZnxToRef;
-}
-
-/// # THIS TRAIT IS AN OPEN EXTENSION POINT (unsafe)
-/// * See \[TODO\] for reference code.
-/// * See [crate::hal::api::VecZnxDecodeVecFloat] for corresponding public API.
-/// * See [crate::doc::backend_safety] for safety contract.
-pub unsafe trait VecZnxDecodeVecFloatImpl<B: Backend> {
-    fn decode_vec_float_impl<R>(module: &Module<B>, basek: usize, res: &R, res_col: usize, data: &mut [Float])
-    where
-        R: VecZnxToRef;
-}

backend/src/hal/tests/vec_znx/encoding.rs

@@ -0,0 +1,52 @@
+use sampling::source::Source;
+
+use crate::hal::{
+    api::{ZnxInfos, ZnxViewMut},
+    layouts::VecZnx,
+};
+
+pub fn test_vec_znx_encode_vec_i64_lo_norm() {
+    let n: usize = 32;
+    let basek: usize = 17;
+    let size: usize = 5;
+    let k: usize = size * basek - 5;
+    let mut a: VecZnx<Vec<u8>> = VecZnx::alloc(n, 2, size);
+    let mut source: Source = Source::new([0u8; 32]);
+    let raw: &mut [i64] = a.raw_mut();
+    raw.iter_mut().enumerate().for_each(|(i, x)| *x = i as i64);
+    (0..a.cols()).for_each(|col_i| {
+        let mut have: Vec<i64> = vec![i64::default(); n];
+        have.iter_mut()
+            .for_each(|x| *x = (source.next_i64() << 56) >> 56);
+        a.encode_vec_i64(basek, col_i, k, &have, 10);
+        let mut want: Vec<i64> = vec![i64::default(); n];
+        a.decode_vec_i64(basek, col_i, k, &mut want);
+        assert_eq!(have, want, "{:?} != {:?}", &have, &want);
+    });
+}
+
+pub fn test_vec_znx_encode_vec_i64_hi_norm() {
+    let n: usize = 32;
+    let basek: usize = 17;
+    let size: usize = 5;
+    for k in [1, basek / 2, size * basek - 5] {
+        let mut a: VecZnx<Vec<u8>> = VecZnx::alloc(n, 2, size);
+        let mut source = Source::new([0u8; 32]);
+        let raw: &mut [i64] = a.raw_mut();
+        raw.iter_mut().enumerate().for_each(|(i, x)| *x = i as i64);
+        (0..a.cols()).for_each(|col_i| {
+            let mut have: Vec<i64> = vec![i64::default(); n];
+            have.iter_mut().for_each(|x| {
+                if k < 64 {
+                    *x = source.next_u64n(1 << k, (1 << k) - 1) as i64;
+                } else {
+                    *x = source.next_i64();
+                }
+            });
+            a.encode_vec_i64(basek, col_i, k, &have, 63);
+            let mut want: Vec<i64> = vec![i64::default(); n];
+            a.decode_vec_i64(basek, col_i, k, &mut want);
+            assert_eq!(have, want, "{:?} != {:?}", &have, &want);
+        })
+    }
+}

backend/src/hal/tests/vec_znx/generics.rs

@@ -1,14 +1,13 @@
-use itertools::izip;
 use sampling::source::Source;
 
 use crate::hal::{
-    api::{VecZnxAddNormal, VecZnxDecodeVeci64, VecZnxEncodeVeci64, VecZnxFillUniform, VecZnxStd, ZnxInfos, ZnxView, ZnxViewMut},
+    api::{VecZnxAddNormal, VecZnxFillUniform, ZnxView},
     layouts::{Backend, Module, VecZnx},
 };
 
 pub fn test_vec_znx_fill_uniform<B: Backend>(module: &Module<B>)
 where
-    Module<B>: VecZnxFillUniform + VecZnxStd,
+    Module<B>: VecZnxFillUniform,
 {
     let n: usize = module.n();
     let basek: usize = 17;
@@ -26,7 +25,7 @@ where
                     assert_eq!(a.at(col_j, limb_i), zero);
                 })
             } else {
-                let std: f64 = module.vec_znx_std(basek, &a, col_i);
+                let std: f64 = a.std(basek, col_i);
                 assert!(
                     (std - one_12_sqrt).abs() < 0.01,
                     "std={} ~!= {}",
@@ -40,7 +39,7 @@ where
 
 pub fn test_vec_znx_add_normal<B: Backend>(module: &Module<B>)
 where
-    Module<B>: VecZnxAddNormal + VecZnxStd,
+    Module<B>: VecZnxAddNormal,
 {
     let n: usize = module.n();
     let basek: usize = 17;
@@ -61,61 +60,9 @@ where
                     assert_eq!(a.at(col_j, limb_i), zero);
                 })
             } else {
-                let std: f64 = module.vec_znx_std(basek, &a, col_i) * k_f64;
+                let std: f64 = a.std(basek, col_i) * k_f64;
                 assert!((std - sigma).abs() < 0.1, "std={} ~!= {}", std, sigma);
             }
         })
     });
 }
-
-pub fn test_vec_znx_encode_vec_i64_lo_norm<B: Backend>(module: &Module<B>)
-where
-    Module<B>: VecZnxEncodeVeci64 + VecZnxDecodeVeci64,
-{
-    let n: usize = module.n();
-    let basek: usize = 17;
-    let size: usize = 5;
-    let k: usize = size * basek - 5;
-    let mut a: VecZnx<Vec<u8>> = VecZnx::alloc(n, 2, size);
-    let mut source: Source = Source::new([0u8; 32]);
-    let raw: &mut [i64] = a.raw_mut();
-    raw.iter_mut().enumerate().for_each(|(i, x)| *x = i as i64);
-    (0..a.cols()).for_each(|col_i| {
-        let mut have: Vec<i64> = vec![i64::default(); n];
-        have.iter_mut()
-            .for_each(|x| *x = (source.next_i64() << 56) >> 56);
-        module.encode_vec_i64(basek, &mut a, col_i, k, &have, 10);
-        let mut want: Vec<i64> = vec![i64::default(); n];
-        module.decode_vec_i64(basek, &a, col_i, k, &mut want);
-        izip!(want, have).for_each(|(a, b)| assert_eq!(a, b, "{} != {}", a, b));
-    });
-}
-
-pub fn test_vec_znx_encode_vec_i64_hi_norm<B: Backend>(module: &Module<B>)
-where
-    Module<B>: VecZnxEncodeVeci64 + VecZnxDecodeVeci64,
-{
-    let n: usize = module.n();
-    let basek: usize = 17;
-    let size: usize = 5;
-    for k in [1, basek / 2, size * basek - 5] {
-        let mut a: VecZnx<Vec<u8>> = VecZnx::alloc(n, 2, size);
-        let mut source = Source::new([0u8; 32]);
-        let raw: &mut [i64] = a.raw_mut();
-        raw.iter_mut().enumerate().for_each(|(i, x)| *x = i as i64);
-        (0..a.cols()).for_each(|col_i| {
-            let mut have: Vec<i64> = vec![i64::default(); n];
-            have.iter_mut().for_each(|x| {
-                if k < 64 {
-                    *x = source.next_u64n(1 << k, (1 << k) - 1) as i64;
-                } else {
-                    *x = source.next_i64();
-                }
-            });
-            module.encode_vec_i64(basek, &mut a, col_i, k, &have, 63);
-            let mut want: Vec<i64> = vec![i64::default(); n];
-            module.decode_vec_i64(basek, &a, col_i, k, &mut want);
-            izip!(want, have).for_each(|(a, b)| assert_eq!(a, b, "{} != {}", a, b));
-        })
-    }
-}

backend/src/hal/tests/vec_znx/mod.rs

@@ -1,2 +1,5 @@
 mod generics;
 pub use generics::*;
+
+#[cfg(test)]
+mod encoding;

backend/src/implementation/cpu_spqlios/test/vec_znx_fft64.rs

@@ -2,10 +2,7 @@ use crate::{
     hal::{
         api::ModuleNew,
         layouts::Module,
-        tests::vec_znx::{
+        tests::vec_znx::{test_vec_znx_add_normal, test_vec_znx_fill_uniform},
-            test_vec_znx_add_normal, test_vec_znx_encode_vec_i64_hi_norm, test_vec_znx_encode_vec_i64_lo_norm,
-            test_vec_znx_fill_uniform,
-        },
     },
     implementation::cpu_spqlios::FFT64,
 };
@@ -21,15 +18,3 @@ fn test_vec_znx_add_normal_fft64() {
     let module: Module<FFT64> = Module::<FFT64>::new(1 << 12);
     test_vec_znx_add_normal(&module);
 }
-
-#[test]
-fn test_vec_znx_encode_vec_lo_norm_fft64() {
-    let module: Module<FFT64> = Module::<FFT64>::new(1 << 8);
-    test_vec_znx_encode_vec_i64_lo_norm(&module);
-}
-
-#[test]
-fn test_vec_znx_encode_vec_hi_norm_fft64() {
-    let module: Module<FFT64> = Module::<FFT64>::new(1 << 8);
-    test_vec_znx_encode_vec_i64_hi_norm(&module);
-}

backend/src/implementation/cpu_spqlios/vec_znx.rs

@@ -1,29 +1,22 @@
 use itertools::izip;
 use rand_distr::Normal;
-use rug::{
-    Assign, Float,
-    float::Round,
-    ops::{AddAssignRound, DivAssignRound, SubAssignRound},
-};
 use sampling::source::Source;
 
 use crate::{
     hal::{
         api::{
-            TakeSlice, TakeVecZnx, VecZnxAddDistF64, VecZnxCopy, VecZnxDecodeVecFloat, VecZnxFillDistF64,
+            TakeSlice, TakeVecZnx, VecZnxAddDistF64, VecZnxCopy, VecZnxFillDistF64, VecZnxNormalizeTmpBytes, VecZnxRotate,
-            VecZnxNormalizeTmpBytes, VecZnxRotate, VecZnxRotateInplace, VecZnxSwithcDegree, ZnxInfos, ZnxSliceSize, ZnxView,
+            VecZnxRotateInplace, VecZnxSwithcDegree, ZnxInfos, ZnxSliceSize, ZnxView, ZnxViewMut, ZnxZero,
-            ZnxViewMut, ZnxZero,
         },
         layouts::{Backend, Module, ScalarZnx, ScalarZnxToRef, Scratch, VecZnx, VecZnxToMut, VecZnxToRef},
         oep::{
             VecZnxAddDistF64Impl, VecZnxAddImpl, VecZnxAddInplaceImpl, VecZnxAddNormalImpl, VecZnxAddScalarInplaceImpl,
-            VecZnxAutomorphismImpl, VecZnxAutomorphismInplaceImpl, VecZnxCopyImpl, VecZnxDecodeCoeffsi64Impl,
+            VecZnxAutomorphismImpl, VecZnxAutomorphismInplaceImpl, VecZnxCopyImpl, VecZnxFillDistF64Impl, VecZnxFillNormalImpl,
-            VecZnxDecodeVecFloatImpl, VecZnxDecodeVeci64Impl, VecZnxEncodeCoeffsi64Impl, VecZnxEncodeVeci64Impl,
+            VecZnxFillUniformImpl, VecZnxLshInplaceImpl, VecZnxMergeImpl, VecZnxMulXpMinusOneImpl,
-            VecZnxFillDistF64Impl, VecZnxFillNormalImpl, VecZnxFillUniformImpl, VecZnxLshInplaceImpl, VecZnxMergeImpl,
+            VecZnxMulXpMinusOneInplaceImpl, VecZnxNegateImpl, VecZnxNegateInplaceImpl, VecZnxNormalizeImpl,
-            VecZnxMulXpMinusOneImpl, VecZnxMulXpMinusOneInplaceImpl, VecZnxNegateImpl, VecZnxNegateInplaceImpl,
+            VecZnxNormalizeInplaceImpl, VecZnxNormalizeTmpBytesImpl, VecZnxRotateImpl, VecZnxRotateInplaceImpl,
-            VecZnxNormalizeImpl, VecZnxNormalizeInplaceImpl, VecZnxNormalizeTmpBytesImpl, VecZnxRotateImpl,
+            VecZnxRshInplaceImpl, VecZnxSplitImpl, VecZnxSubABInplaceImpl, VecZnxSubBAInplaceImpl, VecZnxSubImpl,
-            VecZnxRotateInplaceImpl, VecZnxRshInplaceImpl, VecZnxSplitImpl, VecZnxStdImpl, VecZnxSubABInplaceImpl,
+            VecZnxSubScalarInplaceImpl, VecZnxSwithcDegreeImpl,
-            VecZnxSubBAInplaceImpl, VecZnxSubImpl, VecZnxSubScalarInplaceImpl, VecZnxSwithcDegreeImpl,
         },
     },
     implementation::cpu_spqlios::{
@@ -857,35 +850,6 @@ where
     })
 }
 
-unsafe impl<B: Backend> VecZnxStdImpl<B> for B
-where
-    B: CPUAVX,
-{
-    fn vec_znx_std_impl<A>(module: &Module<B>, basek: usize, a: &A, a_col: usize) -> f64
-    where
-        A: VecZnxToRef,
-    {
-        let a: VecZnx<&[u8]> = a.to_ref();
-        let prec: u32 = (a.size() * basek) as u32;
-        let mut data: Vec<Float> = (0..a.n()).map(|_| Float::with_val(prec, 0)).collect();
-        module.decode_vec_float(basek, &a, a_col, &mut data);
-        // std = sqrt(sum((xi - avg)^2) / n)
-        let mut avg: Float = Float::with_val(prec, 0);
-        data.iter().for_each(|x| {
-            avg.add_assign_round(x, Round::Nearest);
-        });
-        avg.div_assign_round(Float::with_val(prec, data.len()), Round::Nearest);
-        data.iter_mut().for_each(|x| {
-            x.sub_assign_round(&avg, Round::Nearest);
-        });
-        let mut std: Float = Float::with_val(prec, 0);
-        data.iter().for_each(|x| std += x * x);
-        std.div_assign_round(Float::with_val(prec, data.len()), Round::Nearest);
-        std = std.sqrt();
-        std.to_f64()
-    }
-}
-
 unsafe impl<B: Backend> VecZnxFillUniformImpl<B> for B
 where
     B: CPUAVX,
@@ -1053,251 +1017,3 @@ where
         );
     }
 }
-
-unsafe impl<B: Backend> VecZnxEncodeVeci64Impl<B> for B
-where
-    B: CPUAVX,
-{
-    fn encode_vec_i64_impl<R>(
-        _module: &Module<B>,
-        basek: usize,
-        res: &mut R,
-        res_col: usize,
-        k: usize,
-        data: &[i64],
-        log_max: usize,
-    ) where
-        R: VecZnxToMut,
-    {
-        let size: usize = k.div_ceil(basek);
-
-        #[cfg(debug_assertions)]
-        {
-            let a: VecZnx<&mut [u8]> = res.to_mut();
-            assert!(
-                size <= a.size(),
-                "invalid argument k: k.div_ceil(basek)={} > a.size()={}",
-                size,
-                a.size()
-            );
-            assert!(res_col < a.cols());
-            assert!(data.len() <= a.n())
-        }
-
-        let data_len: usize = data.len();
-        let mut a: VecZnx<&mut [u8]> = res.to_mut();
-        let k_rem: usize = basek - (k % basek);
-
-        // Zeroes coefficients of the i-th column
-        (0..a.size()).for_each(|i| {
-            a.zero_at(res_col, i);
-        });
-
-        // If 2^{basek} * 2^{k_rem} < 2^{63}-1, then we can simply copy
-        // values on the last limb.
-        // Else we decompose values base2k.
-        if log_max + k_rem < 63 || k_rem == basek {
-            a.at_mut(res_col, size - 1)[..data_len].copy_from_slice(&data[..data_len]);
-        } else {
-            let mask: i64 = (1 << basek) - 1;
-            let steps: usize = size.min(log_max.div_ceil(basek));
-            (size - steps..size)
-                .rev()
-                .enumerate()
-                .for_each(|(i, i_rev)| {
-                    let shift: usize = i * basek;
-                    izip!(a.at_mut(res_col, i_rev).iter_mut(), data.iter()).for_each(|(y, x)| *y = (x >> shift) & mask);
-                })
-        }
-
-        // Case where self.prec % self.k != 0.
-        if k_rem != basek {
-            let steps: usize = size.min(log_max.div_ceil(basek));
-            (size - steps..size).rev().for_each(|i| {
-                a.at_mut(res_col, i)[..data_len]
-                    .iter_mut()
-                    .for_each(|x| *x <<= k_rem);
-            })
-        }
-    }
-}
-
-unsafe impl<B: Backend> VecZnxEncodeCoeffsi64Impl<B> for B
-where
-    B: CPUAVX,
-{
-    fn encode_coeff_i64_impl<R>(
-        _module: &Module<B>,
-        basek: usize,
-        res: &mut R,
-        res_col: usize,
-        k: usize,
-        i: usize,
-        data: i64,
-        log_max: usize,
-    ) where
-        R: VecZnxToMut,
-    {
-        let size: usize = k.div_ceil(basek);
-
-        #[cfg(debug_assertions)]
-        {
-            let a: VecZnx<&mut [u8]> = res.to_mut();
-            assert!(i < a.n());
-            assert!(
-                size <= a.size(),
-                "invalid argument k: k.div_ceil(basek)={} > a.size()={}",
-                size,
-                a.size()
-            );
-            assert!(res_col < a.cols());
-        }
-
-        let k_rem: usize = basek - (k % basek);
-        let mut a: VecZnx<&mut [u8]> = res.to_mut();
-        (0..a.size()).for_each(|j| a.at_mut(res_col, j)[i] = 0);
-
-        // If 2^{basek} * 2^{k_rem} < 2^{63}-1, then we can simply copy
-        // values on the last limb.
-        // Else we decompose values base2k.
-        if log_max + k_rem < 63 || k_rem == basek {
-            a.at_mut(res_col, size - 1)[i] = data;
-        } else {
-            let mask: i64 = (1 << basek) - 1;
-            let steps: usize = size.min(log_max.div_ceil(basek));
-            (size - steps..size)
-                .rev()
-                .enumerate()
-                .for_each(|(j, j_rev)| {
-                    a.at_mut(res_col, j_rev)[i] = (data >> (j * basek)) & mask;
-                })
-        }
-
-        // Case where prec % k != 0.
-        if k_rem != basek {
-            let steps: usize = size.min(log_max.div_ceil(basek));
-            (size - steps..size).rev().for_each(|j| {
-                a.at_mut(res_col, j)[i] <<= k_rem;
-            })
-        }
-    }
-}
-
-unsafe impl<B: Backend> VecZnxDecodeVeci64Impl<B> for B
-where
-    B: CPUAVX,
-{
-    fn decode_vec_i64_impl<R>(_module: &Module<B>, basek: usize, res: &R, res_col: usize, k: usize, data: &mut [i64])
-    where
-        R: VecZnxToRef,
-    {
-        let size: usize = k.div_ceil(basek);
-        #[cfg(debug_assertions)]
-        {
-            let a: VecZnx<&[u8]> = res.to_ref();
-            assert!(
-                data.len() >= a.n(),
-                "invalid data: data.len()={} < a.n()={}",
-                data.len(),
-                a.n()
-            );
-            assert!(res_col < a.cols());
-        }
-
-        let a: VecZnx<&[u8]> = res.to_ref();
-        data.copy_from_slice(a.at(res_col, 0));
-        let rem: usize = basek - (k % basek);
-        if k < basek {
-            data.iter_mut().for_each(|x| *x >>= rem);
-        } else {
-            (1..size).for_each(|i| {
-                if i == size - 1 && rem != basek {
-                    let k_rem: usize = basek - rem;
-                    izip!(a.at(res_col, i).iter(), data.iter_mut()).for_each(|(x, y)| {
-                        *y = (*y << k_rem) + (x >> rem);
-                    });
-                } else {
-                    izip!(a.at(res_col, i).iter(), data.iter_mut()).for_each(|(x, y)| {
-                        *y = (*y << basek) + x;
-                    });
-                }
-            })
-        }
-    }
-}
-
-unsafe impl<B: Backend> VecZnxDecodeCoeffsi64Impl<B> for B
-where
-    B: CPUAVX,
-{
-    fn decode_coeff_i64_impl<R>(_module: &Module<B>, basek: usize, res: &R, res_col: usize, k: usize, i: usize) -> i64
-    where
-        R: VecZnxToRef,
-    {
-        #[cfg(debug_assertions)]
-        {
-            let a: VecZnx<&[u8]> = res.to_ref();
-            assert!(i < a.n());
-            assert!(res_col < a.cols())
-        }
-
-        let a: VecZnx<&[u8]> = res.to_ref();
-        let size: usize = k.div_ceil(basek);
-        let mut res: i64 = 0;
-        let rem: usize = basek - (k % basek);
-        (0..size).for_each(|j| {
-            let x: i64 = a.at(res_col, j)[i];
-            if j == size - 1 && rem != basek {
-                let k_rem: usize = basek - rem;
-                res = (res << k_rem) + (x >> rem);
-            } else {
-                res = (res << basek) + x;
-            }
-        });
-        res
-    }
-}
-
-unsafe impl<B: Backend> VecZnxDecodeVecFloatImpl<B> for B
-where
-    B: CPUAVX,
-{
-    fn decode_vec_float_impl<R>(_module: &Module<B>, basek: usize, res: &R, res_col: usize, data: &mut [Float])
-    where
-        R: VecZnxToRef,
-    {
-        #[cfg(debug_assertions)]
-        {
-            let a: VecZnx<&[u8]> = res.to_ref();
-            assert!(
-                data.len() >= a.n(),
-                "invalid data: data.len()={} < a.n()={}",
-                data.len(),
-                a.n()
-            );
-            assert!(res_col < a.cols());
-        }
-
-        let a: VecZnx<&[u8]> = res.to_ref();
-        let size: usize = a.size();
-        let prec: u32 = (basek * size) as u32;
-
-        // 2^{basek}
-        let base = Float::with_val(prec, (1 << basek) as f64);
-
-        // y[i] = sum x[j][i] * 2^{-basek*j}
-        (0..size).for_each(|i| {
-            if i == 0 {
-                izip!(a.at(res_col, size - i - 1).iter(), data.iter_mut()).for_each(|(x, y)| {
-                    y.assign(*x);
-                    *y /= &base;
-                });
-            } else {
-                izip!(a.at(res_col, size - i - 1).iter(), data.iter_mut()).for_each(|(x, y)| {
-                    *y += Float::with_val(prec, *x);
-                    *y /= &base;
-                });
-            }
-        });
-    }
-}

bin_fhe/blind_rotation/key.rs

@@ -1,362 +0,0 @@
-use backend::hal::{
-    api::{
-        FillUniform, Reset, ScratchAvailable, SvpPPolAlloc, SvpPrepare, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace,
-        VmpPMatAlloc, VmpPMatPrepare, ZnxInfos, ZnxView, ZnxViewMut,
-    },
-    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, ScalarZnx, ScalarZnxToRef, Scratch, SvpPPol, WriterTo},
-};
-use sampling::source::Source;
-
-use crate::{
-    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>>,
-    pub(crate) dist: Distribution,
-}
-
-impl<D: DataRef> fmt::Debug for BlindRotationKeyCGGI<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: Data> PartialEq for BlindRotationKeyCGGI<D> {
-    fn eq(&self, other: &Self) -> bool {
-        if self.keys.len() != other.keys.len() {
-            return false;
-        }
-        for (a, b) in self.keys.iter().zip(other.keys.iter()) {
-            if a != b {
-                return false;
-            }
-        }
-        self.dist == other.dist
-    }
-}
-
-impl<D: Data> Eq for BlindRotationKeyCGGI<D> {}
-
-impl<D: DataRef> fmt::Display for BlindRotationKeyCGGI<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        for (i, key) in self.keys.iter().enumerate() {
-            write!(f, "key[{}]: {}", i, key)?;
-        }
-        writeln!(f, "{:?}", self.dist)
-    }
-}
-
-impl<D: DataMut> Reset for BlindRotationKeyCGGI<D> {
-    fn reset(&mut self) {
-        self.keys.iter_mut().for_each(|key| key.reset());
-        self.dist = Distribution::NONE;
-    }
-}
-
-impl<D: DataMut> FillUniform for BlindRotationKeyCGGI<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.keys
-            .iter_mut()
-            .for_each(|key| key.fill_uniform(source));
-    }
-}
-
-use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
-
-impl<D: DataMut> ReaderFrom for BlindRotationKeyCGGI<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        match Distribution::read_from(reader) {
-            Ok(dist) => self.dist = dist,
-            Err(e) => return Err(e),
-        }
-        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 BlindRotationKeyCGGI<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        match self.dist.write_to(writer) {
-            Ok(()) => {}
-            Err(e) => return Err(e),
-        }
-        writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
-        for key in &self.keys {
-            key.write_to(writer)?;
-        }
-        Ok(())
-    }
-}
-
-impl BlindRotationKeyCGGI<Vec<u8>> {
-    pub fn alloc(n_gglwe: usize, n_lwe: usize, basek: usize, k: usize, rows: usize, rank: usize) -> Self {
-        let mut data: Vec<GGSWCiphertext<Vec<u8>>> = Vec::with_capacity(n_lwe);
-        (0..n_lwe).for_each(|_| data.push(GGSWCiphertext::alloc(n_gglwe, basek, k, rows, 1, rank)));
-        Self {
-            keys: data,
-            dist: Distribution::NONE,
-        }
-    }
-
-    pub fn generate_from_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: GGSWEncryptSkFamily<B>,
-    {
-        GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k, rank)
-    }
-}
-
-impl<D: DataRef> BlindRotationKeyCGGI<D> {
-    #[allow(dead_code)]
-    pub(crate) fn n(&self) -> usize {
-        self.keys[0].n()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rows(&self) -> usize {
-        self.keys[0].rows()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn k(&self) -> usize {
-        self.keys[0].k()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn size(&self) -> usize {
-        self.keys[0].size()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rank(&self) -> usize {
-        self.keys[0].rank()
-    }
-
-    pub(crate) fn basek(&self) -> usize {
-        self.keys[0].basek()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn block_size(&self) -> usize {
-        match self.dist {
-            Distribution::BinaryBlock(value) => value,
-            _ => 1,
-        }
-    }
-}
-
-impl<D: DataMut> BlindRotationKeyCGGI<D> {
-    pub fn generate_from_sk<DataSkGLWE, DataSkLWE, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        sk_glwe: &GLWESecretExec<DataSkGLWE, B>,
-        sk_lwe: &LWESecret<DataSkLWE>,
-        source_xa: &mut Source,
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        DataSkGLWE: DataRef,
-        DataSkLWE: DataRef,
-        Module<B>: GGSWEncryptSkFamily<B> + VecZnxAddScalarInplace,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.keys.len(), sk_lwe.n());
-            assert!(sk_glwe.n() <= module.n());
-            assert_eq!(sk_glwe.rank(), self.keys[0].rank());
-            match sk_lwe.dist {
-                Distribution::BinaryBlock(_)
-                | Distribution::BinaryFixed(_)
-                | Distribution::BinaryProb(_)
-                | Distribution::ZERO => {}
-                _ => panic!(
-                    "invalid GLWESecret distribution: must be BinaryBlock, BinaryFixed or BinaryProb (or ZERO for debugging)"
-                ),
-            }
-        }
-
-        self.dist = sk_lwe.dist;
-
-        let mut pt: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(sk_glwe.n(), 1);
-        let sk_ref: ScalarZnx<&[u8]> = sk_lwe.data.to_ref();
-
-        self.keys.iter_mut().enumerate().for_each(|(i, ggsw)| {
-            pt.at_mut(0, 0)[0] = sk_ref.at(0, 0)[i];
-            ggsw.encrypt_sk(module, &pt, sk_glwe, source_xa, source_xe, sigma, scratch);
-        });
-    }
-}
-
-#[derive(PartialEq, Eq)]
-pub struct BlindRotationKeyCGGIExec<D: Data, B: Backend> {
-    pub(crate) data: Vec<GGSWCiphertextExec<D, B>>,
-    pub(crate) dist: Distribution,
-    pub(crate) x_pow_a: Option<Vec<SvpPPol<Vec<u8>, B>>>,
-}
-
-impl<D: Data, B: Backend> BlindRotationKeyCGGIExec<D, B> {
-    #[allow(dead_code)]
-    pub(crate) fn n(&self) -> usize {
-        self.data[0].n()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rows(&self) -> usize {
-        self.data[0].rows()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn k(&self) -> usize {
-        self.data[0].k()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn size(&self) -> usize {
-        self.data[0].size()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rank(&self) -> usize {
-        self.data[0].rank()
-    }
-
-    pub(crate) fn basek(&self) -> usize {
-        self.data[0].basek()
-    }
-
-    pub(crate) fn block_size(&self) -> usize {
-        match self.dist {
-            Distribution::BinaryBlock(value) => value,
-            _ => 1,
-        }
-    }
-}
-
-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> + VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut data: Vec<GGSWCiphertextExec<Vec<u8>, B>> = Vec::with_capacity(n_lwe);
-        (0..n_lwe).for_each(|_| {
-            data.push(GGSWCiphertextExec::alloc(
-                module, n_glwe, basek, k, rows, 1, rank,
-            ))
-        });
-        Self {
-            data,
-            dist: Distribution::NONE,
-            x_pow_a: None,
-        }
-    }
-
-    pub fn from<DataOther>(module: &Module<B>, other: &BlindRotationKeyCGGI<DataOther>, scratch: &mut Scratch<B>) -> Self
-    where
-        DataOther: DataRef,
-        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B> + VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut brk: BlindRotationKeyCGGIExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.n(),
-            other.keys.len(),
-            other.basek(),
-            other.k(),
-            other.rows(),
-            other.rank(),
-        );
-        brk.prepare(module, other, scratch);
-        brk
-    }
-}
-
-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> + VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.data.len(), other.keys.len());
-        }
-
-        let n: usize = other.n();
-
-        self.data
-            .iter_mut()
-            .zip(other.keys.iter())
-            .for_each(|(ggsw_exec, other)| {
-                ggsw_exec.prepare(module, other, scratch);
-            });
-
-        self.dist = other.dist;
-
-        match other.dist {
-            Distribution::BinaryBlock(_) => {
-                let mut x_pow_a: Vec<SvpPPol<Vec<u8>, B>> = Vec::with_capacity(n << 1);
-                let mut buf: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-                (0..n << 1).for_each(|i| {
-                    let mut res: SvpPPol<Vec<u8>, B> = module.svp_ppol_alloc(n, 1);
-                    set_xai_plus_y(module, i, 0, &mut res, &mut buf);
-                    x_pow_a.push(res);
-                });
-                self.x_pow_a = Some(x_pow_a);
-            }
-            _ => {}
-        }
-    }
-}
-
-pub fn set_xai_plus_y<A, C, B: Backend>(module: &Module<B>, ai: usize, y: i64, res: &mut SvpPPol<A, B>, buf: &mut ScalarZnx<C>)
-where
-    A: DataMut,
-    C: DataMut,
-    Module<B>: SvpPrepare<B>,
-{
-    let n: usize = res.n();
-
-    {
-        let raw: &mut [i64] = buf.at_mut(0, 0);
-        if ai < n {
-            raw[ai] = 1;
-        } else {
-            raw[(ai - n) & (n - 1)] = -1;
-        }
-        raw[0] += y;
-    }
-
-    module.svp_prepare(res, 0, buf, 0);
-
-    {
-        let raw: &mut [i64] = buf.at_mut(0, 0);
-
-        if ai < n {
-            raw[ai] = 0;
-        } else {
-            raw[(ai - n) & (n - 1)] = 0;
-        }
-        raw[0] = 0;
-    }
-}

bin_fhe/blind_rotation/key_compressed.rs

@@ -1,217 +0,0 @@
-use backend::hal::{
-    api::{FillUniform, Reset, ScratchAvailable, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, ZnxView, ZnxViewMut},
-    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, ScalarZnx, ScalarZnxToRef, Scratch, WriterTo},
-};
-use sampling::source::Source;
-
-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>>,
-    pub(crate) dist: Distribution,
-}
-
-impl<D: DataRef> fmt::Debug for BlindRotationKeyCGGICompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
-    }
-}
-
-impl<D: Data> PartialEq for BlindRotationKeyCGGICompressed<D> {
-    fn eq(&self, other: &Self) -> bool {
-        if self.keys.len() != other.keys.len() {
-            return false;
-        }
-        for (a, b) in self.keys.iter().zip(other.keys.iter()) {
-            if a != b {
-                return false;
-            }
-        }
-        self.dist == other.dist
-    }
-}
-
-impl<D: Data> Eq for BlindRotationKeyCGGICompressed<D> {}
-
-impl<D: DataRef> fmt::Display for BlindRotationKeyCGGICompressed<D> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        for (i, key) in self.keys.iter().enumerate() {
-            write!(f, "key[{}]: {}", i, key)?;
-        }
-        writeln!(f, "{:?}", self.dist)
-    }
-}
-
-impl<D: DataMut> Reset for BlindRotationKeyCGGICompressed<D> {
-    fn reset(&mut self) {
-        self.keys.iter_mut().for_each(|key| key.reset());
-        self.dist = Distribution::NONE;
-    }
-}
-
-impl<D: DataMut> FillUniform for BlindRotationKeyCGGICompressed<D> {
-    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
-        self.keys
-            .iter_mut()
-            .for_each(|key| key.fill_uniform(source));
-    }
-}
-
-use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
-
-impl<D: DataMut> ReaderFrom for BlindRotationKeyCGGICompressed<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        match Distribution::read_from(reader) {
-            Ok(dist) => self.dist = dist,
-            Err(e) => return Err(e),
-        }
-        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 BlindRotationKeyCGGICompressed<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        match self.dist.write_to(writer) {
-            Ok(()) => {}
-            Err(e) => return Err(e),
-        }
-        writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
-        for key in &self.keys {
-            key.write_to(writer)?;
-        }
-        Ok(())
-    }
-}
-
-impl BlindRotationKeyCGGICompressed<Vec<u8>> {
-    pub fn alloc(n_gglwe: usize, n_lwe: usize, basek: usize, k: usize, rows: usize, rank: usize) -> Self {
-        let mut data: Vec<GGSWCiphertextCompressed<Vec<u8>>> = Vec::with_capacity(n_lwe);
-        (0..n_lwe).for_each(|_| {
-            data.push(GGSWCiphertextCompressed::alloc(
-                n_gglwe, basek, k, rows, 1, rank,
-            ))
-        });
-        Self {
-            keys: data,
-            dist: Distribution::NONE,
-        }
-    }
-
-    pub fn generate_from_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: GGSWEncryptSkFamily<B>,
-    {
-        GGSWCiphertextCompressed::encrypt_sk_scratch_space(module, n, basek, k, rank)
-    }
-}
-
-impl<D: DataRef> BlindRotationKeyCGGICompressed<D> {
-    #[allow(dead_code)]
-    pub(crate) fn n(&self) -> usize {
-        self.keys[0].n()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rows(&self) -> usize {
-        self.keys[0].rows()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn k(&self) -> usize {
-        self.keys[0].k()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn size(&self) -> usize {
-        self.keys[0].size()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rank(&self) -> usize {
-        self.keys[0].rank()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn basek(&self) -> usize {
-        self.keys[0].basek()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn block_size(&self) -> usize {
-        match self.dist {
-            Distribution::BinaryBlock(value) => value,
-            _ => 1,
-        }
-    }
-}
-
-impl<D: DataMut> BlindRotationKeyCGGICompressed<D> {
-    pub fn generate_from_sk<DataSkGLWE, DataSkLWE, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        sk_glwe: &GLWESecretExec<DataSkGLWE, B>,
-        sk_lwe: &LWESecret<DataSkLWE>,
-        seed_xa: [u8; 32],
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        DataSkGLWE: DataRef,
-        DataSkLWE: DataRef,
-        Module<B>: GGSWEncryptSkFamily<B> + VecZnxAddScalarInplace,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.keys.len(), sk_lwe.n());
-            assert!(sk_glwe.n() <= module.n());
-            assert_eq!(sk_glwe.rank(), self.keys[0].rank());
-            match sk_lwe.dist {
-                Distribution::BinaryBlock(_)
-                | Distribution::BinaryFixed(_)
-                | Distribution::BinaryProb(_)
-                | Distribution::ZERO => {}
-                _ => panic!(
-                    "invalid GLWESecret distribution: must be BinaryBlock, BinaryFixed or BinaryProb (or ZERO for debugging)"
-                ),
-            }
-        }
-
-        self.dist = sk_lwe.dist;
-
-        let mut pt: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(sk_glwe.n(), 1);
-        let sk_ref: ScalarZnx<&[u8]> = sk_lwe.data.to_ref();
-
-        let mut source_xa: Source = Source::new(seed_xa);
-
-        self.keys.iter_mut().enumerate().for_each(|(i, ggsw)| {
-            pt.at_mut(0, 0)[0] = sk_ref.at(0, 0)[i];
-            ggsw.encrypt_sk(
-                module,
-                &pt,
-                sk_glwe,
-                source_xa.new_seed(),
-                source_xe,
-                sigma,
-                scratch,
-            );
-        });
-    }
-}

bin_fhe/blind_rotation/mod.rs

@@ -1,12 +0,0 @@
-mod cggi;
-mod key;
-mod key_compressed;
-mod lut;
-
-pub use cggi::*;
-pub use key::*;
-pub use key_compressed::*;
-pub use lut::*;
-
-#[cfg(test)]
-mod tests;

bin_fhe/blind_rotation/tests/generic_serialization.rs

@@ -1,15 +0,0 @@
-use backend::hal::tests::serialization::test_reader_writer_interface;
-
-use crate::{BlindRotationKeyCGGI, BlindRotationKeyCGGICompressed};
-
-#[test]
-fn test_cggi_blind_rotation_key_serialization() {
-    let original: BlindRotationKeyCGGI<Vec<u8>> = BlindRotationKeyCGGI::alloc(256, 64, 12, 54, 2, 2);
-    test_reader_writer_interface(original);
-}
-
-#[test]
-fn test_cggi_blind_rotation_key_compressed_serialization() {
-    let original: BlindRotationKeyCGGICompressed<Vec<u8>> = BlindRotationKeyCGGICompressed::alloc(256, 64, 12, 54, 2, 2);
-    test_reader_writer_interface(original);
-}

bin_fhe/blind_rotation/tests/generics_automorphism_key.rs

@@ -1,396 +0,0 @@
-use backend::hal::{
-    api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxAutomorphismInplace, VecZnxCopy,
-        VecZnxStd, VecZnxSubScalarInplace, VecZnxSwithcDegree,
-    },
-    layouts::{Backend, Module, ScratchOwned},
-    oep::{
-        ScratchAvailableImpl, ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeScalarZnxImpl, TakeSvpPPolImpl,
-        TakeVecZnxBigImpl, TakeVecZnxDftImpl, TakeVecZnxImpl,
-    },
-};
-use sampling::source::Source;
-
-use crate::{
-    AutomorphismKey, AutomorphismKeyCompressed, AutomorphismKeyEncryptSkFamily, AutomorphismKeyExec, GGLWEExecLayoutFamily,
-    GLWEDecryptFamily, GLWEKeyswitchFamily, GLWEPlaintext, GLWESecret, GLWESecretExec, Infos,
-    noise::log2_std_noise_gglwe_product,
-};
-
-pub(crate) trait AutomorphismTestModuleFamily<B: Backend> = AutomorphismKeyEncryptSkFamily<B>
-    + GLWEKeyswitchFamily<B>
-    + VecZnxAutomorphism
-    + GGLWEExecLayoutFamily<B>
-    + VecZnxSwithcDegree
-    + VecZnxAddScalarInplace
-    + VecZnxAutomorphism
-    + VecZnxAutomorphismInplace
-    + GLWEDecryptFamily<B>
-    + VecZnxSubScalarInplace
-    + VecZnxStd
-    + VecZnxCopy;
-pub(crate) trait AutomorphismTestScratchFamily<B: Backend> = ScratchOwnedAllocImpl<B>
-    + ScratchOwnedBorrowImpl<B>
-    + ScratchAvailableImpl<B>
-    + TakeScalarZnxImpl<B>
-    + TakeVecZnxDftImpl<B>
-    + TakeVecZnxImpl<B>
-    + TakeSvpPPolImpl<B>
-    + TakeVecZnxBigImpl<B>;
-
-pub(crate) fn test_automorphisk_key_encrypt_sk<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_ksk: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: AutomorphismTestModuleFamily<B>,
-    B: AutomorphismTestScratchFamily<B>,
-{
-    let n: usize = TakeScalarZnx;
-    let rows: usize = (k_ksk - digits * basek) / (digits * basek);
-
-    let mut atk: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_ksk, rows, digits, rank);
-
-    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(AutomorphismKey::encrypt_sk_scratch_space(
-        module, n, basek, k_ksk, rank,
-    ));
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk.fill_ternary_prob(0.5, &mut source_xs);
-
-    let p = -5;
-
-    atk.encrypt_sk(
-        module,
-        p,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut sk_out: GLWESecret<Vec<u8>> = sk.clone();
-    (0..atk.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,
-        );
-    });
-    let sk_out_exec = GLWESecretExec::from(module, &sk_out);
-
-    atk.key
-        .key
-        .assert_noise(module, &sk_out_exec, &sk.data, sigma);
-}
-
-pub(crate) fn test_automorphisk_key_encrypt_sk_compressed<B: Backend>(
-    module: &Module<B>,
-    basek: usize,
-    k_ksk: usize,
-    digits: usize,
-    rank: usize,
-    sigma: f64,
-) where
-    Module<B>: AutomorphismTestModuleFamily<B>,
-    B: AutomorphismTestScratchFamily<B>,
-{
-    let n: usize = TakeScalarZnx;
-    let rows: usize = (k_ksk - digits * basek) / (digits * basek);
-
-    let mut atk_compressed: AutomorphismKeyCompressed<Vec<u8>> =
-        AutomorphismKeyCompressed::alloc(n, basek, k_ksk, rows, digits, rank);
-
-    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(AutomorphismKey::encrypt_sk_scratch_space(
-        module, n, basek, k_ksk, rank,
-    ));
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
-    sk.fill_ternary_prob(0.5, &mut source_xs);
-
-    let p = -5;
-
-    let seed_xa: [u8; 32] = [1u8; 32];
-
-    atk_compressed.encrypt_sk(
-        module,
-        p,
-        &sk,
-        seed_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut sk_out: GLWESecret<Vec<u8>> = sk.clone();
-    (0..atk_compressed.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,
-        );
-    });
-    let sk_out_exec = GLWESecretExec::from(module, &sk_out);
-
-    let mut atk: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_ksk, rows, digits, rank);
-    atk.decompress(module, &atk_compressed);
-
-    atk.key
-        .key
-        .assert_noise(module, &sk_out_exec, &sk.data, sigma);
-}
-
-pub(crate) fn test_gglwe_automorphism<B: Backend>(
-    module: &Module<B>,
-    p0: i64,
-    p1: i64,
-    basek: usize,
-    digits: usize,
-    k_in: usize,
-    k_out: usize,
-    k_apply: usize,
-    sigma: f64,
-    rank: usize,
-) where
-    Module<B>: AutomorphismTestModuleFamily<B>,
-    B: AutomorphismTestScratchFamily<B>,
-{
-    let n: usize = TakeScalarZnx;
-    let digits_in: usize = 1;
-
-    let rows_in: usize = k_in / (basek * digits);
-    let rows_apply: usize = k_in.div_ceil(basek * digits);
-
-    let mut auto_key_in: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_in, rows_in, digits_in, rank);
-    let mut auto_key_out: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_out, rows_in, digits_in, rank);
-    let mut auto_key_apply: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_apply, rows_apply, digits, rank);
-
-    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(
-        AutomorphismKey::encrypt_sk_scratch_space(module, n, basek, k_apply, rank)
-            | AutomorphismKey::automorphism_scratch_space(module, n, basek, k_out, k_in, k_apply, digits, rank),
-    );
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(TakeScalarZnx, rank);
-    sk.fill_ternary_prob(0.5, &mut source_xs);
-
-    // gglwe_{s1}(s0) = s0 -> s1
-    auto_key_in.encrypt_sk(
-        module,
-        p0,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    // gglwe_{s2}(s1) -> s1 -> s2
-    auto_key_apply.encrypt_sk(
-        module,
-        p1,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut auto_key_apply_exec: AutomorphismKeyExec<Vec<u8>, B> =
-        AutomorphismKeyExec::alloc(module, n, basek, k_apply, rows_apply, digits, rank);
-
-    auto_key_apply_exec.prepare(module, &auto_key_apply, scratch.borrow());
-
-    // gglwe_{s1}(s0) (x) gglwe_{s2}(s1) = gglwe_{s2}(s0)
-    auto_key_out.automorphism(module, &auto_key_in, &auto_key_apply_exec, scratch.borrow());
-
-    let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(TakeScalarZnx, basek, k_out);
-
-    let mut sk_auto: GLWESecret<Vec<u8>> = GLWESecret::alloc(TakeScalarZnx, rank);
-    sk_auto.fill_zero(); // Necessary to avoid panic of unfilled sk
-    (0..rank).for_each(|i| {
-        module.vec_znx_automorphism(
-            module.galois_element_inv(p0 * p1),
-            &mut sk_auto.data.as_vec_znx_mut(),
-            i,
-            &sk.data.as_vec_znx(),
-            i,
-        );
-    });
-
-    let sk_auto_dft: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_auto);
-
-    (0..auto_key_out.rank_in()).for_each(|col_i| {
-        (0..auto_key_out.rows()).for_each(|row_i| {
-            auto_key_out
-                .at(row_i, col_i)
-                .decrypt(module, &mut pt, &sk_auto_dft, scratch.borrow());
-
-            module.vec_znx_sub_scalar_inplace(
-                &mut pt.data,
-                0,
-                (digits_in - 1) + row_i * digits_in,
-                &sk.data,
-                col_i,
-            );
-
-            let noise_have: f64 = module.vec_znx_std(basek, &pt.data, 0).log2();
-            let noise_want: f64 = log2_std_noise_gglwe_product(
-                TakeScalarZnx as f64,
-                basek * digits,
-                0.5,
-                0.5,
-                0f64,
-                sigma * sigma,
-                0f64,
-                rank as f64,
-                k_out,
-                k_apply,
-            );
-
-            assert!(
-                noise_have < noise_want + 0.5,
-                "{} {}",
-                noise_have,
-                noise_want
-            );
-        });
-    });
-}
-
-pub(crate) fn test_gglwe_automorphism_inplace<B: Backend>(
-    module: &Module<B>,
-    p0: i64,
-    p1: i64,
-    basek: usize,
-    digits: usize,
-    k_in: usize,
-    k_apply: usize,
-    sigma: f64,
-    rank: usize,
-) where
-    Module<B>: AutomorphismTestModuleFamily<B>,
-    B: AutomorphismTestScratchFamily<B>,
-{
-    let n: usize = TakeScalarZnx;
-    let digits_in: usize = 1;
-
-    let rows_in: usize = k_in / (basek * digits);
-    let rows_apply: usize = k_in.div_ceil(basek * digits);
-
-    let mut auto_key: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_in, rows_in, digits_in, rank);
-    let mut auto_key_apply: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_apply, rows_apply, digits, rank);
-
-    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(
-        AutomorphismKey::encrypt_sk_scratch_space(module, n, basek, k_apply, rank)
-            | AutomorphismKey::automorphism_inplace_scratch_space(module, n, basek, k_in, k_apply, digits, rank),
-    );
-
-    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(TakeScalarZnx, rank);
-    sk.fill_ternary_prob(0.5, &mut source_xs);
-
-    // gglwe_{s1}(s0) = s0 -> s1
-    auto_key.encrypt_sk(
-        module,
-        p0,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    // gglwe_{s2}(s1) -> s1 -> s2
-    auto_key_apply.encrypt_sk(
-        module,
-        p1,
-        &sk,
-        &mut source_xa,
-        &mut source_xe,
-        sigma,
-        scratch.borrow(),
-    );
-
-    let mut auto_key_apply_exec: AutomorphismKeyExec<Vec<u8>, B> =
-        AutomorphismKeyExec::alloc(module, n, basek, k_apply, rows_apply, digits, rank);
-
-    auto_key_apply_exec.prepare(module, &auto_key_apply, scratch.borrow());
-
-    // gglwe_{s1}(s0) (x) gglwe_{s2}(s1) = gglwe_{s2}(s0)
-    auto_key.automorphism_inplace(module, &auto_key_apply_exec, scratch.borrow());
-
-    let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(TakeScalarZnx, basek, k_in);
-
-    let mut sk_auto: GLWESecret<Vec<u8>> = GLWESecret::alloc(TakeScalarZnx, rank);
-    sk_auto.fill_zero(); // Necessary to avoid panic of unfilled sk
-
-    (0..rank).for_each(|i| {
-        module.vec_znx_automorphism(
-            module.galois_element_inv(p0 * p1),
-            &mut sk_auto.data.as_vec_znx_mut(),
-            i,
-            &sk.data.as_vec_znx(),
-            i,
-        );
-    });
-
-    let sk_auto_dft: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_auto);
-
-    (0..auto_key.rank_in()).for_each(|col_i| {
-        (0..auto_key.rows()).for_each(|row_i| {
-            auto_key
-                .at(row_i, col_i)
-                .decrypt(module, &mut pt, &sk_auto_dft, scratch.borrow());
-            module.vec_znx_sub_scalar_inplace(
-                &mut pt.data,
-                0,
-                (digits_in - 1) + row_i * digits_in,
-                &sk.data,
-                col_i,
-            );
-
-            let noise_have: f64 = module.vec_znx_std(basek, &pt.data, 0).log2();
-            let noise_want: f64 = log2_std_noise_gglwe_product(
-                TakeScalarZnx as f64,
-                basek * digits,
-                0.5,
-                0.5,
-                0f64,
-                sigma * sigma,
-                0f64,
-                rank as f64,
-                k_in,
-                k_apply,
-            );
-
-            assert!(
-                noise_have < noise_want + 0.5,
-                "{} {}",
-                noise_have,
-                noise_want
-            );
-        });
-    });
-}

bin_fhe/blind_rotation/tests/key.rs

@@ -1,321 +0,0 @@
-use backend::hal::{
-    api::{ScratchAvailable, SvpPPolAlloc, SvpPrepare, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, 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,
-};
-
-pub struct BlindRotationKeyCGGI<D: Data> {
-    pub(crate) keys: Vec<GGSWCiphertext<D>>,
-    pub(crate) dist: Distribution,
-}
-
-impl<D: Data> PartialEq for BlindRotationKeyCGGI<D> {
-    fn eq(&self, other: &Self) -> bool {
-        if self.keys.len() != other.keys.len() {
-            return false;
-        }
-        for (a, b) in self.keys.iter().zip(other.keys.iter()) {
-            if a != b {
-                return false;
-            }
-        }
-        self.dist == other.dist
-    }
-}
-
-impl<D: Data> Eq for BlindRotationKeyCGGI<D> {}
-
-use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
-
-impl<D: DataMut> ReaderFrom for BlindRotationKeyCGGI<D> {
-    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
-        match Distribution::read_from(reader) {
-            Ok(dist) => self.dist = dist,
-            Err(e) => return Err(e),
-        }
-        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 BlindRotationKeyCGGI<D> {
-    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
-        match self.dist.write_to(writer) {
-            Ok(()) => {}
-            Err(e) => return Err(e),
-        }
-        writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
-        for key in &self.keys {
-            key.write_to(writer)?;
-        }
-        Ok(())
-    }
-}
-
-impl BlindRotationKeyCGGI<Vec<u8>> {
-    pub fn alloc(n_gglwe: usize, n_lwe: usize, basek: usize, k: usize, rows: usize, rank: usize) -> Self {
-        let mut data: Vec<GGSWCiphertext<Vec<u8>>> = Vec::with_capacity(n_lwe);
-        (0..n_lwe).for_each(|_| data.push(GGSWCiphertext::alloc(n_gglwe, basek, k, rows, 1, rank)));
-        Self {
-            keys: data,
-            dist: Distribution::NONE,
-        }
-    }
-
-    pub fn generate_from_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
-    where
-        Module<B>: GGSWEncryptSkFamily<B>,
-    {
-        GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k, rank)
-    }
-}
-
-impl<D: DataRef> BlindRotationKeyCGGI<D> {
-    #[allow(dead_code)]
-    pub(crate) fn n(&self) -> usize {
-        self.keys[0].n()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rows(&self) -> usize {
-        self.keys[0].rows()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn k(&self) -> usize {
-        self.keys[0].k()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn size(&self) -> usize {
-        self.keys[0].size()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rank(&self) -> usize {
-        self.keys[0].rank()
-    }
-
-    pub(crate) fn basek(&self) -> usize {
-        self.keys[0].basek()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn block_size(&self) -> usize {
-        match self.dist {
-            Distribution::BinaryBlock(value) => value,
-            _ => 1,
-        }
-    }
-}
-
-impl<D: DataMut> BlindRotationKeyCGGI<D> {
-    pub fn generate_from_sk<DataSkGLWE, DataSkLWE, B: Backend>(
-        &mut self,
-        module: &Module<B>,
-        sk_glwe: &GLWESecretExec<DataSkGLWE, B>,
-        sk_lwe: &LWESecret<DataSkLWE>,
-        source_xa: &mut Source,
-        source_xe: &mut Source,
-        sigma: f64,
-        scratch: &mut Scratch<B>,
-    ) where
-        DataSkGLWE: DataRef,
-        DataSkLWE: DataRef,
-        Module<B>: GGSWEncryptSkFamily<B> + VecZnxAddScalarInplace,
-        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.keys.len(), sk_lwe.n());
-            assert!(sk_glwe.n() <= TakeScalarZnx);
-            assert_eq!(sk_glwe.rank(), self.keys[0].rank());
-            match sk_lwe.dist {
-                Distribution::BinaryBlock(_)
-                | Distribution::BinaryFixed(_)
-                | Distribution::BinaryProb(_)
-                | Distribution::ZERO => {}
-                _ => panic!(
-                    "invalid GLWESecret distribution: must be BinaryBlock, BinaryFixed or BinaryProb (or ZERO for debugging)"
-                ),
-            }
-        }
-
-        self.dist = sk_lwe.dist;
-
-        let mut pt: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(sk_glwe.n(), 1);
-        let sk_ref: ScalarZnx<&[u8]> = sk_lwe.data.to_ref();
-
-        self.keys.iter_mut().enumerate().for_each(|(i, ggsw)| {
-            pt.at_mut(0, 0)[0] = sk_ref.at(0, 0)[i];
-            ggsw.encrypt_sk(module, &pt, sk_glwe, source_xa, source_xe, sigma, scratch);
-        });
-    }
-}
-
-#[derive(PartialEq, Eq)]
-pub struct BlindRotationKeyCGGIExec<D: Data, B: Backend> {
-    pub(crate) data: Vec<GGSWCiphertextExec<D, B>>,
-    pub(crate) dist: Distribution,
-    pub(crate) x_pow_a: Option<Vec<SvpPPol<Vec<u8>, B>>>,
-}
-
-impl<D: Data, B: Backend> BlindRotationKeyCGGIExec<D, B> {
-    #[allow(dead_code)]
-    pub(crate) fn n(&self) -> usize {
-        self.data[0].n()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rows(&self) -> usize {
-        self.data[0].rows()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn k(&self) -> usize {
-        self.data[0].k()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn size(&self) -> usize {
-        self.data[0].size()
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn rank(&self) -> usize {
-        self.data[0].rank()
-    }
-
-    pub(crate) fn basek(&self) -> usize {
-        self.data[0].basek()
-    }
-
-    pub(crate) fn block_size(&self) -> usize {
-        match self.dist {
-            Distribution::BinaryBlock(value) => value,
-            _ => 1,
-        }
-    }
-}
-
-pub trait BlindRotationKeyCGGIExecLayoutFamily<B: Backend> = GGSWLayoutFamily<B> + 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>,
-    {
-        let mut data: Vec<GGSWCiphertextExec<Vec<u8>, B>> = Vec::with_capacity(n_lwe);
-        (0..n_lwe).for_each(|_| {
-            data.push(GGSWCiphertextExec::alloc(
-                module, n_glwe, basek, k, rows, 1, rank,
-            ))
-        });
-        Self {
-            data,
-            dist: Distribution::NONE,
-            x_pow_a: None,
-        }
-    }
-
-    pub fn from<DataOther>(module: &Module<B>, other: &BlindRotationKeyCGGI<DataOther>, scratch: &mut Scratch<B>) -> Self
-    where
-        DataOther: DataRef,
-        Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B>,
-    {
-        let mut brk: BlindRotationKeyCGGIExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.n(),
-            other.keys.len(),
-            other.basek(),
-            other.k(),
-            other.rows(),
-            other.rank(),
-        );
-        brk.prepare(module, other, scratch);
-        brk
-    }
-}
-
-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>,
-    {
-        #[cfg(debug_assertions)]
-        {
-            assert_eq!(self.data.len(), other.keys.len());
-        }
-
-        let n: usize = other.n();
-
-        self.data
-            .iter_mut()
-            .zip(other.keys.iter())
-            .for_each(|(ggsw_exec, other)| {
-                ggsw_exec.prepare(module, other, scratch);
-            });
-
-        self.dist = other.dist;
-
-        match other.dist {
-            Distribution::BinaryBlock(_) => {
-                let mut x_pow_a: Vec<SvpPPol<Vec<u8>, B>> = Vec::with_capacity(n << 1);
-                let mut buf: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
-                (0..n << 1).for_each(|i| {
-                    let mut res: SvpPPol<Vec<u8>, B> = module.svp_ppol_alloc(n, 1);
-                    set_xai_plus_y(module, i, 0, &mut res, &mut buf);
-                    x_pow_a.push(res);
-                });
-                self.x_pow_a = Some(x_pow_a);
-            }
-            _ => {}
-        }
-    }
-}
-
-pub fn set_xai_plus_y<A, C, B: Backend>(module: &Module<B>, ai: usize, y: i64, res: &mut SvpPPol<A, B>, buf: &mut ScalarZnx<C>)
-where
-    A: DataMut,
-    C: DataMut,
-    Module<B>: SvpPrepare<B>,
-{
-    let n: usize = res.n();
-
-    {
-        let raw: &mut [i64] = buf.at_mut(0, 0);
-        if ai < n {
-            raw[ai] = 1;
-        } else {
-            raw[(ai - n) & (n - 1)] = -1;
-        }
-        raw[0] += y;
-    }
-
-    module.svp_prepare(res, 0, buf, 0);
-
-    {
-        let raw: &mut [i64] = buf.at_mut(0, 0);
-
-        if ai < n {
-            raw[ai] = 0;
-        } else {
-            raw[(ai - n) & (n - 1)] = 0;
-        }
-        raw[0] = 0;
-    }
-}

bin_fhe/blind_rotation/tests/mod.rs

@@ -1,4 +0,0 @@
-mod cpu_spqlios;
-mod generic_cggi;
-mod generic_lut;
-mod generic_serialization;

bin_fhe/circuit_bootstrapping/mod.rs

@@ -1,6 +0,0 @@
-mod circuit_bootstrapping;
-
-pub use circuit_bootstrapping::*;
-
-#[cfg(test)]
-mod test_fft64;

bin_fhe/circuit_bootstrapping/test_fft64/mod.rs

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

core/benches/external_product_glwe_fft64.rs

@@ -1,4 +1,7 @@
-use core::layouts::{prepared::{GGSWCiphertextExec, GLWESecretExec}, GGSWCiphertext, GLWECiphertext, GLWESecret, Infos};
+use core::layouts::{
+    GGSWCiphertext, GLWECiphertext, GLWESecret, Infos,
+    prepared::{GGSWCiphertextPrepared, GLWESecretPrepared, PrepareAlloc},
+};
 use std::hint::black_box;
 
 use backend::{
@@ -63,7 +66,7 @@ fn bench_external_product_glwe_fft64(c: &mut Criterion) {
 
         let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
         sk.fill_ternary_prob(0.5, &mut source_xs);
-        let sk_dft: GLWESecretExec<Vec<u8>, FFT64> = GLWESecretExec::from(&module, &sk);
+        let sk_dft: GLWESecretPrepared<Vec<u8>, FFT64> = sk.prepare_alloc(&module, scratch.borrow());
 
         ct_ggsw.encrypt_sk(
             &module,
@@ -84,10 +87,10 @@ fn bench_external_product_glwe_fft64(c: &mut Criterion) {
             scratch.borrow(),
         );
 
-        let ggsw_exec: GGSWCiphertextExec<Vec<u8>, FFT64> = GGSWCiphertextExec::from(&module, &ct_ggsw, scratch.borrow());
+        let ggsw_prepared: GGSWCiphertextPrepared<Vec<u8>, FFT64> = ct_ggsw.prepare_alloc(&module, scratch.borrow());
 
         move || {
-            black_box(ct_glwe_out.external_product(&module, &ct_glwe_in, &ggsw_exec, scratch.borrow()));
+            black_box(ct_glwe_out.external_product(&module, &ct_glwe_in, &ggsw_prepared, scratch.borrow()));
         }
     }
 
@@ -157,7 +160,7 @@ fn bench_external_product_glwe_inplace_fft64(c: &mut Criterion) {
 
         let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
         sk.fill_ternary_prob(0.5, &mut source_xs);
-        let sk_dft: GLWESecretExec<Vec<u8>, FFT64> = GLWESecretExec::from(&module, &sk);
+        let sk_dft: GLWESecretPrepared<Vec<u8>, FFT64> = sk.prepare_alloc(&module, scratch.borrow());
 
         ct_ggsw.encrypt_sk(
             &module,
@@ -178,11 +181,11 @@ fn bench_external_product_glwe_inplace_fft64(c: &mut Criterion) {
             scratch.borrow(),
         );
 
-        let ggsw_exec: GGSWCiphertextExec<Vec<u8>, FFT64> = GGSWCiphertextExec::from(&module, &ct_ggsw, scratch.borrow());
+        let ggsw_prepared: GGSWCiphertextPrepared<Vec<u8>, FFT64> = ct_ggsw.prepare_alloc(&module, scratch.borrow());
 
         move || {
             let scratch_borrow = scratch.borrow();
-            black_box(ct_glwe.external_product_inplace(&module, &ggsw_exec, scratch_borrow));
+            black_box(ct_glwe.external_product_inplace(&module, &ggsw_prepared, scratch_borrow));
         }
     }
 

core/benches/keyswitch_glwe_fft64.rs

@@ -1,4 +1,7 @@
-use core::layouts::{prepared::{GGLWEAutomorphismKeyExec, GGLWESwitchingKeyExec, GLWESecretExec}, GGLWEAutomorphismKey, GGLWESwitchingKey, GLWECiphertext, GLWESecret, Infos};
+use core::layouts::{
+    GGLWEAutomorphismKey, GGLWESwitchingKey, GLWECiphertext, GLWESecret, Infos,
+    prepared::{GGLWEAutomorphismKeyPrepared, GGLWESwitchingKeyPrepared, GLWESecretPrepared, PrepareAlloc},
+};
 use std::{hint::black_box, time::Duration};
 
 use backend::{
@@ -66,7 +69,7 @@ fn bench_keyswitch_glwe_fft64(c: &mut Criterion) {
 
         let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in);
         sk_in.fill_ternary_prob(0.5, &mut source_xs);
-        let sk_in_dft: GLWESecretExec<Vec<u8>, FFT64> = GLWESecretExec::from(&module, &sk_in);
+        let sk_in_dft: GLWESecretPrepared<Vec<u8>, FFT64> = sk_in.prepare_alloc(&module, scratch.borrow());
 
         let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out);
         sk_out.fill_ternary_prob(0.5, &mut source_xs);
@@ -90,10 +93,10 @@ fn bench_keyswitch_glwe_fft64(c: &mut Criterion) {
             scratch.borrow(),
         );
 
-        let ksk_exec: GGLWEAutomorphismKeyExec<Vec<u8>, _> = GGLWEAutomorphismKeyExec::from(&module, &ksk, scratch.borrow());
+        let ksk_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, _> = ksk.prepare_alloc(&module, scratch.borrow());
 
         move || {
-            black_box(ct_out.automorphism(&module, &ct_in, &ksk_exec, scratch.borrow()));
+            black_box(ct_out.automorphism(&module, &ct_in, &ksk_prepared, scratch.borrow()));
         }
     }
 
@@ -161,7 +164,7 @@ fn bench_keyswitch_glwe_inplace_fft64(c: &mut Criterion) {
 
         let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
         sk_in.fill_ternary_prob(0.5, &mut source_xs);
-        let sk_in_dft: GLWESecretExec<Vec<u8>, FFT64> = GLWESecretExec::from(&module, &sk_in);
+        let sk_in_dft: GLWESecretPrepared<Vec<u8>, FFT64> = sk_in.prepare_alloc(&module, scratch.borrow());
 
         let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
         sk_out.fill_ternary_prob(0.5, &mut source_xs);
@@ -185,10 +188,10 @@ fn bench_keyswitch_glwe_inplace_fft64(c: &mut Criterion) {
             scratch.borrow(),
         );
 
-        let ksk_exec: GGLWESwitchingKeyExec<Vec<u8>, FFT64> = GGLWESwitchingKeyExec::from(&module, &ksk, scratch.borrow());
+        let ksk_prepared: GGLWESwitchingKeyPrepared<Vec<u8>, FFT64> = ksk.prepare_alloc(&module, scratch.borrow());
 
         move || {
-            black_box(ct.keyswitch_inplace(&module, &ksk_exec, scratch.borrow()));
+            black_box(ct.keyswitch_inplace(&module, &ksk_prepared, scratch.borrow()));
         }
     }
 

core/src/automorphism/gglwe_atk.rs

@@ -4,7 +4,7 @@ use backend::hal::{
 };
 
 use crate::{
-    layouts::{GGLWEAutomorphismKey, GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyExec},
+    layouts::{GGLWEAutomorphismKey, GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyPrepared},
     trait_families::GLWEKeyswitchFamily,
 };
 
@@ -46,7 +46,7 @@ impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGLWEAutomorphismKey<DataLhs>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxAutomorphism + VecZnxAutomorphismInplace,
@@ -120,7 +120,7 @@ impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
     pub fn automorphism_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxAutomorphism + VecZnxAutomorphismInplace,

core/src/automorphism/ggsw_ct.rs

@@ -6,7 +6,7 @@ use backend::hal::{
 use crate::{
     layouts::{
         GGSWCiphertext, GLWECiphertext, Infos,
-        prepared::{GGLWEAutomorphismKeyExec, GGLWETensorKeyExec},
+        prepared::{GGLWEAutomorphismKeyPrepared, GGLWETensorKeyPrepared},
     },
     trait_families::{GGSWKeySwitchFamily, GLWEKeyswitchFamily},
 };
@@ -60,8 +60,8 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        auto_key: &GGLWEAutomorphismKeyExec<DataAk, B>,
+        auto_key: &GGLWEAutomorphismKeyPrepared<DataAk, B>,
-        tensor_key: &GGLWETensorKeyExec<DataTsk, B>,
+        tensor_key: &GGLWETensorKeyPrepared<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxAutomorphismInplace + VecZnxNormalizeTmpBytes,
@@ -117,8 +117,8 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     pub fn automorphism_inplace<DataKsk: DataRef, DataTsk: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        auto_key: &GGLWEAutomorphismKeyExec<DataKsk, B>,
+        auto_key: &GGLWEAutomorphismKeyPrepared<DataKsk, B>,
-        tensor_key: &GGLWETensorKeyExec<DataTsk, B>,
+        tensor_key: &GGLWETensorKeyPrepared<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxAutomorphismInplace + VecZnxNormalizeTmpBytes,
@@ -134,7 +134,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        auto_key: &GGLWEAutomorphismKeyExec<DataAk, B>,
+        auto_key: &GGLWEAutomorphismKeyPrepared<DataAk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxAutomorphismInplace + VecZnxNormalizeTmpBytes,

core/src/automorphism/glwe_ct.rs

@@ -7,7 +7,7 @@ use backend::hal::{
 };
 
 use crate::{
-    layouts::{GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyExec},
+    layouts::{GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyPrepared},
     trait_families::GLWEKeyswitchFamily,
 };
 
@@ -49,7 +49,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxAutomorphismInplace,
@@ -64,7 +64,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn automorphism_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxAutomorphismInplace,
@@ -80,7 +80,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B>,
@@ -102,7 +102,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn automorphism_add_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B>,
@@ -118,7 +118,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B> + VecZnxBigSubSmallAInplace<B>,
@@ -140,7 +140,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn automorphism_sub_ab_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B> + VecZnxBigSubSmallAInplace<B>,
@@ -156,7 +156,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B> + VecZnxBigSubSmallBInplace<B>,
@@ -178,7 +178,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn automorphism_sub_ba_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + VecZnxBigAutomorphismInplace<B> + VecZnxBigSubSmallBInplace<B>,

core/src/conversion/glwe_to_lwe.rs

@@ -5,7 +5,7 @@ use backend::hal::{
 
 use crate::{
     TakeGLWECt,
-    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::GLWEToLWESwitchingKeyExec},
+    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::GLWEToLWESwitchingKeyPrepared},
 };
 
 use crate::trait_families::GLWEKeyswitchFamily;
@@ -50,7 +50,7 @@ impl<DLwe: DataMut> LWECiphertext<DLwe> {
         &mut self,
         module: &Module<B>,
         a: &GLWECiphertext<DGlwe>,
-        ks: &GLWEToLWESwitchingKeyExec<DKs, B>,
+        ks: &GLWEToLWESwitchingKeyPrepared<DKs, B>,
         scratch: &mut Scratch<B>,
     ) where
         DGlwe: DataRef,

core/src/conversion/lwe_to_glwe.rs

@@ -5,7 +5,7 @@ use backend::hal::{
 
 use crate::{
     TakeGLWECt,
-    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::LWEToGLWESwitchingKeyExec},
+    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::LWEToGLWESwitchingKeyPrepared},
 };
 
 use crate::trait_families::GLWEKeyswitchFamily;
@@ -33,7 +33,7 @@ impl<D: DataMut> GLWECiphertext<D> {
         &mut self,
         module: &Module<B>,
         lwe: &LWECiphertext<DLwe>,
-        ksk: &LWEToGLWESwitchingKeyExec<DKsk, B>,
+        ksk: &LWEToGLWESwitchingKeyPrepared<DKsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         DLwe: DataRef,

core/src/decryption/glwe_ct.rs

@@ -7,7 +7,7 @@ use backend::hal::{
 };
 
 use crate::{
-    layouts::{GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretExec},
+    layouts::{GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretPrepared},
     trait_families::GLWEDecryptFamily,
 };
 
@@ -27,7 +27,7 @@ impl<DataSelf: DataRef> GLWECiphertext<DataSelf> {
         &self,
         module: &Module<B>,
         pt: &mut GLWEPlaintext<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEDecryptFamily<B>,

core/src/dist.rs

@@ -1,7 +1,7 @@
 use std::io::{Read, Result, Write};
 
 #[derive(Clone, Copy, Debug)]
-pub(crate) enum Distribution {
+pub enum Distribution {
     TernaryFixed(usize), // Ternary with fixed Hamming weight
     TernaryProb(f64),    // Ternary with probabilistic Hamming weight
     BinaryFixed(usize),  // Binary with fixed Hamming weight

core/src/encryption/compressed/gglwe_atk.rs

@@ -8,19 +8,19 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecret, TakeGLWESecretExec,
+    TakeGLWESecret, TakeGLWESecretPrepared,
     layouts::{
         GLWESecret, Infos,
         compressed::{GGLWEAutomorphismKeyCompressed, GGLWESwitchingKeyCompressed},
     },
 };
 
-use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 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>,
+        Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
         GGLWESwitchingKeyCompressed::encrypt_sk_scratch_space(module, n, basek, k, rank, rank) + GLWESecret::bytes_of(n, rank)
     }
@@ -41,8 +41,8 @@ impl<DataSelf: DataMut> GGLWEAutomorphismKeyCompressed<DataSelf> {
             + VecZnxSwithcDegree
             + VecZnxAutomorphism
             + VecZnxAddScalarInplace
-            + GLWESecretExecModuleFamily<B>,
+            + GLWESecretPreparedModuleFamily<B>,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretPrepared<B> + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {

core/src/encryption/compressed/gglwe_ct.rs

@@ -7,7 +7,7 @@ use sampling::source::Source;
 use crate::{
     TakeGLWEPt,
     encryption::glwe_encrypt_sk_internal,
-    layouts::{GGLWECiphertext, Infos, compressed::GGLWECiphertextCompressed, prepared::GLWESecretExec},
+    layouts::{GGLWECiphertext, Infos, compressed::GGLWECiphertextCompressed, prepared::GLWESecretPrepared},
 };
 
 use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily};
@@ -26,7 +26,7 @@ impl<D: DataMut> GGLWECiphertextCompressed<D> {
         &mut self,
         module: &Module<B>,
         pt: &ScalarZnx<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         seed: [u8; 32],
         source_xe: &mut Source,
         sigma: f64,

core/src/encryption/compressed/gglwe_ksk.rs

@@ -5,13 +5,14 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecretExec,
+    TakeGLWESecretPrepared,
     layouts::{
-        GGLWECiphertext, GLWESecret, GGLWESwitchingKey, Infos, compressed::GGLWESwitchingKeyCompressed, prepared::GLWESecretExec,
+        GGLWECiphertext, GGLWESwitchingKey, GLWESecret, Infos, compressed::GGLWESwitchingKeyCompressed,
+        prepared::GLWESecretPrepared,
     },
 };
 
-use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 impl GGLWESwitchingKeyCompressed<Vec<u8>> {
     pub fn encrypt_sk_scratch_space<B: Backend>(
@@ -23,11 +24,11 @@ impl GGLWESwitchingKeyCompressed<Vec<u8>> {
         rank_out: usize,
     ) -> usize
     where
-        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<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)
+            + GLWESecretPrepared::bytes_of(module, n, rank_out)
     }
 }
 
@@ -43,8 +44,9 @@ impl<DataSelf: DataMut> GGLWESwitchingKeyCompressed<DataSelf> {
         scratch: &mut Scratch<B>,
     ) where
         Module<B>:
-            GGLWESwitchingKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretExecModuleFamily<B>,
+            GGLWESwitchingKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretPreparedModuleFamily<B>,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + ScratchAvailable + TakeVecZnx,
+        Scratch<B>:
+            ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretPrepared<B> + ScratchAvailable + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {
@@ -85,7 +87,7 @@ impl<DataSelf: DataMut> GGLWESwitchingKeyCompressed<DataSelf> {
             );
         });
 
-        let (mut sk_out_tmp, scratch2) = scratch1.take_glwe_secret_exec(n, sk_out.rank());
+        let (mut sk_out_tmp, scratch2) = scratch1.take_glwe_secret_prepared(n, sk_out.rank());
         {
             let (mut tmp, _) = scratch2.take_scalar_znx(n, 1);
             (0..sk_out.rank()).for_each(|i| {

core/src/encryption/compressed/gglwe_tsk.rs

@@ -8,17 +8,17 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecret, TakeGLWESecretExec,
+    TakeGLWESecret, TakeGLWESecretPrepared,
-    layouts::{GGLWETensorKey, GLWESecret, Infos, compressed::GGLWETensorKeyCompressed},
+    layouts::{GGLWETensorKey, GLWESecret, Infos, compressed::GGLWETensorKeyCompressed, prepared::Prepare},
     trait_families::GLWEDecryptFamily,
 };
 
-use crate::trait_families::{GGLWETensorKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWETensorKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 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>,
+        Module<B>: GGLWETensorKeyEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
         GGLWETensorKey::encrypt_sk_scratch_space(module, n, basek, k, rank)
     }
@@ -34,8 +34,10 @@ impl<DataSelf: DataMut> GGLWETensorKeyCompressed<DataSelf> {
         sigma: f64,
         scratch: &mut Scratch<B>,
     ) where
-        Module<B>: GGLWETensorKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretExecModuleFamily<B>,
+        Module<B>:
-        Scratch<B>: ScratchAvailable + TakeVecZnxDft<B> + TakeVecZnxBig<B> + TakeGLWESecretExec<B> + TakeScalarZnx + TakeVecZnx,
+            GGLWETensorKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretPreparedModuleFamily<B>,
+        Scratch<B>:
+            ScratchAvailable + TakeVecZnxDft<B> + TakeVecZnxBig<B> + TakeGLWESecretPrepared<B> + TakeScalarZnx + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {
@@ -46,8 +48,8 @@ impl<DataSelf: DataMut> GGLWETensorKeyCompressed<DataSelf> {
         let n: usize = sk.n();
         let rank: usize = self.rank();
 
-        let (mut sk_dft_prep, scratch1) = scratch.take_glwe_secret_exec(n, rank);
+        let (mut sk_dft_prep, scratch1) = scratch.take_glwe_secret_prepared(n, rank);
-        sk_dft_prep.prepare(module, &sk);
+        sk_dft_prep.prepare(module, &sk, scratch1);
 
         let (mut sk_dft, scratch2) = scratch1.take_vec_znx_dft(n, rank, 1);
 

core/src/encryption/compressed/ggsw_ct.rs

@@ -7,7 +7,7 @@ use sampling::source::Source;
 use crate::{
     TakeGLWEPt,
     encryption::glwe_encrypt_sk_internal,
-    layouts::{GGSWCiphertext, Infos, compressed::GGSWCiphertextCompressed, prepared::GLWESecretExec},
+    layouts::{GGSWCiphertext, Infos, compressed::GGSWCiphertextCompressed, prepared::GLWESecretPrepared},
 };
 
 use crate::trait_families::GGSWEncryptSkFamily;
@@ -26,7 +26,7 @@ impl<DataSelf: DataMut> GGSWCiphertextCompressed<DataSelf> {
         &mut self,
         module: &Module<B>,
         pt: &ScalarZnx<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         seed_xa: [u8; 32],
         source_xe: &mut Source,
         sigma: f64,

core/src/encryption/compressed/glwe_ct.rs

@@ -6,7 +6,7 @@ use sampling::source::Source;
 
 use crate::{
     encryption::glwe_ct::glwe_encrypt_sk_internal,
-    layouts::{GLWECiphertext, GLWEPlaintext, Infos, compressed::GLWECiphertextCompressed, prepared::GLWESecretExec},
+    layouts::{GLWECiphertext, GLWEPlaintext, Infos, compressed::GLWECiphertextCompressed, prepared::GLWESecretPrepared},
 };
 
 use crate::trait_families::GLWEEncryptSkFamily;
@@ -25,7 +25,7 @@ impl<D: DataMut> GLWECiphertextCompressed<D> {
         &mut self,
         module: &Module<B>,
         pt: &GLWEPlaintext<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         seed_xa: [u8; 32],
         source_xe: &mut Source,
         sigma: f64,
@@ -49,7 +49,7 @@ impl<D: DataMut> GLWECiphertextCompressed<D> {
         &mut self,
         module: &Module<B>,
         pt: Option<(&GLWEPlaintext<DataPt>, usize)>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         seed_xa: [u8; 32],
         source_xe: &mut Source,
         sigma: f64,

core/src/encryption/gglwe_atk.rs

@@ -8,16 +8,16 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecret, TakeGLWESecretExec,
+    TakeGLWESecret, TakeGLWESecretPrepared,
-    layouts::{GGLWEAutomorphismKey, GLWESecret, GGLWESwitchingKey, Infos},
+    layouts::{GGLWEAutomorphismKey, GGLWESwitchingKey, GLWESecret, Infos},
 };
 
-use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 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>,
+        Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
         GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank, rank) + GLWESecret::bytes_of(n, rank)
     }
@@ -42,8 +42,8 @@ impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
             + VecZnxAutomorphism
             + VecZnxSwithcDegree
             + VecZnxAddScalarInplace
-            + GLWESecretExecModuleFamily<B>,
+            + GLWESecretPreparedModuleFamily<B>,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretPrepared<B> + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {

core/src/encryption/gglwe_ct.rs

@@ -9,7 +9,7 @@ use sampling::source::Source;
 
 use crate::{
     TakeGLWEPt,
-    layouts::{GGLWECiphertext, GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretExec},
+    layouts::{GGLWECiphertext, GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretPrepared},
 };
 
 use crate::trait_families::GGLWEEncryptSkFamily;
@@ -33,7 +33,7 @@ impl<DataSelf: DataMut> GGLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         pt: &ScalarZnx<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         source_xa: &mut Source,
         source_xe: &mut Source,
         sigma: f64,

core/src/encryption/gglwe_ksk.rs

@@ -5,11 +5,11 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecretExec,
+    TakeGLWESecretPrepared,
-    layouts::{GGLWECiphertext, GLWESecret, GGLWESwitchingKey, Infos, prepared::GLWESecretExec},
+    layouts::{GGLWECiphertext, GGLWESwitchingKey, GLWESecret, Infos, prepared::GLWESecretPrepared},
 };
 
-use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 impl GGLWESwitchingKey<Vec<u8>> {
     pub fn encrypt_sk_scratch_space<B: Backend>(
@@ -21,11 +21,11 @@ impl GGLWESwitchingKey<Vec<u8>> {
         rank_out: usize,
     ) -> usize
     where
-        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B> + GLWESecretExecModuleFamily<B>,
+        Module<B>: GGLWESwitchingKeyEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<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)
+            + GLWESecretPrepared::bytes_of(module, n, rank_out)
     }
 
     pub fn encrypt_pk_scratch_space<B: Backend>(
@@ -52,8 +52,9 @@ impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
         scratch: &mut Scratch<B>,
     ) where
         Module<B>:
-            GGLWESwitchingKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretExecModuleFamily<B>,
+            GGLWESwitchingKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretPreparedModuleFamily<B>,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + ScratchAvailable + TakeVecZnx,
+        Scratch<B>:
+            ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretPrepared<B> + ScratchAvailable + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {
@@ -94,7 +95,7 @@ impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
             );
         });
 
-        let (mut sk_out_tmp, scratch2) = scratch1.take_glwe_secret_exec(n, sk_out.rank());
+        let (mut sk_out_tmp, scratch2) = scratch1.take_glwe_secret_prepared(n, sk_out.rank());
         {
             let (mut tmp, _) = scratch2.take_scalar_znx(n, 1);
             (0..sk_out.rank()).for_each(|i| {

core/src/encryption/gglwe_tsk.rs

@@ -8,19 +8,22 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecret, TakeGLWESecretExec,
+    TakeGLWESecret, TakeGLWESecretPrepared,
-    layouts::{GGLWETensorKey, GLWESecret, GGLWESwitchingKey, Infos, prepared::GLWESecretExec},
+    layouts::{
+        GGLWESwitchingKey, GGLWETensorKey, GLWESecret, Infos,
+        prepared::{GLWESecretPrepared, Prepare},
+    },
     trait_families::GLWEDecryptFamily,
 };
 
-use crate::trait_families::{GGLWETensorKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWETensorKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 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>,
+        Module<B>: GGLWETensorKeyEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
-        GLWESecretExec::bytes_of(module, n, rank)
+        GLWESecretPrepared::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)
@@ -39,8 +42,10 @@ impl<DataSelf: DataMut> GGLWETensorKey<DataSelf> {
         sigma: f64,
         scratch: &mut Scratch<B>,
     ) where
-        Module<B>: GGLWETensorKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretExecModuleFamily<B>,
+        Module<B>:
-        Scratch<B>: ScratchAvailable + TakeVecZnxDft<B> + TakeVecZnxBig<B> + TakeGLWESecretExec<B> + TakeScalarZnx + TakeVecZnx,
+            GGLWETensorKeyEncryptSkFamily<B> + VecZnxSwithcDegree + VecZnxAddScalarInplace + GLWESecretPreparedModuleFamily<B>,
+        Scratch<B>:
+            ScratchAvailable + TakeVecZnxDft<B> + TakeVecZnxBig<B> + TakeGLWESecretPrepared<B> + TakeScalarZnx + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {
@@ -52,8 +57,8 @@ impl<DataSelf: DataMut> GGLWETensorKey<DataSelf> {
 
         let rank: usize = self.rank();
 
-        let (mut sk_dft_prep, scratch1) = scratch.take_glwe_secret_exec(n, rank);
+        let (mut sk_dft_prep, scratch1) = scratch.take_glwe_secret_prepared(n, rank);
-        sk_dft_prep.prepare(module, &sk);
+        sk_dft_prep.prepare(module, &sk, scratch1);
 
         let (mut sk_dft, scratch2) = scratch1.take_vec_znx_dft(n, rank, 1);
 

core/src/encryption/ggsw_ct.rs

@@ -6,7 +6,7 @@ use sampling::source::Source;
 
 use crate::{
     TakeGLWEPt,
-    layouts::{GGSWCiphertext, GLWECiphertext, Infos, prepared::GLWESecretExec},
+    layouts::{GGSWCiphertext, GLWECiphertext, Infos, prepared::GLWESecretPrepared},
 };
 
 use crate::trait_families::GLWEEncryptSkFamily;
@@ -31,7 +31,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         pt: &ScalarZnx<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         source_xa: &mut Source,
         source_xe: &mut Source,
         sigma: f64,

core/src/encryption/glwe_ct.rs

@@ -13,7 +13,7 @@ use crate::{
     dist::Distribution,
     layouts::{
         GLWECiphertext, GLWEPlaintext, Infos,
-        prepared::{GLWEPublicKeyExec, GLWESecretExec},
+        prepared::{GLWEPublicKeyPrepared, GLWESecretPrepared},
     },
     trait_families::{GLWEEncryptPkFamily, GLWEEncryptSkFamily},
 };
@@ -42,7 +42,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         pt: &GLWEPlaintext<DataPt>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         source_xa: &mut Source,
         source_xe: &mut Source,
         sigma: f64,
@@ -78,7 +78,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn encrypt_zero_sk<DataSk: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         source_xa: &mut Source,
         source_xe: &mut Source,
         sigma: f64,
@@ -113,7 +113,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         pt: Option<(&GLWEPlaintext<DataPt>, usize)>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         source_xa: &mut Source,
         source_xe: &mut Source,
         sigma: f64,
@@ -143,7 +143,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         pt: &GLWEPlaintext<DataPt>,
-        pk: &GLWEPublicKeyExec<DataPk, B>,
+        pk: &GLWEPublicKeyPrepared<DataPk, B>,
         source_xu: &mut Source,
         source_xe: &mut Source,
         sigma: f64,
@@ -166,7 +166,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn encrypt_zero_pk<DataPk: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        pk: &GLWEPublicKeyExec<DataPk, B>,
+        pk: &GLWEPublicKeyPrepared<DataPk, B>,
         source_xu: &mut Source,
         source_xe: &mut Source,
         sigma: f64,
@@ -190,7 +190,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         pt: Option<(&GLWEPlaintext<DataPt>, usize)>,
-        pk: &GLWEPublicKeyExec<DataPk, B>,
+        pk: &GLWEPublicKeyPrepared<DataPk, B>,
         source_xu: &mut Source,
         source_xe: &mut Source,
         sigma: f64,
@@ -283,7 +283,7 @@ pub(crate) fn glwe_encrypt_sk_internal<DataCt: DataMut, DataPt: DataRef, DataSk:
     cols: usize,
     compressed: bool,
     pt: Option<(&GLWEPlaintext<DataPt>, usize)>,
-    sk: &GLWESecretExec<DataSk, B>,
+    sk: &GLWESecretPrepared<DataSk, B>,
     source_xa: &mut Source,
     source_xe: &mut Source,
     sigma: f64,

core/src/encryption/glwe_pk.rs

@@ -7,7 +7,7 @@ use sampling::source::Source;
 
 use crate::{
     dist::Distribution,
-    layouts::{GLWECiphertext, GLWEPublicKey, Infos, prepared::GLWESecretExec},
+    layouts::{GLWECiphertext, GLWEPublicKey, Infos, prepared::GLWESecretPrepared},
 };
 
 use crate::trait_families::GLWEEncryptSkFamily;
@@ -16,7 +16,7 @@ impl<D: DataMut> GLWEPublicKey<D> {
     pub fn generate_from_sk<S: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        sk: &GLWESecretExec<S, B>,
+        sk: &GLWESecretPrepared<S, B>,
         source_xa: &mut Source,
         source_xe: &mut Source,
         sigma: f64,

core/src/encryption/glwe_to_lwe_ksk.rs

@@ -8,18 +8,18 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecret, TakeGLWESecretExec,
+    TakeGLWESecret, TakeGLWESecretPrepared,
-    layouts::{GLWESecret, GGLWESwitchingKey, GLWEToLWESwitchingKey, LWESecret, prepared::GLWESecretExec},
+    layouts::{GGLWESwitchingKey, GLWESecret, GLWEToLWESwitchingKey, LWESecret, prepared::GLWESecretPrepared},
 };
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 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>,
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
-        GLWESecretExec::bytes_of(module, n, rank_in)
+        GLWESecretPrepared::bytes_of(module, n, rank_in)
             + (GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank_in, 1) | GLWESecret::bytes_of(n, rank_in))
     }
 }
@@ -41,8 +41,8 @@ impl<D: DataMut> GLWEToLWESwitchingKey<D> {
             + VecZnxAutomorphismInplace
             + VecZnxSwithcDegree
             + VecZnxAddScalarInplace
-            + GLWESecretExecModuleFamily<B>,
+            + GLWESecretPreparedModuleFamily<B>,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretPrepared<B> + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {

core/src/encryption/lwe_ksk.rs

@@ -8,19 +8,19 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecret, TakeGLWESecretExec,
+    TakeGLWESecret, TakeGLWESecretPrepared,
-    layouts::{GLWESecret, GGLWESwitchingKey, Infos, LWESecret, LWESwitchingKey, prepared::GLWESecretExec},
+    layouts::{GGLWESwitchingKey, GLWESecret, Infos, LWESecret, LWESwitchingKey, prepared::GLWESecretPrepared},
 };
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 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>,
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
         GLWESecret::bytes_of(n, 1)
-            + GLWESecretExec::bytes_of(module, n, 1)
+            + GLWESecretPrepared::bytes_of(module, n, 1)
             + GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, 1, 1)
     }
 }
@@ -42,8 +42,8 @@ impl<D: DataMut> LWESwitchingKey<D> {
             + VecZnxAutomorphismInplace
             + VecZnxSwithcDegree
             + VecZnxAddScalarInplace
-            + GLWESecretExecModuleFamily<B>,
+            + GLWESecretPreparedModuleFamily<B>,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretPrepared<B> + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {

core/src/encryption/lwe_to_glwe_ksk.rs

@@ -8,16 +8,16 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    TakeGLWESecret, TakeGLWESecretExec,
+    TakeGLWESecret, TakeGLWESecretPrepared,
-    layouts::{GLWESecret, GGLWESwitchingKey, LWESecret, LWEToGLWESwitchingKey},
+    layouts::{GGLWESwitchingKey, GLWESecret, LWESecret, LWEToGLWESwitchingKey},
 };
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 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>,
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
         GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, 1, rank_out) + GLWESecret::bytes_of(n, 1)
     }
@@ -40,8 +40,8 @@ impl<D: DataMut> LWEToGLWESwitchingKey<D> {
             + VecZnxAutomorphismInplace
             + VecZnxSwithcDegree
             + VecZnxAddScalarInplace
-            + GLWESecretExecModuleFamily<B>,
+            + GLWESecretPreparedModuleFamily<B>,
-        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretExec<B> + TakeVecZnx,
+        Scratch<B>: ScratchAvailable + TakeScalarZnx + TakeVecZnxDft<B> + TakeGLWESecretPrepared<B> + TakeVecZnx,
     {
         #[cfg(debug_assertions)]
         {

core/src/external_product/gglwe_atk.rs

@@ -4,7 +4,7 @@ use backend::hal::{
 };
 
 use crate::{
-    layouts::{GGLWEAutomorphismKey, GGLWESwitchingKey, prepared::GGSWCiphertextExec},
+    layouts::{GGLWEAutomorphismKey, GGLWESwitchingKey, prepared::GGSWCiphertextPrepared},
     trait_families::GLWEExternalProductFamily,
 };
 
@@ -46,7 +46,7 @@ impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGLWEAutomorphismKey<DataLhs>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        rhs: &GGSWCiphertextPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEExternalProductFamily<B>,
@@ -58,7 +58,7 @@ impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
     pub fn external_product_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        rhs: &GGSWCiphertextPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEExternalProductFamily<B>,

core/src/external_product/gglwe_ksk.rs

@@ -4,7 +4,7 @@ use backend::hal::{
 };
 
 use crate::{
-    layouts::{GLWECiphertext, GGLWESwitchingKey, Infos, prepared::GGSWCiphertextExec},
+    layouts::{GGLWESwitchingKey, GLWECiphertext, Infos, prepared::GGSWCiphertextPrepared},
     trait_families::GLWEExternalProductFamily,
 };
 
@@ -46,7 +46,7 @@ impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGLWESwitchingKey<DataLhs>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        rhs: &GGSWCiphertextPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEExternalProductFamily<B>,
@@ -94,7 +94,7 @@ impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
     pub fn external_product_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        rhs: &GGSWCiphertextPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEExternalProductFamily<B>,

core/src/external_product/ggsw_ct.rs

@@ -4,7 +4,7 @@ use backend::hal::{
 };
 
 use crate::{
-    layouts::{GGSWCiphertext, GLWECiphertext, Infos, prepared::GGSWCiphertextExec},
+    layouts::{GGSWCiphertext, GLWECiphertext, Infos, prepared::GGSWCiphertextPrepared},
     trait_families::GLWEExternalProductFamily,
 };
 
@@ -46,7 +46,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        rhs: &GGSWCiphertextPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEExternalProductFamily<B>,
@@ -105,7 +105,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     pub fn external_product_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        rhs: &GGSWCiphertextPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEExternalProductFamily<B>,

core/src/external_product/glwe_ct.rs

@@ -7,7 +7,7 @@ use backend::hal::{
 };
 
 use crate::{
-    layouts::{GLWECiphertext, Infos, prepared::GGSWCiphertextExec},
+    layouts::{GLWECiphertext, Infos, prepared::GGSWCiphertextPrepared},
     trait_families::GLWEExternalProductFamily,
 };
 
@@ -64,7 +64,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        rhs: &GGSWCiphertextPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEExternalProductFamily<B>,
@@ -141,7 +141,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn external_product_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGSWCiphertextExec<DataRhs, B>,
+        rhs: &GGSWCiphertextPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEExternalProductFamily<B>,

core/src/glwe_packing.rs

@@ -7,7 +7,7 @@ use backend::hal::{
 
 use crate::{
     GLWEOperations, TakeGLWECt,
-    layouts::{GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyExec},
+    layouts::{GLWECiphertext, Infos, prepared::GGLWEAutomorphismKeyPrepared},
 };
 
 use crate::trait_families::{GLWEKeyswitchFamily, GLWEPackingFamily};
@@ -115,7 +115,7 @@ impl GLWEPacker {
         &mut self,
         module: &Module<B>,
         a: Option<&GLWECiphertext<DataA>>,
-        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
+        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyPrepared<DataAK, B>>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEPackingFamily<B>,
@@ -174,7 +174,7 @@ fn pack_core<D: DataRef, DataAK: DataRef, B: Backend>(
     a: Option<&GLWECiphertext<D>>,
     accumulators: &mut [Accumulator],
     i: usize,
-    auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
+    auto_keys: &HashMap<i64, GGLWEAutomorphismKeyPrepared<DataAK, B>>,
     scratch: &mut Scratch<B>,
 ) where
     Module<B>: GLWEPackingFamily<B>,
@@ -252,7 +252,7 @@ fn combine<D: DataRef, DataAK: DataRef, B: Backend>(
     acc: &mut Accumulator,
     b: Option<&GLWECiphertext<D>>,
     i: usize,
-    auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
+    auto_keys: &HashMap<i64, GGLWEAutomorphismKeyPrepared<DataAK, B>>,
     scratch: &mut Scratch<B>,
 ) where
     Module<B>: GLWEPackingFamily<B>,

core/src/glwe_trace.rs

@@ -3,7 +3,7 @@ use std::collections::HashMap;
 use backend::hal::layouts::{Backend, DataMut, DataRef, Module, Scratch};
 
 use crate::{
-    layouts::{GLWECiphertext, prepared::GGLWEAutomorphismKeyExec},
+    layouts::{GLWECiphertext, prepared::GGLWEAutomorphismKeyPrepared},
     operations::GLWEOperations,
 };
 
@@ -61,7 +61,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         start: usize,
         end: usize,
         lhs: &GLWECiphertext<DataLhs>,
-        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
+        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyPrepared<DataAK, B>>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWETraceModuleFamily<B>,
@@ -76,7 +76,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         module: &Module<B>,
         start: usize,
         end: usize,
-        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyExec<DataAK, B>>,
+        auto_keys: &HashMap<i64, GGLWEAutomorphismKeyPrepared<DataAK, B>>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWETraceModuleFamily<B>,

core/src/keyswitching/gglwe_ct.rs

@@ -5,8 +5,8 @@ use backend::hal::{
 
 use crate::{
     layouts::{
-        GGLWEAutomorphismKey, GLWECiphertext, GGLWESwitchingKey, Infos,
+        GGLWEAutomorphismKey, GGLWESwitchingKey, GLWECiphertext, Infos,
-        prepared::{GGLWEAutomorphismKeyExec, GGLWESwitchingKeyExec},
+        prepared::{GGLWEAutomorphismKeyPrepared, GGLWESwitchingKeyPrepared},
     },
     trait_families::GLWEKeyswitchFamily,
 };
@@ -49,7 +49,7 @@ impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGLWEAutomorphismKey<DataLhs>,
-        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -61,7 +61,7 @@ impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
     pub fn keyswitch_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGLWEAutomorphismKeyExec<DataRhs, B>,
+        rhs: &GGLWEAutomorphismKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -112,7 +112,7 @@ impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGLWESwitchingKey<DataLhs>,
-        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -160,7 +160,7 @@ impl<DataSelf: DataMut> GGLWESwitchingKey<DataSelf> {
     pub fn keyswitch_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,

core/src/keyswitching/ggsw_ct.rs

@@ -9,7 +9,7 @@ use backend::hal::{
 use crate::{
     layouts::{
         GGLWECiphertext, GGSWCiphertext, GLWECiphertext, Infos,
-        prepared::{GGLWESwitchingKeyExec, GGLWETensorKeyExec},
+        prepared::{GGLWESwitchingKeyPrepared, GGLWETensorKeyPrepared},
     },
     operations::GLWEOperations,
     trait_families::{GGSWKeySwitchFamily, GLWEKeyswitchFamily},
@@ -97,7 +97,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         a: &GGLWECiphertext<DataA>,
-        tsk: &GGLWETensorKeyExec<DataTsk, B>,
+        tsk: &GGLWETensorKeyPrepared<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         DataA: DataRef,
@@ -123,8 +123,8 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        ksk: &GGLWESwitchingKeyExec<DataKsk, B>,
+        ksk: &GGLWESwitchingKeyPrepared<DataKsk, B>,
-        tsk: &GGLWETensorKeyExec<DataTsk, B>,
+        tsk: &GGLWETensorKeyPrepared<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxNormalizeTmpBytes,
@@ -137,8 +137,8 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     pub fn keyswitch_inplace<DataKsk: DataRef, DataTsk: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        ksk: &GGLWESwitchingKeyExec<DataKsk, B>,
+        ksk: &GGLWESwitchingKeyPrepared<DataKsk, B>,
-        tsk: &GGLWETensorKeyExec<DataTsk, B>,
+        tsk: &GGLWETensorKeyPrepared<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxNormalizeTmpBytes,
@@ -153,7 +153,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
     pub fn expand_row<DataTsk: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        tsk: &GGLWETensorKeyExec<DataTsk, B>,
+        tsk: &GGLWETensorKeyPrepared<DataTsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GGSWKeySwitchFamily<B> + VecZnxNormalizeTmpBytes,
@@ -278,7 +278,7 @@ impl<DataSelf: DataMut> GGSWCiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GGSWCiphertext<DataLhs>,
-        ksk: &GGLWESwitchingKeyExec<DataKsk, B>,
+        ksk: &GGLWESwitchingKeyPrepared<DataKsk, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B> + GGSWKeySwitchFamily<B> + VecZnxNormalizeTmpBytes,

core/src/keyswitching/glwe_ct.rs

@@ -7,7 +7,7 @@ use backend::hal::{
 };
 
 use crate::{
-    layouts::{GLWECiphertext, Infos, prepared::GGLWESwitchingKeyExec},
+    layouts::{GLWECiphertext, Infos, prepared::GGLWESwitchingKeyPrepared},
     trait_families::GLWEKeyswitchFamily,
 };
 
@@ -65,7 +65,7 @@ impl<DataSelf: DataRef> GLWECiphertext<DataSelf> {
         &self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyPrepared<DataRhs, B>,
         scratch: &Scratch<B>,
     ) where
         DataLhs: DataRef,
@@ -136,7 +136,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
         &mut self,
         module: &Module<B>,
         lhs: &GLWECiphertext<DataLhs>,
-        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -156,7 +156,7 @@ impl<DataSelf: DataMut> GLWECiphertext<DataSelf> {
     pub fn keyswitch_inplace<DataRhs: DataRef, B: Backend>(
         &mut self,
         module: &Module<B>,
-        rhs: &GGLWESwitchingKeyExec<DataRhs, B>,
+        rhs: &GGLWESwitchingKeyPrepared<DataRhs, B>,
         scratch: &mut Scratch<B>,
     ) where
         Module<B>: GLWEKeyswitchFamily<B>,
@@ -174,7 +174,7 @@ impl<D: DataRef> GLWECiphertext<D> {
         &self,
         module: &Module<B>,
         res_dft: VecZnxDft<DataRes, B>,
-        rhs: &GGLWESwitchingKeyExec<DataKey, B>,
+        rhs: &GGLWESwitchingKeyPrepared<DataKey, B>,
         scratch: &mut Scratch<B>,
     ) -> VecZnxBig<DataRes, B>
     where

core/src/keyswitching/lwe_ct.rs

@@ -5,7 +5,7 @@ use backend::hal::{
 
 use crate::{
     TakeGLWECt,
-    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::LWESwitchingKeyExec},
+    layouts::{GLWECiphertext, Infos, LWECiphertext, prepared::LWESwitchingKeyPrepared},
 };
 
 use crate::trait_families::GLWEKeyswitchFamily;
@@ -32,7 +32,7 @@ impl<DLwe: DataMut> LWECiphertext<DLwe> {
         &mut self,
         module: &Module<B>,
         a: &LWECiphertext<A>,
-        ksk: &LWESwitchingKeyExec<DKs, B>,
+        ksk: &LWESwitchingKeyPrepared<DKs, B>,
         scratch: &mut Scratch<B>,
     ) where
         A: DataRef,

core/src/layouts/compressed/glwe_to_lwe_ksk.rs

@@ -7,7 +7,7 @@ use backend::hal::{
 
 use crate::layouts::{GLWEToLWESwitchingKey, Infos, compressed::GGLWESwitchingKeyCompressed};
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 #[derive(PartialEq, Eq, Clone)]
 pub struct GLWEToLWESwitchingKeyCompressed<D: Data>(pub(crate) GGLWESwitchingKeyCompressed<D>);
@@ -91,7 +91,7 @@ impl GLWEToLWESwitchingKeyCompressed<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>,
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
         GLWEToLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank_in)
     }

core/src/layouts/compressed/lwe_ksk.rs

@@ -6,7 +6,7 @@ use backend::hal::{
 use crate::layouts::{Infos, LWESwitchingKey, compressed::GGLWESwitchingKeyCompressed};
 use std::fmt;
 
-use crate::trait_families::{Decompress, GGLWEEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{Decompress, GGLWEEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 #[derive(PartialEq, Eq, Clone)]
 pub struct LWESwitchingKeyCompressed<D: Data>(pub(crate) GGLWESwitchingKeyCompressed<D>);
@@ -90,7 +90,7 @@ impl LWESwitchingKeyCompressed<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>,
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
         LWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k)
     }

core/src/layouts/compressed/lwe_to_glwe_ksk.rs

@@ -9,7 +9,7 @@ use crate::{
 };
 use std::fmt;
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 #[derive(PartialEq, Eq, Clone)]
 pub struct LWEToGLWESwitchingKeyCompressed<D: Data>(pub(crate) GGLWESwitchingKeyCompressed<D>);
@@ -93,7 +93,7 @@ impl LWEToGLWESwitchingKeyCompressed<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>,
+        Module<B>: GGLWEEncryptSkFamily<B> + GLWESecretPreparedModuleFamily<B>,
     {
         LWEToGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank_out)
     }

core/src/layouts/gglwe_atk.rs

@@ -3,7 +3,7 @@ use backend::hal::{
     layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
 };
 
-use crate::layouts::{GLWECiphertext, GGLWESwitchingKey, Infos};
+use crate::layouts::{GGLWESwitchingKey, GLWECiphertext, Infos};
 use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 
 use std::fmt;

core/src/layouts/glwe_pt.rs

@@ -1,3 +1,5 @@
+use std::fmt;
+
 use backend::hal::layouts::{Data, DataMut, DataRef, VecZnx, VecZnxToMut, VecZnxToRef};
 
 use crate::layouts::{GLWECiphertext, GLWECiphertextToMut, GLWECiphertextToRef, Infos, SetMetaData};
@@ -8,6 +10,18 @@ pub struct GLWEPlaintext<D: Data> {
     pub k: usize,
 }
 
+impl<D: DataRef> fmt::Display for GLWEPlaintext<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "GLWEPlaintext: basek={} k={}: {}",
+            self.basek(),
+            self.k(),
+            self.data
+        )
+    }
+}
+
 impl<D: Data> Infos for GLWEPlaintext<D> {
     type Inner = VecZnx<D>;
 

core/src/layouts/lwe_ct.rs

@@ -13,6 +13,18 @@ pub struct LWECiphertext<D: Data> {
     pub(crate) basek: usize,
 }
 
+impl<D: DataRef> LWECiphertext<D> {
+    pub fn data(&self) -> &VecZnx<D> {
+        &self.data
+    }
+}
+
+impl<D: DataMut> LWECiphertext<D> {
+    pub fn data_mut(&mut self) -> &VecZnx<D> {
+        &mut self.data
+    }
+}
+
 impl<D: DataRef> fmt::Debug for LWECiphertext<D> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "{}", self)
@@ -31,10 +43,7 @@ impl<D: DataRef> fmt::Display for LWECiphertext<D> {
     }
 }
 
-impl<D: DataMut> Reset for LWECiphertext<D>
+impl<D: DataMut> Reset for LWECiphertext<D> {
-where
-    VecZnx<D>: Reset,
-{
     fn reset(&mut self) {
         self.data.reset();
         self.basek = 0;

core/src/layouts/lwe_pt.rs

@@ -1,3 +1,5 @@
+use std::fmt;
+
 use backend::hal::layouts::{Data, DataMut, DataRef, VecZnx, VecZnxToMut, VecZnxToRef};
 
 use crate::layouts::{Infos, SetMetaData};
@@ -18,6 +20,18 @@ impl LWEPlaintext<Vec<u8>> {
     }
 }
 
+impl<D: DataRef> fmt::Display for LWEPlaintext<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "LWEPlaintext: basek={} k={}: {}",
+            self.basek(),
+            self.k(),
+            self.data
+        )
+    }
+}
+
 impl<D: Data> Infos for LWEPlaintext<D> {
     type Inner = VecZnx<D>;
 

core/src/layouts/lwe_sk.rs

@@ -1,6 +1,6 @@
 use backend::hal::{
-    api::{ZnxInfos, ZnxZero},
+    api::{ZnxInfos, ZnxView, ZnxZero},
-    layouts::{Data, DataMut, ScalarZnx},
+    layouts::{Data, DataMut, DataRef, ScalarZnx},
 };
 use sampling::source::Source;
 
@@ -20,6 +20,20 @@ impl LWESecret<Vec<u8>> {
     }
 }
 
+impl<D: DataRef> LWESecret<D> {
+    pub fn raw(&self) -> &[i64] {
+        self.data.at(0, 0)
+    }
+
+    pub fn dist(&self) -> Distribution {
+        self.dist
+    }
+
+    pub fn data(&self) -> &ScalarZnx<D> {
+        &self.data
+    }
+}
+
 impl<D: Data> LWESecret<D> {
     pub fn n(&self) -> usize {
         self.data.n()

core/src/layouts/prepared/gglwe_atk.rs

@@ -3,21 +3,24 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
 };
 
-use crate::layouts::{GGLWEAutomorphismKey, Infos, prepared::GGLWESwitchingKeyExec};
+use crate::layouts::{
+    GGLWEAutomorphismKey, Infos,
+    prepared::{GGLWESwitchingKeyPrepared, Prepare, PrepareAlloc},
+};
 
 #[derive(PartialEq, Eq)]
-pub struct GGLWEAutomorphismKeyExec<D: Data, B: Backend> {
+pub struct GGLWEAutomorphismKeyPrepared<D: Data, B: Backend> {
-    pub(crate) key: GGLWESwitchingKeyExec<D, B>,
+    pub(crate) key: GGLWESwitchingKeyPrepared<D, B>,
     pub(crate) p: i64,
 }
 
-impl<B: Backend> GGLWEAutomorphismKeyExec<Vec<u8>, B> {
+impl<B: Backend> GGLWEAutomorphismKeyPrepared<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>: VmpPMatAlloc<B>,
     {
-        GGLWEAutomorphismKeyExec::<Vec<u8>, B> {
+        GGLWEAutomorphismKeyPrepared::<Vec<u8>, B> {
-            key: GGLWESwitchingKeyExec::alloc(module, n, basek, k, rows, digits, rank, rank),
+            key: GGLWESwitchingKeyPrepared::alloc(module, n, basek, k, rows, digits, rank, rank),
             p: 0,
         }
     }
@@ -26,28 +29,11 @@ impl<B: Backend> GGLWEAutomorphismKeyExec<Vec<u8>, B> {
     where
         Module<B>: VmpPMatAllocBytes,
     {
-        GGLWESwitchingKeyExec::bytes_of(module, n, basek, k, rows, digits, rank, rank)
+        GGLWESwitchingKeyPrepared::bytes_of(module, n, basek, k, rows, digits, rank, rank)
-    }
-
-    pub fn from<DataOther: DataRef>(module: &Module<B>, other: &GGLWEAutomorphismKey<DataOther>, scratch: &mut Scratch<B>) -> Self
-    where
-        Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut atk_exec: GGLWEAutomorphismKeyExec<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: Data, B: Backend> Infos for GGLWEAutomorphismKeyExec<D, B> {
+impl<D: Data, B: Backend> Infos for GGLWEAutomorphismKeyPrepared<D, B> {
     type Inner = VmpPMat<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -63,7 +49,7 @@ impl<D: Data, B: Backend> Infos for GGLWEAutomorphismKeyExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> GGLWEAutomorphismKeyExec<D, B> {
+impl<D: Data, B: Backend> GGLWEAutomorphismKeyPrepared<D, B> {
     pub fn p(&self) -> i64 {
         self.p
     }
@@ -85,13 +71,31 @@ impl<D: Data, B: Backend> GGLWEAutomorphismKeyExec<D, B> {
     }
 }
 
-impl<D: DataMut, B: Backend> GGLWEAutomorphismKeyExec<D, B> {
+impl<D: DataMut, DR: DataRef, B: Backend> Prepare<B, GGLWEAutomorphismKey<DR>> for GGLWEAutomorphismKeyPrepared<D, B>
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GGLWEAutomorphismKey<DataOther>, scratch: &mut Scratch<B>)
+where
-    where
+    Module<B>: VmpPMatPrepare<B>,
-        DataOther: DataRef,
+{
-        Module<B>: VmpPMatPrepare<B>,
+    fn prepare(&mut self, module: &Module<B>, other: &GGLWEAutomorphismKey<DR>, scratch: &mut Scratch<B>) {
-    {
         self.key.prepare(module, &other.key, scratch);
         self.p = other.p;
     }
 }
+
+impl<D: DataRef, B: Backend> PrepareAlloc<B, GGLWEAutomorphismKeyPrepared<Vec<u8>, B>> for GGLWEAutomorphismKey<D>
+where
+    Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
+{
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> GGLWEAutomorphismKeyPrepared<Vec<u8>, B> {
+        let mut atk_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, B> = GGLWEAutomorphismKeyPrepared::alloc(
+            module,
+            self.n(),
+            self.basek(),
+            self.k(),
+            self.rows(),
+            self.digits(),
+            self.rank(),
+        );
+        atk_prepared.prepare(module, self, scratch);
+        atk_prepared
+    }
+}

core/src/layouts/prepared/gglwe_ct.rs

@@ -3,17 +3,20 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
 };
 
-use crate::layouts::{GGLWECiphertext, Infos};
+use crate::layouts::{
+    GGLWECiphertext, Infos,
+    prepared::{Prepare, PrepareAlloc},
+};
 
 #[derive(PartialEq, Eq)]
-pub struct GGLWECiphertextExec<D: Data, B: Backend> {
+pub struct GGLWECiphertextPrepared<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> {
+impl<B: Backend> GGLWECiphertextPrepared<Vec<u8>, B> {
     pub fn alloc(
         module: &Module<B>,
         n: usize,
@@ -84,7 +87,7 @@ impl<B: Backend> GGLWECiphertextExec<Vec<u8>, B> {
     }
 }
 
-impl<D: Data, B: Backend> Infos for GGLWECiphertextExec<D, B> {
+impl<D: Data, B: Backend> Infos for GGLWECiphertextPrepared<D, B> {
     type Inner = VmpPMat<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -100,7 +103,7 @@ impl<D: Data, B: Backend> Infos for GGLWECiphertextExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> GGLWECiphertextExec<D, B> {
+impl<D: Data, B: Backend> GGLWECiphertextPrepared<D, B> {
     pub fn rank(&self) -> usize {
         self.data.cols_out() - 1
     }
@@ -118,15 +121,34 @@ impl<D: Data, B: Backend> GGLWECiphertextExec<D, B> {
     }
 }
 
-impl<D: DataMut, B: Backend> GGLWECiphertextExec<D, B> {
+impl<D: DataMut, DR: DataRef, B: Backend> Prepare<B, GGLWECiphertext<DR>> for GGLWECiphertextPrepared<D, B>
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GGLWECiphertext<DataOther>, scratch: &mut Scratch<B>)
+where
-    where
+    Module<B>: VmpPMatPrepare<B>,
-        DataOther: DataRef,
+{
-        Module<B>: VmpPMatPrepare<B>,
+    fn prepare(&mut self, module: &Module<B>, other: &GGLWECiphertext<DR>, scratch: &mut Scratch<B>) {
-    {
         module.vmp_prepare(&mut self.data, &other.data, scratch);
         self.basek = other.basek;
         self.k = other.k;
         self.digits = other.digits;
     }
 }
+
+impl<D: DataRef, B: Backend> PrepareAlloc<B, GGLWECiphertextPrepared<Vec<u8>, B>> for GGLWECiphertext<D>
+where
+    Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
+{
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> GGLWECiphertextPrepared<Vec<u8>, B> {
+        let mut atk_prepared: GGLWECiphertextPrepared<Vec<u8>, B> = GGLWECiphertextPrepared::alloc(
+            module,
+            self.n(),
+            self.basek(),
+            self.k(),
+            self.rows(),
+            self.digits(),
+            self.rank_in(),
+            self.rank_out(),
+        );
+        atk_prepared.prepare(module, self, scratch);
+        atk_prepared
+    }
+}

core/src/layouts/prepared/gglwe_ksk.rs

@@ -3,16 +3,19 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
 };
 
-use crate::layouts::{GGLWESwitchingKey, Infos, prepared::GGLWECiphertextExec};
+use crate::layouts::{
+    GGLWESwitchingKey, Infos,
+    prepared::{GGLWECiphertextPrepared, Prepare, PrepareAlloc},
+};
 
 #[derive(PartialEq, Eq)]
-pub struct GGLWESwitchingKeyExec<D: Data, B: Backend> {
+pub struct GGLWESwitchingKeyPrepared<D: Data, B: Backend> {
-    pub(crate) key: GGLWECiphertextExec<D, B>,
+    pub(crate) key: GGLWECiphertextPrepared<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> GGLWESwitchingKeyExec<Vec<u8>, B> {
+impl<B: Backend> GGLWESwitchingKeyPrepared<Vec<u8>, B> {
     pub fn alloc(
         module: &Module<B>,
         n: usize,
@@ -26,8 +29,8 @@ impl<B: Backend> GGLWESwitchingKeyExec<Vec<u8>, B> {
     where
         Module<B>: VmpPMatAlloc<B>,
     {
-        GGLWESwitchingKeyExec::<Vec<u8>, B> {
+        GGLWESwitchingKeyPrepared::<Vec<u8>, B> {
-            key: GGLWECiphertextExec::alloc(module, n, basek, k, rows, digits, rank_in, rank_out),
+            key: GGLWECiphertextPrepared::alloc(module, n, basek, k, rows, digits, rank_in, rank_out),
             sk_in_n: 0,
             sk_out_n: 0,
         }
@@ -46,29 +49,11 @@ impl<B: Backend> GGLWESwitchingKeyExec<Vec<u8>, B> {
     where
         Module<B>: VmpPMatAllocBytes,
     {
-        GGLWECiphertextExec::bytes_of(module, n, basek, k, rows, digits, rank_in, rank_out)
+        GGLWECiphertextPrepared::bytes_of(module, n, basek, k, rows, digits, rank_in, rank_out)
-    }
-
-    pub fn from<DataOther: DataRef>(module: &Module<B>, other: &GGLWESwitchingKey<DataOther>, scratch: &mut Scratch<B>) -> Self
-    where
-        Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut ksk_exec: GGLWESwitchingKeyExec<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 GGLWESwitchingKeyExec<D, B> {
+impl<D: Data, B: Backend> Infos for GGLWESwitchingKeyPrepared<D, B> {
     type Inner = VmpPMat<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -84,7 +69,7 @@ impl<D: Data, B: Backend> Infos for GGLWESwitchingKeyExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> GGLWESwitchingKeyExec<D, B> {
+impl<D: Data, B: Backend> GGLWESwitchingKeyPrepared<D, B> {
     pub fn rank(&self) -> usize {
         self.key.data.cols_out() - 1
     }
@@ -110,14 +95,33 @@ impl<D: Data, B: Backend> GGLWESwitchingKeyExec<D, B> {
     }
 }
 
-impl<D: DataMut, B: Backend> GGLWESwitchingKeyExec<D, B> {
+impl<D: DataMut, DR: DataRef, B: Backend> Prepare<B, GGLWESwitchingKey<DR>> for GGLWESwitchingKeyPrepared<D, B>
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GGLWESwitchingKey<DataOther>, scratch: &mut Scratch<B>)
+where
-    where
+    Module<B>: VmpPMatPrepare<B>,
-        DataOther: DataRef,
+{
-        Module<B>: VmpPMatPrepare<B>,
+    fn prepare(&mut self, module: &Module<B>, other: &GGLWESwitchingKey<DR>, scratch: &mut Scratch<B>) {
-    {
         self.key.prepare(module, &other.key, scratch);
         self.sk_in_n = other.sk_in_n;
         self.sk_out_n = other.sk_out_n;
     }
 }
+
+impl<D: DataRef, B: Backend> PrepareAlloc<B, GGLWESwitchingKeyPrepared<Vec<u8>, B>> for GGLWESwitchingKey<D>
+where
+    Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
+{
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> GGLWESwitchingKeyPrepared<Vec<u8>, B> {
+        let mut atk_prepared: GGLWESwitchingKeyPrepared<Vec<u8>, B> = GGLWESwitchingKeyPrepared::alloc(
+            module,
+            self.n(),
+            self.basek(),
+            self.k(),
+            self.rows(),
+            self.digits(),
+            self.rank_in(),
+            self.rank_out(),
+        );
+        atk_prepared.prepare(module, self, scratch);
+        atk_prepared
+    }
+}

core/src/layouts/prepared/gglwe_tsk.rs

@@ -3,22 +3,25 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
 };
 
-use crate::layouts::{GGLWETensorKey, Infos, prepared::GGLWESwitchingKeyExec};
+use crate::layouts::{
+    GGLWETensorKey, Infos,
+    prepared::{GGLWESwitchingKeyPrepared, Prepare, PrepareAlloc},
+};
 
 #[derive(PartialEq, Eq)]
-pub struct GGLWETensorKeyExec<D: Data, B: Backend> {
+pub struct GGLWETensorKeyPrepared<D: Data, B: Backend> {
-    pub(crate) keys: Vec<GGLWESwitchingKeyExec<D, B>>,
+    pub(crate) keys: Vec<GGLWESwitchingKeyPrepared<D, B>>,
 }
 
-impl<B: Backend> GGLWETensorKeyExec<Vec<u8>, B> {
+impl<B: Backend> GGLWETensorKeyPrepared<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>: VmpPMatAlloc<B>,
     {
-        let mut keys: Vec<GGLWESwitchingKeyExec<Vec<u8>, B>> = Vec::new();
+        let mut keys: Vec<GGLWESwitchingKeyPrepared<Vec<u8>, B>> = Vec::new();
         let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
         (0..pairs).for_each(|_| {
-            keys.push(GGLWESwitchingKeyExec::alloc(
+            keys.push(GGLWESwitchingKeyPrepared::alloc(
                 module, n, basek, k, rows, digits, 1, rank,
             ));
         });
@@ -30,32 +33,11 @@ impl<B: Backend> GGLWETensorKeyExec<Vec<u8>, B> {
         Module<B>: VmpPMatAllocBytes,
     {
         let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
-        pairs * GGLWESwitchingKeyExec::bytes_of(module, n, basek, k, rows, digits, 1, rank)
+        pairs * GGLWESwitchingKeyPrepared::bytes_of(module, n, basek, k, rows, digits, 1, rank)
-    }
-
-    pub fn from<D: DataRef>(
-        module: &Module<B>,
-        other: &GGLWETensorKey<D>,
-        scratch: &mut Scratch<B>,
-    ) -> GGLWETensorKeyExec<Vec<u8>, B>
-    where
-        Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut tsk_exec: GGLWETensorKeyExec<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 GGLWETensorKeyExec<D, B> {
+impl<D: Data, B: Backend> Infos for GGLWETensorKeyPrepared<D, B> {
     type Inner = VmpPMat<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -71,7 +53,7 @@ impl<D: Data, B: Backend> Infos for GGLWETensorKeyExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> GGLWETensorKeyExec<D, B> {
+impl<D: Data, B: Backend> GGLWETensorKeyPrepared<D, B> {
     pub fn rank(&self) -> usize {
         self.keys[0].rank()
     }
@@ -89,9 +71,9 @@ impl<D: Data, B: Backend> GGLWETensorKeyExec<D, B> {
     }
 }
 
-impl<D: DataMut, B: Backend> GGLWETensorKeyExec<D, B> {
+impl<D: DataMut, B: Backend> GGLWETensorKeyPrepared<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 GGLWESwitchingKeyExec<D, B> {
+    pub fn at_mut(&mut self, mut i: usize, mut j: usize) -> &mut GGLWESwitchingKeyPrepared<D, B> {
         if i > j {
             std::mem::swap(&mut i, &mut j);
         };
@@ -100,9 +82,9 @@ impl<D: DataMut, B: Backend> GGLWETensorKeyExec<D, B> {
     }
 }
 
-impl<D: DataRef, B: Backend> GGLWETensorKeyExec<D, B> {
+impl<D: DataRef, B: Backend> GGLWETensorKeyPrepared<D, B> {
     // Returns a reference to GLWESwitchingKey_{s}(s[i] * s[j])
-    pub fn at(&self, mut i: usize, mut j: usize) -> &GGLWESwitchingKeyExec<D, B> {
+    pub fn at(&self, mut i: usize, mut j: usize) -> &GGLWESwitchingKeyPrepared<D, B> {
         if i > j {
             std::mem::swap(&mut i, &mut j);
         };
@@ -111,12 +93,11 @@ impl<D: DataRef, B: Backend> GGLWETensorKeyExec<D, B> {
     }
 }
 
-impl<D: DataMut, B: Backend> GGLWETensorKeyExec<D, B> {
+impl<D: DataMut, DR: DataRef, B: Backend> Prepare<B, GGLWETensorKey<DR>> for GGLWETensorKeyPrepared<D, B>
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GGLWETensorKey<DataOther>, scratch: &mut Scratch<B>)
+where
-    where
+    Module<B>: VmpPMatPrepare<B>,
-        DataOther: DataRef,
+{
-        Module<B>: VmpPMatPrepare<B>,
+    fn prepare(&mut self, module: &Module<B>, other: &GGLWETensorKey<DR>, scratch: &mut Scratch<B>) {
-    {
         #[cfg(debug_assertions)]
         {
             assert_eq!(self.keys.len(), other.keys.len());
@@ -129,3 +110,22 @@ impl<D: DataMut, B: Backend> GGLWETensorKeyExec<D, B> {
             });
     }
 }
+
+impl<D: DataRef, B: Backend> PrepareAlloc<B, GGLWETensorKeyPrepared<Vec<u8>, B>> for GGLWETensorKey<D>
+where
+    Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
+{
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> GGLWETensorKeyPrepared<Vec<u8>, B> {
+        let mut tsk_prepared: GGLWETensorKeyPrepared<Vec<u8>, B> = GGLWETensorKeyPrepared::alloc(
+            module,
+            self.n(),
+            self.basek(),
+            self.k(),
+            self.rows(),
+            self.digits(),
+            self.rank(),
+        );
+        tsk_prepared.prepare(module, self, scratch);
+        tsk_prepared
+    }
+}

core/src/layouts/prepared/ggsw_ct.rs

@@ -3,17 +3,20 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
 };
 
-use crate::layouts::{GGSWCiphertext, Infos};
+use crate::layouts::{
+    GGSWCiphertext, Infos,
+    prepared::{Prepare, PrepareAlloc},
+};
 
 #[derive(PartialEq, Eq)]
-pub struct GGSWCiphertextExec<D: Data, B: Backend> {
+pub struct GGSWCiphertextPrepared<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> GGSWCiphertextExec<Vec<u8>, B> {
+impl<B: Backend> GGSWCiphertextPrepared<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>: VmpPMatAlloc<B>,
@@ -66,30 +69,9 @@ impl<B: Backend> GGSWCiphertextExec<Vec<u8>, B> {
 
         module.vmp_pmat_alloc_bytes(n, rows, rank + 1, rank + 1, size)
     }
-
-    pub fn from<DataOther: DataRef>(
-        module: &Module<B>,
-        other: &GGSWCiphertext<DataOther>,
-        scratch: &mut Scratch<B>,
-    ) -> GGSWCiphertextExec<Vec<u8>, B>
-    where
-        Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut ggsw_exec: GGSWCiphertextExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.n(),
-            other.basek(),
-            other.k(),
-            other.rows(),
-            other.digits(),
-            other.rank(),
-        );
-        ggsw_exec.prepare(module, other, scratch);
-        ggsw_exec
-    }
 }
 
-impl<D: Data, B: Backend> Infos for GGSWCiphertextExec<D, B> {
+impl<D: Data, B: Backend> Infos for GGSWCiphertextPrepared<D, B> {
     type Inner = VmpPMat<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -105,7 +87,7 @@ impl<D: Data, B: Backend> Infos for GGSWCiphertextExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> GGSWCiphertextExec<D, B> {
+impl<D: Data, B: Backend> GGSWCiphertextPrepared<D, B> {
     pub fn rank(&self) -> usize {
         self.data.cols_out() - 1
     }
@@ -115,15 +97,39 @@ impl<D: Data, B: Backend> GGSWCiphertextExec<D, B> {
     }
 }
 
-impl<DataSelf: DataMut, B: Backend> GGSWCiphertextExec<DataSelf, B> {
+impl<D: DataRef, B: Backend> GGSWCiphertextPrepared<D, B> {
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GGSWCiphertext<DataOther>, scratch: &mut Scratch<B>)
+    pub fn data(&self) -> &VmpPMat<D, B> {
-    where
+        &self.data
-        DataOther: DataRef,
+    }
-        Module<B>: VmpPMatPrepare<B>,
+}
-    {
+
+impl<D: DataMut, DR: DataRef, B: Backend> Prepare<B, GGSWCiphertext<DR>> for GGSWCiphertextPrepared<D, B>
+where
+    Module<B>: VmpPMatPrepare<B>,
+{
+    fn prepare(&mut self, module: &Module<B>, other: &GGSWCiphertext<DR>, scratch: &mut Scratch<B>) {
         module.vmp_prepare(&mut self.data, &other.data, scratch);
         self.k = other.k;
         self.basek = other.basek;
         self.digits = other.digits;
     }
 }
+
+impl<D: DataRef, B: Backend> PrepareAlloc<B, GGSWCiphertextPrepared<Vec<u8>, B>> for GGSWCiphertext<D>
+where
+    Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
+{
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> GGSWCiphertextPrepared<Vec<u8>, B> {
+        let mut ggsw_prepared: GGSWCiphertextPrepared<Vec<u8>, B> = GGSWCiphertextPrepared::alloc(
+            module,
+            self.n(),
+            self.basek(),
+            self.k(),
+            self.rows(),
+            self.digits(),
+            self.rank(),
+        );
+        ggsw_prepared.prepare(module, self, scratch);
+        ggsw_prepared
+    }
+}

core/src/layouts/prepared/glwe_pk.rs

@@ -5,18 +5,21 @@ use backend::hal::{
 
 use crate::{
     dist::Distribution,
-    layouts::{GLWEPublicKey, Infos},
+    layouts::{
+        GLWEPublicKey, Infos,
+        prepared::{Prepare, PrepareAlloc},
+    },
 };
 
 #[derive(PartialEq, Eq)]
-pub struct GLWEPublicKeyExec<D: Data, B: Backend> {
+pub struct GLWEPublicKeyPrepared<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> {
+impl<D: Data, B: Backend> Infos for GLWEPublicKeyPrepared<D, B> {
     type Inner = VecZnxDft<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -32,13 +35,13 @@ impl<D: Data, B: Backend> Infos for GLWEPublicKeyExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> GLWEPublicKeyExec<D, B> {
+impl<D: Data, B: Backend> GLWEPublicKeyPrepared<D, B> {
     pub fn rank(&self) -> usize {
         self.cols() - 1
     }
 }
 
-impl<B: Backend> GLWEPublicKeyExec<Vec<u8>, B> {
+impl<B: Backend> GLWEPublicKeyPrepared<Vec<u8>, B> {
     pub fn alloc(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> Self
     where
         Module<B>: VecZnxDftAlloc<B>,
@@ -57,25 +60,25 @@ impl<B: Backend> GLWEPublicKeyExec<Vec<u8>, B> {
     {
         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
+impl<D: DataRef, B: Backend> PrepareAlloc<B, GLWEPublicKeyPrepared<Vec<u8>, B>> for GLWEPublicKey<D>
-    where
+where
-        DataOther: DataRef,
+    Module<B>: VecZnxDftAlloc<B> + VecZnxDftFromVecZnx<B>,
-        Module<B>: VecZnxDftAlloc<B> + VecZnxDftFromVecZnx<B>,
+{
-    {
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> GLWEPublicKeyPrepared<Vec<u8>, B> {
-        let mut pk_exec: GLWEPublicKeyExec<Vec<u8>, B> =
+        let mut pk_prepared: GLWEPublicKeyPrepared<Vec<u8>, B> =
-            GLWEPublicKeyExec::alloc(module, other.n(), other.basek(), other.k(), other.rank());
+            GLWEPublicKeyPrepared::alloc(module, self.n(), self.basek(), self.k(), self.rank());
-        pk_exec.prepare(module, other, scratch);
+        pk_prepared.prepare(module, self, scratch);
-        pk_exec
+        pk_prepared
     }
 }
 
-impl<D: DataMut, B: Backend> GLWEPublicKeyExec<D, B> {
+impl<DM: DataMut, DR: DataRef, B: Backend> Prepare<B, GLWEPublicKey<DR>> for GLWEPublicKeyPrepared<DM, B>
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GLWEPublicKey<DataOther>, _scratch: &mut Scratch<B>)
+where
-    where
+    Module<B>: VecZnxDftFromVecZnx<B>,
-        DataOther: DataRef,
+{
-        Module<B>: VecZnxDftFromVecZnx<B>,
+    fn prepare(&mut self, module: &Module<B>, other: &GLWEPublicKey<DR>, _scratch: &mut Scratch<B>) {
-    {
         #[cfg(debug_assertions)]
         {
             assert_eq!(self.n(), other.n());

core/src/layouts/prepared/glwe_sk.rs

@@ -3,17 +3,24 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, SvpPPol},
 };
 
-use crate::{dist::Distribution, layouts::GLWESecret, trait_families::GLWESecretExecModuleFamily};
+use crate::{
+    dist::Distribution,
+    layouts::{
+        GLWESecret,
+        prepared::{Prepare, PrepareAlloc},
+    },
+    trait_families::GLWESecretPreparedModuleFamily,
+};
 
-pub struct GLWESecretExec<D: Data, B: Backend> {
+pub struct GLWESecretPrepared<D: Data, B: Backend> {
     pub(crate) data: SvpPPol<D, B>,
     pub(crate) dist: Distribution,
 }
 
-impl<B: Backend> GLWESecretExec<Vec<u8>, B> {
+impl<B: Backend> GLWESecretPrepared<Vec<u8>, B> {
     pub fn alloc(module: &Module<B>, n: usize, rank: usize) -> Self
     where
-        Module<B>: GLWESecretExecModuleFamily<B>,
+        Module<B>: GLWESecretPreparedModuleFamily<B>,
     {
         Self {
             data: module.svp_ppol_alloc(n, rank),
@@ -23,25 +30,13 @@ impl<B: Backend> GLWESecretExec<Vec<u8>, B> {
 
     pub fn bytes_of(module: &Module<B>, n: usize, rank: usize) -> usize
     where
-        Module<B>: GLWESecretExecModuleFamily<B>,
+        Module<B>: GLWESecretPreparedModuleFamily<B>,
     {
         module.svp_ppol_alloc_bytes(n, rank)
     }
 }
 
-impl<B: Backend> GLWESecretExec<Vec<u8>, B> {
+impl<D: Data, B: Backend> GLWESecretPrepared<D, B> {
-    pub fn from<D>(module: &Module<B>, sk: &GLWESecret<D>) -> Self
-    where
-        D: DataRef,
-        Module<B>: GLWESecretExecModuleFamily<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()
     }
@@ -55,15 +50,29 @@ impl<D: Data, B: Backend> GLWESecretExec<D, B> {
     }
 }
 
-impl<D: DataMut, B: Backend> GLWESecretExec<D, B> {
+impl<D: DataRef, B: Backend> PrepareAlloc<B, GLWESecretPrepared<Vec<u8>, B>> for GLWESecret<D>
-    pub(crate) fn prepare<O>(&mut self, module: &Module<B>, sk: &GLWESecret<O>)
+where
-    where
+    Module<B>: SvpPrepare<B> + SvpPPolAllocBytes + SvpPPolAlloc<B>,
-        O: DataRef,
+{
-        Module<B>: GLWESecretExecModuleFamily<B>,
+    fn prepare_alloc(
-    {
+        &self,
-        (0..self.rank()).for_each(|i| {
+        module: &Module<B>,
-            module.svp_prepare(&mut self.data, i, &sk.data, i);
+        scratch: &mut backend::hal::layouts::Scratch<B>,
-        });
+    ) -> GLWESecretPrepared<Vec<u8>, B> {
-        self.dist = sk.dist
+        let mut sk_dft: GLWESecretPrepared<Vec<u8>, B> = GLWESecretPrepared::alloc(module, self.n(), self.rank());
+        sk_dft.prepare(module, self, scratch);
+        sk_dft
+    }
+}
+
+impl<DM: DataMut, DR: DataRef, B: Backend> Prepare<B, GLWESecret<DR>> for GLWESecretPrepared<DM, B>
+where
+    Module<B>: SvpPrepare<B>,
+{
+    fn prepare(&mut self, module: &Module<B>, other: &GLWESecret<DR>, _scratch: &mut backend::hal::layouts::Scratch<B>) {
+        (0..self.rank()).for_each(|i| {
+            module.svp_prepare(&mut self.data, i, &other.data, i);
+        });
+        self.dist = other.dist
     }
 }

core/src/layouts/prepared/glwe_to_lwe_ksk.rs

@@ -3,12 +3,15 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
 };
 
-use crate::layouts::{GLWEToLWESwitchingKey, Infos, prepared::GGLWESwitchingKeyExec};
+use crate::layouts::{
+    GLWEToLWESwitchingKey, Infos,
+    prepared::{GGLWESwitchingKeyPrepared, Prepare, PrepareAlloc},
+};
 
 #[derive(PartialEq, Eq)]
-pub struct GLWEToLWESwitchingKeyExec<D: Data, B: Backend>(pub(crate) GGLWESwitchingKeyExec<D, B>);
+pub struct GLWEToLWESwitchingKeyPrepared<D: Data, B: Backend>(pub(crate) GGLWESwitchingKeyPrepared<D, B>);
 
-impl<D: Data, B: Backend> Infos for GLWEToLWESwitchingKeyExec<D, B> {
+impl<D: Data, B: Backend> Infos for GLWEToLWESwitchingKeyPrepared<D, B> {
     type Inner = VmpPMat<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -24,7 +27,7 @@ impl<D: Data, B: Backend> Infos for GLWEToLWESwitchingKeyExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> GLWEToLWESwitchingKeyExec<D, B> {
+impl<D: Data, B: Backend> GLWEToLWESwitchingKeyPrepared<D, B> {
     pub fn digits(&self) -> usize {
         self.0.digits()
     }
@@ -42,12 +45,12 @@ impl<D: Data, B: Backend> GLWEToLWESwitchingKeyExec<D, B> {
     }
 }
 
-impl<B: Backend> GLWEToLWESwitchingKeyExec<Vec<u8>, B> {
+impl<B: Backend> GLWEToLWESwitchingKeyPrepared<Vec<u8>, B> {
     pub fn alloc(module: &Module<B>, n: usize, basek: usize, k: usize, rows: usize, rank_in: usize) -> Self
     where
         Module<B>: VmpPMatAlloc<B>,
     {
-        Self(GGLWESwitchingKeyExec::alloc(
+        Self(GGLWESwitchingKeyPrepared::alloc(
             module, n, basek, k, rows, 1, rank_in, 1,
         ))
     }
@@ -56,36 +59,33 @@ impl<B: Backend> GLWEToLWESwitchingKeyExec<Vec<u8>, B> {
     where
         Module<B>: VmpPMatAllocBytes,
     {
-        GGLWESwitchingKeyExec::<Vec<u8>, B>::bytes_of(module, n, basek, k, rows, digits, rank_in, 1)
+        GGLWESwitchingKeyPrepared::<Vec<u8>, B>::bytes_of(module, n, basek, k, rows, digits, rank_in, 1)
-    }
-
-    pub fn from<DataOther: DataRef>(
-        module: &Module<B>,
-        other: &GLWEToLWESwitchingKey<DataOther>,
-        scratch: &mut Scratch<B>,
-    ) -> Self
-    where
-        Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut ksk_exec: GLWEToLWESwitchingKeyExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.0.n(),
-            other.0.basek(),
-            other.0.k(),
-            other.0.rows(),
-            other.0.rank_in(),
-        );
-        ksk_exec.prepare(module, other, scratch);
-        ksk_exec
     }
 }
 
-impl<D: DataMut, B: Backend> GLWEToLWESwitchingKeyExec<D, B> {
+impl<D: DataRef, B: Backend> PrepareAlloc<B, GLWEToLWESwitchingKeyPrepared<Vec<u8>, B>> for GLWEToLWESwitchingKey<D>
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &GLWEToLWESwitchingKey<DataOther>, scratch: &mut Scratch<B>)
+where
-    where
+    Module<B>: VmpPMatPrepare<B> + VmpPMatAlloc<B>,
-        DataOther: DataRef,
+{
-        Module<B>: VmpPMatPrepare<B>,
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> GLWEToLWESwitchingKeyPrepared<Vec<u8>, B> {
-    {
+        let mut ksk_prepared: GLWEToLWESwitchingKeyPrepared<Vec<u8>, B> = GLWEToLWESwitchingKeyPrepared::alloc(
+            module,
+            self.0.n(),
+            self.0.basek(),
+            self.0.k(),
+            self.0.rows(),
+            self.0.rank_in(),
+        );
+        ksk_prepared.prepare(module, self, scratch);
+        ksk_prepared
+    }
+}
+
+impl<DM: DataMut, DR: DataRef, B: Backend> Prepare<B, GLWEToLWESwitchingKey<DR>> for GLWEToLWESwitchingKeyPrepared<DM, B>
+where
+    Module<B>: VmpPMatPrepare<B>,
+{
+    fn prepare(&mut self, module: &Module<B>, other: &GLWEToLWESwitchingKey<DR>, scratch: &mut Scratch<B>) {
         self.0.prepare(module, &other.0, scratch);
     }
 }

core/src/layouts/prepared/lwe_ksk.rs

@@ -3,12 +3,15 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
 };
 
-use crate::layouts::{Infos, LWESwitchingKey, prepared::GGLWESwitchingKeyExec};
+use crate::layouts::{
+    Infos, LWESwitchingKey,
+    prepared::{GGLWESwitchingKeyPrepared, Prepare, PrepareAlloc},
+};
 
 #[derive(PartialEq, Eq)]
-pub struct LWESwitchingKeyExec<D: Data, B: Backend>(pub(crate) GGLWESwitchingKeyExec<D, B>);
+pub struct LWESwitchingKeyPrepared<D: Data, B: Backend>(pub(crate) GGLWESwitchingKeyPrepared<D, B>);
 
-impl<D: Data, B: Backend> Infos for LWESwitchingKeyExec<D, B> {
+impl<D: Data, B: Backend> Infos for LWESwitchingKeyPrepared<D, B> {
     type Inner = VmpPMat<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -24,7 +27,7 @@ impl<D: Data, B: Backend> Infos for LWESwitchingKeyExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> LWESwitchingKeyExec<D, B> {
+impl<D: Data, B: Backend> LWESwitchingKeyPrepared<D, B> {
     pub fn digits(&self) -> usize {
         self.0.digits()
     }
@@ -42,12 +45,12 @@ impl<D: Data, B: Backend> LWESwitchingKeyExec<D, B> {
     }
 }
 
-impl<B: Backend> LWESwitchingKeyExec<Vec<u8>, B> {
+impl<B: Backend> LWESwitchingKeyPrepared<Vec<u8>, B> {
     pub fn alloc(module: &Module<B>, n: usize, basek: usize, k: usize, rows: usize) -> Self
     where
         Module<B>: VmpPMatAlloc<B>,
     {
-        Self(GGLWESwitchingKeyExec::alloc(
+        Self(GGLWESwitchingKeyPrepared::alloc(
             module, n, basek, k, rows, 1, 1, 1,
         ))
     }
@@ -56,31 +59,32 @@ impl<B: Backend> LWESwitchingKeyExec<Vec<u8>, B> {
     where
         Module<B>: VmpPMatAllocBytes,
     {
-        GGLWESwitchingKeyExec::<Vec<u8>, B>::bytes_of(module, n, basek, k, rows, digits, 1, 1)
+        GGLWESwitchingKeyPrepared::<Vec<u8>, B>::bytes_of(module, n, basek, k, rows, digits, 1, 1)
-    }
-
-    pub fn from<DataOther: DataRef>(module: &Module<B>, other: &LWESwitchingKey<DataOther>, scratch: &mut Scratch<B>) -> Self
-    where
-        Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut ksk_exec: LWESwitchingKeyExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.0.n(),
-            other.0.basek(),
-            other.0.k(),
-            other.0.rows(),
-        );
-        ksk_exec.prepare(module, other, scratch);
-        ksk_exec
     }
 }
 
-impl<D: DataMut, B: Backend> LWESwitchingKeyExec<D, B> {
+impl<D: DataRef, B: Backend> PrepareAlloc<B, LWESwitchingKeyPrepared<Vec<u8>, B>> for LWESwitchingKey<D>
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &LWESwitchingKey<DataOther>, scratch: &mut Scratch<B>)
+where
-    where
+    Module<B>: VmpPMatPrepare<B> + VmpPMatAlloc<B>,
-        DataOther: DataRef,
+{
-        Module<B>: VmpPMatPrepare<B>,
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> LWESwitchingKeyPrepared<Vec<u8>, B> {
-    {
+        let mut ksk_prepared: LWESwitchingKeyPrepared<Vec<u8>, B> = LWESwitchingKeyPrepared::alloc(
+            module,
+            self.0.n(),
+            self.0.basek(),
+            self.0.k(),
+            self.0.rows(),
+        );
+        ksk_prepared.prepare(module, self, scratch);
+        ksk_prepared
+    }
+}
+
+impl<DM: DataMut, DR: DataRef, B: Backend> Prepare<B, LWESwitchingKey<DR>> for LWESwitchingKeyPrepared<DM, B>
+where
+    Module<B>: VmpPMatPrepare<B>,
+{
+    fn prepare(&mut self, module: &Module<B>, other: &LWESwitchingKey<DR>, scratch: &mut Scratch<B>) {
         self.0.prepare(module, &other.0, scratch);
     }
 }

core/src/layouts/prepared/lwe_to_glwe_ksk.rs

@@ -3,13 +3,16 @@ use backend::hal::{
     layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
 };
 
-use crate::layouts::{Infos, LWEToGLWESwitchingKey, prepared::GGLWESwitchingKeyExec};
+use crate::layouts::{
+    Infos, LWEToGLWESwitchingKey,
+    prepared::{GGLWESwitchingKeyPrepared, Prepare, PrepareAlloc},
+};
 
 /// A special [GLWESwitchingKey] required to for the conversion from [LWECiphertext] to [GLWECiphertext].
 #[derive(PartialEq, Eq)]
-pub struct LWEToGLWESwitchingKeyExec<D: Data, B: Backend>(pub(crate) GGLWESwitchingKeyExec<D, B>);
+pub struct LWEToGLWESwitchingKeyPrepared<D: Data, B: Backend>(pub(crate) GGLWESwitchingKeyPrepared<D, B>);
 
-impl<D: Data, B: Backend> Infos for LWEToGLWESwitchingKeyExec<D, B> {
+impl<D: Data, B: Backend> Infos for LWEToGLWESwitchingKeyPrepared<D, B> {
     type Inner = VmpPMat<D, B>;
 
     fn inner(&self) -> &Self::Inner {
@@ -25,7 +28,7 @@ impl<D: Data, B: Backend> Infos for LWEToGLWESwitchingKeyExec<D, B> {
     }
 }
 
-impl<D: Data, B: Backend> LWEToGLWESwitchingKeyExec<D, B> {
+impl<D: Data, B: Backend> LWEToGLWESwitchingKeyPrepared<D, B> {
     pub fn digits(&self) -> usize {
         self.0.digits()
     }
@@ -43,12 +46,12 @@ impl<D: Data, B: Backend> LWEToGLWESwitchingKeyExec<D, B> {
     }
 }
 
-impl<B: Backend> LWEToGLWESwitchingKeyExec<Vec<u8>, B> {
+impl<B: Backend> LWEToGLWESwitchingKeyPrepared<Vec<u8>, B> {
     pub fn alloc(module: &Module<B>, n: usize, basek: usize, k: usize, rows: usize, rank_out: usize) -> Self
     where
         Module<B>: VmpPMatAlloc<B>,
     {
-        Self(GGLWESwitchingKeyExec::alloc(
+        Self(GGLWESwitchingKeyPrepared::alloc(
             module, n, basek, k, rows, 1, 1, rank_out,
         ))
     }
@@ -57,36 +60,33 @@ impl<B: Backend> LWEToGLWESwitchingKeyExec<Vec<u8>, B> {
     where
         Module<B>: VmpPMatAllocBytes,
     {
-        GGLWESwitchingKeyExec::<Vec<u8>, B>::bytes_of(module, n, basek, k, rows, digits, 1, rank_out)
+        GGLWESwitchingKeyPrepared::<Vec<u8>, B>::bytes_of(module, n, basek, k, rows, digits, 1, rank_out)
-    }
-
-    pub fn from<DataOther: DataRef>(
-        module: &Module<B>,
-        other: &LWEToGLWESwitchingKey<DataOther>,
-        scratch: &mut Scratch<B>,
-    ) -> Self
-    where
-        Module<B>: VmpPMatAlloc<B> + VmpPMatPrepare<B>,
-    {
-        let mut ksk_exec: LWEToGLWESwitchingKeyExec<Vec<u8>, B> = Self::alloc(
-            module,
-            other.0.n(),
-            other.0.basek(),
-            other.0.k(),
-            other.0.rows(),
-            other.0.rank(),
-        );
-        ksk_exec.prepare(module, other, scratch);
-        ksk_exec
     }
 }
 
-impl<D: DataMut, B: Backend> LWEToGLWESwitchingKeyExec<D, B> {
+impl<D: DataRef, B: Backend> PrepareAlloc<B, LWEToGLWESwitchingKeyPrepared<Vec<u8>, B>> for LWEToGLWESwitchingKey<D>
-    pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &LWEToGLWESwitchingKey<DataOther>, scratch: &mut Scratch<B>)
+where
-    where
+    Module<B>: VmpPMatPrepare<B> + VmpPMatAlloc<B>,
-        DataOther: DataRef,
+{
-        Module<B>: VmpPMatPrepare<B>,
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> LWEToGLWESwitchingKeyPrepared<Vec<u8>, B> {
-    {
+        let mut ksk_prepared: LWEToGLWESwitchingKeyPrepared<Vec<u8>, B> = LWEToGLWESwitchingKeyPrepared::alloc(
+            module,
+            self.0.n(),
+            self.0.basek(),
+            self.0.k(),
+            self.0.rows(),
+            self.0.rank_out(),
+        );
+        ksk_prepared.prepare(module, self, scratch);
+        ksk_prepared
+    }
+}
+
+impl<DM: DataMut, DR: DataRef, B: Backend> Prepare<B, LWEToGLWESwitchingKey<DR>> for LWEToGLWESwitchingKeyPrepared<DM, B>
+where
+    Module<B>: VmpPMatPrepare<B>,
+{
+    fn prepare(&mut self, module: &Module<B>, other: &LWEToGLWESwitchingKey<DR>, scratch: &mut Scratch<B>) {
         self.0.prepare(module, &other.0, scratch);
     }
 }

core/src/layouts/prepared/mod.rs

@@ -9,6 +9,7 @@ mod glwe_to_lwe_ksk;
 mod lwe_ksk;
 mod lwe_to_glwe_ksk;
 
+use backend::hal::layouts::{Backend, Module, Scratch};
 pub use gglwe_atk::*;
 pub use gglwe_ct::*;
 pub use gglwe_ksk::*;
@@ -19,3 +20,11 @@ pub use glwe_sk::*;
 pub use glwe_to_lwe_ksk::*;
 pub use lwe_ksk::*;
 pub use lwe_to_glwe_ksk::*;
+
+pub trait PrepareAlloc<B: Backend, T> {
+    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> T;
+}
+
+pub trait Prepare<B: Backend, T> {
+    fn prepare(&mut self, module: &Module<B>, other: &T, scratch: &mut Scratch<B>);
+}

core/src/lib.rs

@@ -11,10 +11,12 @@ mod keyswitching;
 mod noise;
 mod operations;
 mod scratch;
+mod utils;
 
 pub use operations::*;
 pub mod layouts;
 pub mod trait_families;
+pub use dist::*;
 pub use glwe_packing::*;
 
 pub use scratch::*;

core/src/noise/gglwe_ct.rs

@@ -1,11 +1,11 @@
 use backend::hal::{
-    api::{ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxStd, VecZnxSubScalarInplace, ZnxZero},
+    api::{ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxSubScalarInplace, ZnxZero},
     layouts::{Backend, DataRef, Module, ScalarZnx, ScratchOwned},
     oep::{ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeVecZnxBigImpl, TakeVecZnxDftImpl},
 };
 
 use crate::{
-    layouts::{GGLWECiphertext, GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretExec},
+    layouts::{GGLWECiphertext, GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretPrepared},
     trait_families::GLWEDecryptFamily,
 };
 
@@ -13,13 +13,13 @@ impl<D: DataRef> GGLWECiphertext<D> {
     pub fn assert_noise<B: Backend, DataSk, DataWant>(
         self,
         module: &Module<B>,
-        sk: &GLWESecretExec<DataSk, B>,
+        sk: &GLWESecretPrepared<DataSk, B>,
         pt_want: &ScalarZnx<DataWant>,
         max_noise: f64,
     ) where
         DataSk: DataRef,
         DataWant: DataRef,
-        Module<B>: GLWEDecryptFamily<B> + VecZnxStd + VecZnxSubScalarInplace,
+        Module<B>: GLWEDecryptFamily<B> + VecZnxSubScalarInplace,
         B: TakeVecZnxDftImpl<B> + TakeVecZnxBigImpl<B> + ScratchOwnedAllocImpl<B> + ScratchOwnedBorrowImpl<B>,
     {
         let digits: usize = self.digits();
@@ -47,7 +47,7 @@ impl<D: DataRef> GGLWECiphertext<D> {
                     col_i,
                 );
 
-                let noise_have: f64 = module.vec_znx_std(basek, &pt.data, 0).log2();
+                let noise_have: f64 = pt.data.std(basek, 0).log2();
 
                 assert!(
                     noise_have <= max_noise,

core/src/noise/ggsw_ct.rs

@@ -1,14 +1,14 @@
 use backend::hal::{
     api::{
         ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxBigAlloc, VecZnxBigNormalize, VecZnxDftAlloc,
-        VecZnxDftToVecZnxBigTmpA, VecZnxNormalizeTmpBytes, VecZnxStd, VecZnxSubABInplace, ZnxZero,
+        VecZnxDftToVecZnxBigTmpA, VecZnxNormalizeTmpBytes, VecZnxSubABInplace, ZnxZero,
     },
     layouts::{Backend, DataRef, Module, ScalarZnx, ScratchOwned, VecZnxBig, VecZnxDft},
     oep::{ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeVecZnxBigImpl, TakeVecZnxDftImpl},
 };
 
 use crate::{
-    layouts::{GGSWCiphertext, GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretExec},
+    layouts::{GGSWCiphertext, GLWECiphertext, GLWEPlaintext, Infos, prepared::GLWESecretPrepared},
     trait_families::GGSWAssertNoiseFamily,
 };
 
@@ -16,13 +16,13 @@ impl<D: DataRef> GGSWCiphertext<D> {
     pub fn assert_noise<B: Backend, DataSk, DataScalar, F>(
         &self,
         module: &Module<B>,
-        sk_exec: &GLWESecretExec<DataSk, B>,
+        sk_prepared: &GLWESecretPrepared<DataSk, B>,
         pt_want: &ScalarZnx<DataScalar>,
         max_noise: F,
     ) where
         DataSk: DataRef,
         DataScalar: DataRef,
-        Module<B>: GGSWAssertNoiseFamily<B> + VecZnxAddScalarInplace + VecZnxSubABInplace + VecZnxStd,
+        Module<B>: GGSWAssertNoiseFamily<B> + VecZnxAddScalarInplace + VecZnxSubABInplace,
         B: TakeVecZnxDftImpl<B> + TakeVecZnxBigImpl<B> + ScratchOwnedAllocImpl<B> + ScratchOwnedBorrowImpl<B>,
         F: Fn(usize) -> f64,
     {
@@ -46,17 +46,17 @@ impl<D: DataRef> GGSWCiphertext<D> {
                 // mul with sk[col_j-1]
                 if col_j > 0 {
                     module.vec_znx_dft_from_vec_znx(1, 0, &mut pt_dft, 0, &pt.data, 0);
-                    module.svp_apply_inplace(&mut pt_dft, 0, &sk_exec.data, col_j - 1);
+                    module.svp_apply_inplace(&mut pt_dft, 0, &sk_prepared.data, col_j - 1);
                     module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut pt_big, 0, &mut pt_dft, 0);
                     module.vec_znx_big_normalize(basek, &mut pt.data, 0, &pt_big, 0, scratch.borrow());
                 }
 
                 self.at(row_i, col_j)
-                    .decrypt(module, &mut pt_have, &sk_exec, scratch.borrow());
+                    .decrypt(module, &mut pt_have, &sk_prepared, scratch.borrow());
 
                 module.vec_znx_sub_ab_inplace(&mut pt_have.data, 0, &pt.data, 0);
 
-                let std_pt: f64 = module.vec_znx_std(basek, &pt_have.data, 0).log2();
+                let std_pt: f64 = pt_have.data.std(basek, 0).log2();
                 let noise: f64 = max_noise(col_j);
                 println!("{} {}", std_pt, noise);
                 assert!(std_pt <= noise, "{} > {}", std_pt, noise);
@@ -71,12 +71,12 @@ impl<D: DataRef> GGSWCiphertext<D> {
     pub fn print_noise<B: Backend, DataSk, DataScalar>(
         &self,
         module: &Module<B>,
-        sk_exec: &GLWESecretExec<DataSk, B>,
+        sk_prepared: &GLWESecretPrepared<DataSk, B>,
         pt_want: &ScalarZnx<DataScalar>,
     ) where
         DataSk: DataRef,
         DataScalar: DataRef,
-        Module<B>: GGSWAssertNoiseFamily<B> + VecZnxAddScalarInplace + VecZnxSubABInplace + VecZnxStd,
+        Module<B>: GGSWAssertNoiseFamily<B> + VecZnxAddScalarInplace + VecZnxSubABInplace,
         B: TakeVecZnxDftImpl<B> + TakeVecZnxBigImpl<B> + ScratchOwnedAllocImpl<B> + ScratchOwnedBorrowImpl<B>,
     {
         let basek: usize = self.basek();
@@ -99,17 +99,17 @@ impl<D: DataRef> GGSWCiphertext<D> {
                 // mul with sk[col_j-1]
                 if col_j > 0 {
                     module.vec_znx_dft_from_vec_znx(1, 0, &mut pt_dft, 0, &pt.data, 0);
-                    module.svp_apply_inplace(&mut pt_dft, 0, &sk_exec.data, col_j - 1);
+                    module.svp_apply_inplace(&mut pt_dft, 0, &sk_prepared.data, col_j - 1);
                     module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut pt_big, 0, &mut pt_dft, 0);
                     module.vec_znx_big_normalize(basek, &mut pt.data, 0, &pt_big, 0, scratch.borrow());
                 }
 
                 self.at(row_i, col_j)
-                    .decrypt(module, &mut pt_have, &sk_exec, scratch.borrow());
+                    .decrypt(module, &mut pt_have, &sk_prepared, scratch.borrow());
 
                 module.vec_znx_sub_ab_inplace(&mut pt_have.data, 0, &pt.data, 0);
 
-                let std_pt: f64 = module.vec_znx_std(basek, &pt_have.data, 0).log2();
+                let std_pt: f64 = pt_have.data.std(basek, 0).log2();
                 println!("{}", std_pt);
                 pt.data.zero();
             });

core/src/noise/glwe_ct.rs

@@ -1,12 +1,12 @@
 use backend::hal::{
-    api::{ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxNormalizeInplace, VecZnxStd, VecZnxSubABInplace},
+    api::{ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxNormalizeInplace, VecZnxSubABInplace},
     layouts::{Backend, DataRef, Module, ScratchOwned},
     oep::{ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeVecZnxBigImpl, TakeVecZnxDftImpl},
 };
 
 use crate::{
     layouts::GLWEPlaintext,
-    layouts::prepared::GLWESecretExec,
+    layouts::prepared::GLWESecretPrepared,
     layouts::{GLWECiphertext, Infos},
     trait_families::GLWEDecryptFamily,
 };
@@ -15,13 +15,13 @@ impl<D: DataRef> GLWECiphertext<D> {
     pub fn assert_noise<B: Backend, DataSk, DataPt>(
         &self,
         module: &Module<B>,
-        sk_exec: &GLWESecretExec<DataSk, B>,
+        sk_prepared: &GLWESecretPrepared<DataSk, B>,
         pt_want: &GLWEPlaintext<DataPt>,
         max_noise: f64,
     ) where
         DataSk: DataRef,
         DataPt: DataRef,
-        Module<B>: GLWEDecryptFamily<B> + VecZnxSubABInplace + VecZnxNormalizeInplace<B> + VecZnxStd,
+        Module<B>: GLWEDecryptFamily<B> + VecZnxSubABInplace + VecZnxNormalizeInplace<B>,
         B: TakeVecZnxDftImpl<B> + TakeVecZnxBigImpl<B> + ScratchOwnedAllocImpl<B> + ScratchOwnedBorrowImpl<B>,
     {
         let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(self.n(), self.basek(), self.k());
@@ -33,12 +33,12 @@ impl<D: DataRef> GLWECiphertext<D> {
             self.k(),
         ));
 
-        self.decrypt(module, &mut pt_have, &sk_exec, scratch.borrow());
+        self.decrypt(module, &mut pt_have, &sk_prepared, scratch.borrow());
 
         module.vec_znx_sub_ab_inplace(&mut pt_have.data, 0, &pt_want.data, 0);
         module.vec_znx_normalize_inplace(self.basek(), &mut pt_have.data, 0, scratch.borrow());
 
-        let noise_have: f64 = module.vec_znx_std(self.basek(), &pt_have.data, 0).log2();
+        let noise_have: f64 = pt_have.data.std(self.basek(), 0).log2();
         assert!(noise_have <= max_noise, "{} {}", noise_have, max_noise);
     }
 }

core/src/scratch.rs

@@ -7,11 +7,11 @@ use backend::hal::{
 use crate::{
     dist::Distribution,
     layouts::{
-        GGLWEAutomorphismKey, GGLWECiphertext, GGLWETensorKey, GGSWCiphertext, GLWECiphertext, GLWEPlaintext, GLWEPublicKey,
+        GGLWEAutomorphismKey, GGLWECiphertext, GGLWESwitchingKey, GGLWETensorKey, GGSWCiphertext, GLWECiphertext, GLWEPlaintext,
-        GLWESecret, GGLWESwitchingKey, Infos,
+        GLWEPublicKey, GLWESecret, Infos,
         prepared::{
-            GGLWEAutomorphismKeyExec, GGLWECiphertextExec, GGSWCiphertextExec, GLWEPublicKeyExec, GLWESecretExec,
+            GGLWEAutomorphismKeyPrepared, GGLWECiphertextPrepared, GGLWESwitchingKeyPrepared, GGLWETensorKeyPrepared,
-            GGLWESwitchingKeyExec, GGLWETensorKeyExec,
+            GGSWCiphertextPrepared, GLWEPublicKeyPrepared, GLWESecretPrepared,
         },
     },
 };
@@ -53,8 +53,8 @@ pub trait TakeGGLWE<B: Backend> {
     ) -> (GGLWECiphertext<&mut [u8]>, &mut Self);
 }
 
-pub trait TakeGGLWEExec<B: Backend> {
+pub trait TakeGGLWEPrepared<B: Backend> {
-    fn take_gglwe_exec(
+    fn take_gglwe_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -63,7 +63,7 @@ pub trait TakeGGLWEExec<B: Backend> {
         digits: usize,
         rank_in: usize,
         rank_out: usize,
-    ) -> (GGLWECiphertextExec<&mut [u8], B>, &mut Self);
+    ) -> (GGLWECiphertextPrepared<&mut [u8], B>, &mut Self);
 }
 
 pub trait TakeGGSW<B: Backend> {
@@ -78,8 +78,8 @@ pub trait TakeGGSW<B: Backend> {
     ) -> (GGSWCiphertext<&mut [u8]>, &mut Self);
 }
 
-pub trait TakeGGSWExec<B: Backend> {
+pub trait TakeGGSWPrepared<B: Backend> {
-    fn take_ggsw_exec(
+    fn take_ggsw_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -87,29 +87,29 @@ pub trait TakeGGSWExec<B: Backend> {
         rows: usize,
         digits: usize,
         rank: usize,
-    ) -> (GGSWCiphertextExec<&mut [u8], B>, &mut Self);
+    ) -> (GGSWCiphertextPrepared<&mut [u8], B>, &mut Self);
 }
 
 pub trait TakeGLWESecret<B: Backend> {
     fn take_glwe_secret(&mut self, n: usize, rank: usize) -> (GLWESecret<&mut [u8]>, &mut Self);
 }
 
-pub trait TakeGLWESecretExec<B: Backend> {
+pub trait TakeGLWESecretPrepared<B: Backend> {
-    fn take_glwe_secret_exec(&mut self, n: usize, rank: usize) -> (GLWESecretExec<&mut [u8], B>, &mut Self);
+    fn take_glwe_secret_prepared(&mut self, n: usize, rank: usize) -> (GLWESecretPrepared<&mut [u8], B>, &mut Self);
 }
 
 pub trait TakeGLWEPk<B: Backend> {
     fn take_glwe_pk(&mut self, n: usize, basek: usize, k: usize, rank: usize) -> (GLWEPublicKey<&mut [u8]>, &mut Self);
 }
 
-pub trait TakeGLWEPkExec<B: Backend> {
+pub trait TakeGLWEPkPrepared<B: Backend> {
-    fn take_glwe_pk_exec(
+    fn take_glwe_pk_prepared(
         &mut self,
         n: usize,
         basek: usize,
         k: usize,
         rank: usize,
-    ) -> (GLWEPublicKeyExec<&mut [u8], B>, &mut Self);
+    ) -> (GLWEPublicKeyPrepared<&mut [u8], B>, &mut Self);
 }
 
 pub trait TakeGLWESwitchingKey<B: Backend> {
@@ -125,8 +125,8 @@ pub trait TakeGLWESwitchingKey<B: Backend> {
     ) -> (GGLWESwitchingKey<&mut [u8]>, &mut Self);
 }
 
-pub trait TakeGLWESwitchingKeyExec<B: Backend> {
+pub trait TakeGLWESwitchingKeyPrepared<B: Backend> {
-    fn take_glwe_switching_key_exec(
+    fn take_glwe_switching_key_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -135,7 +135,7 @@ pub trait TakeGLWESwitchingKeyExec<B: Backend> {
         digits: usize,
         rank_in: usize,
         rank_out: usize,
-    ) -> (GGLWESwitchingKeyExec<&mut [u8], B>, &mut Self);
+    ) -> (GGLWESwitchingKeyPrepared<&mut [u8], B>, &mut Self);
 }
 
 pub trait TakeTensorKey<B: Backend> {
@@ -150,8 +150,8 @@ pub trait TakeTensorKey<B: Backend> {
     ) -> (GGLWETensorKey<&mut [u8]>, &mut Self);
 }
 
-pub trait TakeTensorKeyExec<B: Backend> {
+pub trait TakeTensorKeyPrepared<B: Backend> {
-    fn take_tensor_key_exec(
+    fn take_tensor_key_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -159,7 +159,7 @@ pub trait TakeTensorKeyExec<B: Backend> {
         rows: usize,
         digits: usize,
         rank: usize,
-    ) -> (GGLWETensorKeyExec<&mut [u8], B>, &mut Self);
+    ) -> (GGLWETensorKeyPrepared<&mut [u8], B>, &mut Self);
 }
 
 pub trait TakeAutomorphismKey<B: Backend> {
@@ -174,8 +174,8 @@ pub trait TakeAutomorphismKey<B: Backend> {
     ) -> (GGLWEAutomorphismKey<&mut [u8]>, &mut Self);
 }
 
-pub trait TakeAutomorphismKeyExec<B: Backend> {
+pub trait TakeAutomorphismKeyPrepared<B: Backend> {
-    fn take_automorphism_key_exec(
+    fn take_automorphism_key_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -183,7 +183,7 @@ pub trait TakeAutomorphismKeyExec<B: Backend> {
         rows: usize,
         digits: usize,
         rank: usize,
-    ) -> (GGLWEAutomorphismKeyExec<&mut [u8], B>, &mut Self);
+    ) -> (GGLWEAutomorphismKeyPrepared<&mut [u8], B>, &mut Self);
 }
 
 impl<B: Backend> TakeGLWECt<B> for Scratch<B>
@@ -330,11 +330,11 @@ where
     }
 }
 
-impl<B: Backend> TakeGGLWEExec<B> for Scratch<B>
+impl<B: Backend> TakeGGLWEPrepared<B> for Scratch<B>
 where
     Scratch<B>: TakeVmpPMat<B>,
 {
-    fn take_gglwe_exec(
+    fn take_gglwe_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -343,7 +343,7 @@ where
         digits: usize,
         rank_in: usize,
         rank_out: usize,
-    ) -> (GGLWECiphertextExec<&mut [u8], B>, &mut Self) {
+    ) -> (GGLWECiphertextPrepared<&mut [u8], B>, &mut Self) {
         let (data, scratch) = self.take_vmp_pmat(
             n,
             rows.div_ceil(digits),
@@ -352,7 +352,7 @@ where
             k.div_ceil(basek),
         );
         (
-            GGLWECiphertextExec {
+            GGLWECiphertextPrepared {
                 data: data,
                 basek: basek,
                 k,
@@ -363,14 +363,14 @@ where
     }
 }
 
-impl<'a, B, D> TakeLike<'a, B, GGLWECiphertextExec<D, B>> for Scratch<B>
+impl<'a, B, D> TakeLike<'a, B, GGLWECiphertextPrepared<D, B>> for Scratch<B>
 where
     B: Backend + TakeVmpPMatImpl<B>,
     D: DataRef,
 {
-    type Output = GGLWECiphertextExec<&'a mut [u8], B>;
+    type Output = GGLWECiphertextPrepared<&'a mut [u8], B>;
 
-    fn take_like(&'a mut self, template: &GGLWECiphertextExec<D, B>) -> (Self::Output, &'a mut Self) {
+    fn take_like(&'a mut self, template: &GGLWECiphertextPrepared<D, B>) -> (Self::Output, &'a mut Self) {
         let (data, scratch) = B::take_vmp_pmat_impl(
             self,
             template.n(),
@@ -380,7 +380,7 @@ where
             template.size(),
         );
         (
-            GGLWECiphertextExec {
+            GGLWECiphertextPrepared {
                 data,
                 basek: template.basek(),
                 k: template.k(),
@@ -451,11 +451,11 @@ where
     }
 }
 
-impl<B: Backend> TakeGGSWExec<B> for Scratch<B>
+impl<B: Backend> TakeGGSWPrepared<B> for Scratch<B>
 where
     Scratch<B>: TakeVmpPMat<B>,
 {
-    fn take_ggsw_exec(
+    fn take_ggsw_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -463,7 +463,7 @@ where
         rows: usize,
         digits: usize,
         rank: usize,
-    ) -> (GGSWCiphertextExec<&mut [u8], B>, &mut Self) {
+    ) -> (GGSWCiphertextPrepared<&mut [u8], B>, &mut Self) {
         let (data, scratch) = self.take_vmp_pmat(
             n,
             rows.div_ceil(digits),
@@ -472,7 +472,7 @@ where
             k.div_ceil(basek),
         );
         (
-            GGSWCiphertextExec {
+            GGSWCiphertextPrepared {
                 data,
                 basek,
                 k,
@@ -483,14 +483,14 @@ where
     }
 }
 
-impl<'a, B, D> TakeLike<'a, B, GGSWCiphertextExec<D, B>> for Scratch<B>
+impl<'a, B, D> TakeLike<'a, B, GGSWCiphertextPrepared<D, B>> for Scratch<B>
 where
     B: Backend + TakeVmpPMatImpl<B>,
     D: DataRef,
 {
-    type Output = GGSWCiphertextExec<&'a mut [u8], B>;
+    type Output = GGSWCiphertextPrepared<&'a mut [u8], B>;
 
-    fn take_like(&'a mut self, template: &GGSWCiphertextExec<D, B>) -> (Self::Output, &'a mut Self) {
+    fn take_like(&'a mut self, template: &GGSWCiphertextPrepared<D, B>) -> (Self::Output, &'a mut Self) {
         let (data, scratch) = B::take_vmp_pmat_impl(
             self,
             template.n(),
@@ -500,7 +500,7 @@ where
             template.size(),
         );
         (
-            GGSWCiphertextExec {
+            GGSWCiphertextPrepared {
                 data,
                 basek: template.basek(),
                 k: template.k(),
@@ -550,20 +550,20 @@ where
     }
 }
 
-impl<B: Backend> TakeGLWEPkExec<B> for Scratch<B>
+impl<B: Backend> TakeGLWEPkPrepared<B> for Scratch<B>
 where
     Scratch<B>: TakeVecZnxDft<B>,
 {
-    fn take_glwe_pk_exec(
+    fn take_glwe_pk_prepared(
         &mut self,
         n: usize,
         basek: usize,
         k: usize,
         rank: usize,
-    ) -> (GLWEPublicKeyExec<&mut [u8], B>, &mut Self) {
+    ) -> (GLWEPublicKeyPrepared<&mut [u8], B>, &mut Self) {
         let (data, scratch) = self.take_vec_znx_dft(n, rank + 1, k.div_ceil(basek));
         (
-            GLWEPublicKeyExec {
+            GLWEPublicKeyPrepared {
                 data,
                 k,
                 basek,
@@ -574,17 +574,17 @@ where
     }
 }
 
-impl<'a, B, D> TakeLike<'a, B, GLWEPublicKeyExec<D, B>> for Scratch<B>
+impl<'a, B, D> TakeLike<'a, B, GLWEPublicKeyPrepared<D, B>> for Scratch<B>
 where
     B: Backend + TakeVecZnxDftImpl<B>,
     D: DataRef,
 {
-    type Output = GLWEPublicKeyExec<&'a mut [u8], B>;
+    type Output = GLWEPublicKeyPrepared<&'a mut [u8], B>;
 
-    fn take_like(&'a mut self, template: &GLWEPublicKeyExec<D, B>) -> (Self::Output, &'a mut Self) {
+    fn take_like(&'a mut self, template: &GLWEPublicKeyPrepared<D, B>) -> (Self::Output, &'a mut Self) {
         let (data, scratch) = B::take_vec_znx_dft_impl(self, template.n(), template.cols(), template.size());
         (
-            GLWEPublicKeyExec {
+            GLWEPublicKeyPrepared {
                 data,
                 basek: template.basek(),
                 k: template.k(),
@@ -630,14 +630,14 @@ where
     }
 }
 
-impl<B: Backend> TakeGLWESecretExec<B> for Scratch<B>
+impl<B: Backend> TakeGLWESecretPrepared<B> for Scratch<B>
 where
     Scratch<B>: TakeSvpPPol<B>,
 {
-    fn take_glwe_secret_exec(&mut self, n: usize, rank: usize) -> (GLWESecretExec<&mut [u8], B>, &mut Self) {
+    fn take_glwe_secret_prepared(&mut self, n: usize, rank: usize) -> (GLWESecretPrepared<&mut [u8], B>, &mut Self) {
         let (data, scratch) = self.take_svp_ppol(n, rank);
         (
-            GLWESecretExec {
+            GLWESecretPrepared {
                 data,
                 dist: Distribution::NONE,
             },
@@ -646,17 +646,17 @@ where
     }
 }
 
-impl<'a, B, D> TakeLike<'a, B, GLWESecretExec<D, B>> for Scratch<B>
+impl<'a, B, D> TakeLike<'a, B, GLWESecretPrepared<D, B>> for Scratch<B>
 where
     B: Backend + TakeSvpPPolImpl<B>,
     D: DataRef,
 {
-    type Output = GLWESecretExec<&'a mut [u8], B>;
+    type Output = GLWESecretPrepared<&'a mut [u8], B>;
 
-    fn take_like(&'a mut self, template: &GLWESecretExec<D, B>) -> (Self::Output, &'a mut Self) {
+    fn take_like(&'a mut self, template: &GLWESecretPrepared<D, B>) -> (Self::Output, &'a mut Self) {
         let (data, scratch) = B::take_svp_ppol_impl(self, template.n(), template.rank());
         (
-            GLWESecretExec {
+            GLWESecretPrepared {
                 data,
                 dist: template.dist,
             },
@@ -712,11 +712,11 @@ where
     }
 }
 
-impl<B: Backend> TakeGLWESwitchingKeyExec<B> for Scratch<B>
+impl<B: Backend> TakeGLWESwitchingKeyPrepared<B> for Scratch<B>
 where
-    Scratch<B>: TakeGGLWEExec<B>,
+    Scratch<B>: TakeGGLWEPrepared<B>,
 {
-    fn take_glwe_switching_key_exec(
+    fn take_glwe_switching_key_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -725,10 +725,10 @@ where
         digits: usize,
         rank_in: usize,
         rank_out: usize,
-    ) -> (GGLWESwitchingKeyExec<&mut [u8], B>, &mut Self) {
+    ) -> (GGLWESwitchingKeyPrepared<&mut [u8], B>, &mut Self) {
-        let (data, scratch) = self.take_gglwe_exec(n, basek, k, rows, digits, rank_in, rank_out);
+        let (data, scratch) = self.take_gglwe_prepared(n, basek, k, rows, digits, rank_in, rank_out);
         (
-            GGLWESwitchingKeyExec {
+            GGLWESwitchingKeyPrepared {
                 key: data,
                 sk_in_n: 0,
                 sk_out_n: 0,
@@ -738,18 +738,18 @@ where
     }
 }
 
-impl<'a, B, D> TakeLike<'a, B, GGLWESwitchingKeyExec<D, B>> for Scratch<B>
+impl<'a, B, D> TakeLike<'a, B, GGLWESwitchingKeyPrepared<D, B>> for Scratch<B>
 where
-    Scratch<B>: TakeLike<'a, B, GGLWECiphertextExec<D, B>, Output = GGLWECiphertextExec<&'a mut [u8], B>>,
+    Scratch<B>: TakeLike<'a, B, GGLWECiphertextPrepared<D, B>, Output = GGLWECiphertextPrepared<&'a mut [u8], B>>,
     B: Backend + TakeMatZnxImpl<B>,
     D: DataRef,
 {
-    type Output = GGLWESwitchingKeyExec<&'a mut [u8], B>;
+    type Output = GGLWESwitchingKeyPrepared<&'a mut [u8], B>;
 
-    fn take_like(&'a mut self, template: &GGLWESwitchingKeyExec<D, B>) -> (Self::Output, &'a mut Self) {
+    fn take_like(&'a mut self, template: &GGLWESwitchingKeyPrepared<D, B>) -> (Self::Output, &'a mut Self) {
         let (key, scratch) = self.take_like(&template.key);
         (
-            GGLWESwitchingKeyExec {
+            GGLWESwitchingKeyPrepared {
                 key,
                 sk_in_n: template.sk_in_n,
                 sk_out_n: template.sk_out_n,
@@ -791,11 +791,11 @@ where
     }
 }
 
-impl<B: Backend> TakeAutomorphismKeyExec<B> for Scratch<B>
+impl<B: Backend> TakeAutomorphismKeyPrepared<B> for Scratch<B>
 where
-    Scratch<B>: TakeGLWESwitchingKeyExec<B>,
+    Scratch<B>: TakeGLWESwitchingKeyPrepared<B>,
 {
-    fn take_automorphism_key_exec(
+    fn take_automorphism_key_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -803,23 +803,23 @@ where
         rows: usize,
         digits: usize,
         rank: usize,
-    ) -> (GGLWEAutomorphismKeyExec<&mut [u8], B>, &mut Self) {
+    ) -> (GGLWEAutomorphismKeyPrepared<&mut [u8], B>, &mut Self) {
-        let (data, scratch) = self.take_glwe_switching_key_exec(n, basek, k, rows, digits, rank, rank);
+        let (data, scratch) = self.take_glwe_switching_key_prepared(n, basek, k, rows, digits, rank, rank);
-        (GGLWEAutomorphismKeyExec { key: data, p: 0 }, scratch)
+        (GGLWEAutomorphismKeyPrepared { key: data, p: 0 }, scratch)
     }
 }
 
-impl<'a, B, D> TakeLike<'a, B, GGLWEAutomorphismKeyExec<D, B>> for Scratch<B>
+impl<'a, B, D> TakeLike<'a, B, GGLWEAutomorphismKeyPrepared<D, B>> for Scratch<B>
 where
-    Scratch<B>: TakeLike<'a, B, GGLWESwitchingKeyExec<D, B>, Output = GGLWESwitchingKeyExec<&'a mut [u8], B>>,
+    Scratch<B>: TakeLike<'a, B, GGLWESwitchingKeyPrepared<D, B>, Output = GGLWESwitchingKeyPrepared<&'a mut [u8], B>>,
     B: Backend + TakeMatZnxImpl<B>,
     D: DataRef,
 {
-    type Output = GGLWEAutomorphismKeyExec<&'a mut [u8], B>;
+    type Output = GGLWEAutomorphismKeyPrepared<&'a mut [u8], B>;
 
-    fn take_like(&'a mut self, template: &GGLWEAutomorphismKeyExec<D, B>) -> (Self::Output, &'a mut Self) {
+    fn take_like(&'a mut self, template: &GGLWEAutomorphismKeyPrepared<D, B>) -> (Self::Output, &'a mut Self) {
         let (key, scratch) = self.take_like(&template.key);
-        (GGLWEAutomorphismKeyExec { key, p: template.p }, scratch)
+        (GGLWEAutomorphismKeyPrepared { key, p: template.p }, scratch)
     }
 }
 
@@ -884,11 +884,11 @@ where
     }
 }
 
-impl<B: Backend> TakeTensorKeyExec<B> for Scratch<B>
+impl<B: Backend> TakeTensorKeyPrepared<B> for Scratch<B>
 where
     Scratch<B>: TakeVmpPMat<B>,
 {
-    fn take_tensor_key_exec(
+    fn take_tensor_key_prepared(
         &mut self,
         n: usize,
         basek: usize,
@@ -896,36 +896,36 @@ where
         rows: usize,
         digits: usize,
         rank: usize,
-    ) -> (GGLWETensorKeyExec<&mut [u8], B>, &mut Self) {
+    ) -> (GGLWETensorKeyPrepared<&mut [u8], B>, &mut Self) {
-        let mut keys: Vec<GGLWESwitchingKeyExec<&mut [u8], B>> = Vec::new();
+        let mut keys: Vec<GGLWESwitchingKeyPrepared<&mut [u8], B>> = Vec::new();
         let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
 
         let mut scratch: &mut Scratch<B> = self;
 
         if pairs != 0 {
-            let (gglwe, s) = scratch.take_glwe_switching_key_exec(n, basek, k, rows, digits, 1, rank);
+            let (gglwe, s) = scratch.take_glwe_switching_key_prepared(n, basek, k, rows, digits, 1, rank);
             scratch = s;
             keys.push(gglwe);
         }
         for _ in 1..pairs {
-            let (gglwe, s) = scratch.take_glwe_switching_key_exec(n, basek, k, rows, digits, 1, rank);
+            let (gglwe, s) = scratch.take_glwe_switching_key_prepared(n, basek, k, rows, digits, 1, rank);
             scratch = s;
             keys.push(gglwe);
         }
-        (GGLWETensorKeyExec { keys }, scratch)
+        (GGLWETensorKeyPrepared { keys }, scratch)
     }
 }
 
-impl<'a, B, D> TakeLike<'a, B, GGLWETensorKeyExec<D, B>> for Scratch<B>
+impl<'a, B, D> TakeLike<'a, B, GGLWETensorKeyPrepared<D, B>> for Scratch<B>
 where
-    Scratch<B>: TakeLike<'a, B, GGLWESwitchingKeyExec<D, B>, Output = GGLWESwitchingKeyExec<&'a mut [u8], B>>,
+    Scratch<B>: TakeLike<'a, B, GGLWESwitchingKeyPrepared<D, B>, Output = GGLWESwitchingKeyPrepared<&'a mut [u8], B>>,
     B: Backend + TakeMatZnxImpl<B>,
     D: DataRef,
 {
-    type Output = GGLWETensorKeyExec<&'a mut [u8], B>;
+    type Output = GGLWETensorKeyPrepared<&'a mut [u8], B>;
 
-    fn take_like(&'a mut self, template: &GGLWETensorKeyExec<D, B>) -> (Self::Output, &'a mut Self) {
+    fn take_like(&'a mut self, template: &GGLWETensorKeyPrepared<D, B>) -> (Self::Output, &'a mut Self) {
-        let mut keys: Vec<GGLWESwitchingKeyExec<&mut [u8], B>> = Vec::new();
+        let mut keys: Vec<GGLWESwitchingKeyPrepared<&mut [u8], B>> = Vec::new();
         let pairs: usize = template.keys.len();
 
         let mut scratch: &mut Scratch<B> = self;
@@ -941,6 +941,6 @@ where
             keys.push(gglwe);
         }
 
-        (GGLWETensorKeyExec { keys }, scratch)
+        (GGLWETensorKeyPrepared { keys }, scratch)
     }
 }

core/src/tests/generics/automorphism/gglwe_atk.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
         ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxAutomorphismInplace, VecZnxCopy,
-        VecZnxStd, VecZnxSubScalarInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
+        VecZnxSubScalarInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -14,13 +14,13 @@ use sampling::source::Source;
 use crate::{
     layouts::{
         GGLWEAutomorphismKey, GLWEPlaintext, GLWESecret, Infos,
-        prepared::{GGLWEAutomorphismKeyExec, GLWESecretExec},
+        prepared::{GGLWEAutomorphismKeyPrepared, GLWESecretPrepared, Prepare, PrepareAlloc},
     },
     noise::log2_std_noise_gglwe_product,
     trait_families::{GLWEDecryptFamily, GLWEKeyswitchFamily},
 };
 
-use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_gglwe_automorphism_key_automorphism<B: Backend>(
     module: &Module<B>,
@@ -35,7 +35,7 @@ pub fn test_gglwe_automorphism_key_automorphism<B: Backend>(
     rank: usize,
 ) where
     Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEKeyswitchFamily<B>
         + VecZnxAutomorphism
         + VecZnxSwithcDegree
@@ -44,7 +44,6 @@ pub fn test_gglwe_automorphism_key_automorphism<B: Backend>(
         + VecZnxAutomorphismInplace
         + GLWEDecryptFamily<B>
         + VecZnxSubScalarInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
@@ -102,13 +101,18 @@ pub fn test_gglwe_automorphism_key_automorphism<B: Backend>(
         scratch.borrow(),
     );
 
-    let mut auto_key_apply_exec: GGLWEAutomorphismKeyExec<Vec<u8>, B> =
+    let mut auto_key_apply_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, B> =
-        GGLWEAutomorphismKeyExec::alloc(module, n, basek, k_apply, rows_apply, digits, rank);
+        GGLWEAutomorphismKeyPrepared::alloc(module, n, basek, k_apply, rows_apply, digits, rank);
 
-    auto_key_apply_exec.prepare(module, &auto_key_apply, scratch.borrow());
+    auto_key_apply_prepared.prepare(module, &auto_key_apply, scratch.borrow());
 
     // gglwe_{s1}(s0) (x) gglwe_{s2}(s1) = gglwe_{s2}(s0)
-    auto_key_out.automorphism(module, &auto_key_in, &auto_key_apply_exec, scratch.borrow());
+    auto_key_out.automorphism(
+        module,
+        &auto_key_in,
+        &auto_key_apply_prepared,
+        scratch.borrow(),
+    );
 
     let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k_out);
 
@@ -124,7 +128,7 @@ pub fn test_gglwe_automorphism_key_automorphism<B: Backend>(
         );
     });
 
-    let sk_auto_dft: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_auto);
+    let sk_auto_dft: GLWESecretPrepared<Vec<u8>, B> = sk_auto.prepare_alloc(module, scratch.borrow());
 
     (0..auto_key_out.rank_in()).for_each(|col_i| {
         (0..auto_key_out.rows()).for_each(|row_i| {
@@ -140,7 +144,7 @@ pub fn test_gglwe_automorphism_key_automorphism<B: Backend>(
                 col_i,
             );
 
-            let noise_have: f64 = module.vec_znx_std(basek, &pt.data, 0).log2();
+            let noise_have: f64 = pt.data.std(basek, 0).log2();
             let noise_want: f64 = log2_std_noise_gglwe_product(
                 n as f64,
                 basek * digits,
@@ -176,7 +180,7 @@ pub fn test_gglwe_automorphism_key_automorphism_inplace<B: Backend>(
     rank: usize,
 ) where
     Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEKeyswitchFamily<B>
         + VecZnxAutomorphism
         + VecZnxSwithcDegree
@@ -185,7 +189,6 @@ pub fn test_gglwe_automorphism_key_automorphism_inplace<B: Backend>(
         + VecZnxAutomorphismInplace
         + GLWEDecryptFamily<B>
         + VecZnxSubScalarInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
@@ -242,13 +245,13 @@ pub fn test_gglwe_automorphism_key_automorphism_inplace<B: Backend>(
         scratch.borrow(),
     );
 
-    let mut auto_key_apply_exec: GGLWEAutomorphismKeyExec<Vec<u8>, B> =
+    let mut auto_key_apply_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, B> =
-        GGLWEAutomorphismKeyExec::alloc(module, n, basek, k_apply, rows_apply, digits, rank);
+        GGLWEAutomorphismKeyPrepared::alloc(module, n, basek, k_apply, rows_apply, digits, rank);
 
-    auto_key_apply_exec.prepare(module, &auto_key_apply, scratch.borrow());
+    auto_key_apply_prepared.prepare(module, &auto_key_apply, scratch.borrow());
 
     // gglwe_{s1}(s0) (x) gglwe_{s2}(s1) = gglwe_{s2}(s0)
-    auto_key.automorphism_inplace(module, &auto_key_apply_exec, scratch.borrow());
+    auto_key.automorphism_inplace(module, &auto_key_apply_prepared, scratch.borrow());
 
     let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k_in);
 
@@ -265,7 +268,7 @@ pub fn test_gglwe_automorphism_key_automorphism_inplace<B: Backend>(
         );
     });
 
-    let sk_auto_dft: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_auto);
+    let sk_auto_dft: GLWESecretPrepared<Vec<u8>, B> = sk_auto.prepare_alloc(module, scratch.borrow());
 
     (0..auto_key.rank_in()).for_each(|col_i| {
         (0..auto_key.rows()).for_each(|row_i| {
@@ -280,7 +283,7 @@ pub fn test_gglwe_automorphism_key_automorphism_inplace<B: Backend>(
                 col_i,
             );
 
-            let noise_have: f64 = module.vec_znx_std(basek, &pt.data, 0).log2();
+            let noise_have: f64 = pt.data.std(basek, 0).log2();
             let noise_want: f64 = log2_std_noise_gglwe_product(
                 n as f64,
                 basek * digits,

core/src/tests/generics/automorphism/ggsw_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
         ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxAutomorphismInplace, VecZnxCopy,
-        VecZnxStd, VecZnxSubABInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
+        VecZnxSubABInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScalarZnx, ScratchOwned},
     oep::{
@@ -14,14 +14,14 @@ use sampling::source::Source;
 use crate::{
     layouts::{
         GGLWEAutomorphismKey, GGLWETensorKey, GGSWCiphertext, GLWESecret,
-        prepared::{GGLWEAutomorphismKeyExec, GLWESecretExec, GGLWETensorKeyExec},
+        prepared::{GGLWEAutomorphismKeyPrepared, GGLWETensorKeyPrepared, GLWESecretPrepared, Prepare, PrepareAlloc},
     },
     noise::noise_ggsw_keyswitch,
     trait_families::GGSWAssertNoiseFamily,
 };
 
 use crate::trait_families::{
-    GGLWESwitchingKeyEncryptSkFamily, GGLWETensorKeyEncryptSkFamily, GGSWKeySwitchFamily, GLWESecretExecModuleFamily,
+    GGLWESwitchingKeyEncryptSkFamily, GGLWETensorKeyEncryptSkFamily, GGSWKeySwitchFamily, GLWESecretPreparedModuleFamily,
 };
 
 pub fn test_ggsw_automorphism<B: Backend>(
@@ -37,10 +37,9 @@ pub fn test_ggsw_automorphism<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGSWAssertNoiseFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxCopy
-        + VecZnxStd
         + VecZnxSubABInplace
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
@@ -92,7 +91,7 @@ pub fn test_ggsw_automorphism<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     auto_key.encrypt_sk(
         module,
@@ -117,21 +116,28 @@ pub fn test_ggsw_automorphism<B: Backend>(
     ct_in.encrypt_sk(
         module,
         &pt_scalar,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let mut auto_key_exec: GGLWEAutomorphismKeyExec<Vec<u8>, B> =
+    let mut auto_key_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, B> =
-        GGLWEAutomorphismKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
+        GGLWEAutomorphismKeyPrepared::alloc(module, n, basek, k_ksk, rows, digits, rank);
-    auto_key_exec.prepare(module, &auto_key, scratch.borrow());
+    auto_key_prepared.prepare(module, &auto_key, scratch.borrow());
 
-    let mut tsk_exec: GGLWETensorKeyExec<Vec<u8>, B> = GGLWETensorKeyExec::alloc(module, n, basek, k_tsk, rows, digits, rank);
+    let mut tsk_prepared: GGLWETensorKeyPrepared<Vec<u8>, B> =
-    tsk_exec.prepare(module, &tensor_key, scratch.borrow());
+        GGLWETensorKeyPrepared::alloc(module, n, basek, k_tsk, rows, digits, rank);
+    tsk_prepared.prepare(module, &tensor_key, scratch.borrow());
 
-    ct_out.automorphism(module, &ct_in, &auto_key_exec, &tsk_exec, scratch.borrow());
+    ct_out.automorphism(
+        module,
+        &ct_in,
+        &auto_key_prepared,
+        &tsk_prepared,
+        scratch.borrow(),
+    );
 
     module.vec_znx_automorphism_inplace(p, &mut pt_scalar.as_vec_znx_mut(), 0);
 
@@ -151,7 +157,7 @@ pub fn test_ggsw_automorphism<B: Backend>(
         ) + 0.5
     };
 
-    ct_out.assert_noise(module, &sk_exec, &pt_scalar, &max_noise);
+    ct_out.assert_noise(module, &sk_prepared, &pt_scalar, &max_noise);
 }
 
 pub fn test_ggsw_automorphism_inplace<B: Backend>(
@@ -166,10 +172,9 @@ pub fn test_ggsw_automorphism_inplace<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGSWAssertNoiseFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxCopy
-        + VecZnxStd
         + VecZnxSubABInplace
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
@@ -217,7 +222,7 @@ pub fn test_ggsw_automorphism_inplace<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     auto_key.encrypt_sk(
         module,
@@ -242,21 +247,22 @@ pub fn test_ggsw_automorphism_inplace<B: Backend>(
     ct.encrypt_sk(
         module,
         &pt_scalar,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let mut auto_key_exec: GGLWEAutomorphismKeyExec<Vec<u8>, B> =
+    let mut auto_key_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, B> =
-        GGLWEAutomorphismKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
+        GGLWEAutomorphismKeyPrepared::alloc(module, n, basek, k_ksk, rows, digits, rank);
-    auto_key_exec.prepare(module, &auto_key, scratch.borrow());
+    auto_key_prepared.prepare(module, &auto_key, scratch.borrow());
 
-    let mut tsk_exec: GGLWETensorKeyExec<Vec<u8>, B> = GGLWETensorKeyExec::alloc(module, n, basek, k_tsk, rows, digits, rank);
+    let mut tsk_prepared: GGLWETensorKeyPrepared<Vec<u8>, B> =
-    tsk_exec.prepare(module, &tensor_key, scratch.borrow());
+        GGLWETensorKeyPrepared::alloc(module, n, basek, k_tsk, rows, digits, rank);
+    tsk_prepared.prepare(module, &tensor_key, scratch.borrow());
 
-    ct.automorphism_inplace(module, &auto_key_exec, &tsk_exec, scratch.borrow());
+    ct.automorphism_inplace(module, &auto_key_prepared, &tsk_prepared, scratch.borrow());
 
     module.vec_znx_automorphism_inplace(p, &mut pt_scalar.as_vec_znx_mut(), 0);
 
@@ -276,5 +282,5 @@ pub fn test_ggsw_automorphism_inplace<B: Backend>(
         ) + 0.5
     };
 
-    ct.assert_noise(module, &sk_exec, &pt_scalar, &max_noise);
+    ct.assert_noise(module, &sk_prepared, &pt_scalar, &max_noise);
 }

core/src/tests/generics/automorphism/glwe_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
         ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxAutomorphismInplace,
-        VecZnxFillUniform, VecZnxStd, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
+        VecZnxFillUniform, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -14,13 +14,13 @@ use sampling::source::Source;
 use crate::{
     layouts::{
         GGLWEAutomorphismKey, GLWECiphertext, GLWEPlaintext, GLWESecret, Infos,
-        prepared::{GGLWEAutomorphismKeyExec, GLWESecretExec},
+        prepared::{GGLWEAutomorphismKeyPrepared, GLWESecretPrepared, Prepare, PrepareAlloc},
     },
     noise::log2_std_noise_gglwe_product,
     trait_families::{GLWEDecryptFamily, GLWEKeyswitchFamily},
 };
 
-use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_glwe_automorphism<B: Backend>(
     module: &Module<B>,
@@ -34,14 +34,13 @@ pub fn test_glwe_automorphism<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + GLWEKeyswitchFamily<B>
         + VecZnxAutomorphism
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
         + VecZnxAutomorphismInplace
-        + VecZnxStd
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
     B: TakeVecZnxDftImpl<B>
@@ -85,7 +84,7 @@ pub fn test_glwe_automorphism<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     autokey.encrypt_sk(
         module,
@@ -100,18 +99,18 @@ pub fn test_glwe_automorphism<B: Backend>(
     ct_in.encrypt_sk(
         module,
         &pt_want,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let mut autokey_exec: GGLWEAutomorphismKeyExec<Vec<u8>, B> =
+    let mut autokey_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, B> =
-        GGLWEAutomorphismKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
+        GGLWEAutomorphismKeyPrepared::alloc(module, n, basek, k_ksk, rows, digits, rank);
-    autokey_exec.prepare(module, &autokey, scratch.borrow());
+    autokey_prepared.prepare(module, &autokey, scratch.borrow());
 
-    ct_out.automorphism(module, &ct_in, &autokey_exec, scratch.borrow());
+    ct_out.automorphism(module, &ct_in, &autokey_prepared, scratch.borrow());
 
     let max_noise: f64 = log2_std_noise_gglwe_product(
         module.n() as f64,
@@ -128,7 +127,7 @@ pub fn test_glwe_automorphism<B: Backend>(
 
     module.vec_znx_automorphism_inplace(p, &mut pt_want.data, 0);
 
-    ct_out.assert_noise(module, &sk_exec, &pt_want, max_noise + 1.0);
+    ct_out.assert_noise(module, &sk_prepared, &pt_want, max_noise + 1.0);
 }
 
 pub fn test_glwe_automorphism_inplace<B: Backend>(
@@ -142,14 +141,13 @@ pub fn test_glwe_automorphism_inplace<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + GLWEKeyswitchFamily<B>
         + VecZnxAutomorphism
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
         + VecZnxAutomorphismInplace
-        + VecZnxStd
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
     B: TakeVecZnxDftImpl<B>
@@ -183,7 +181,7 @@ pub fn test_glwe_automorphism_inplace<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     autokey.encrypt_sk(
         module,
@@ -198,18 +196,18 @@ pub fn test_glwe_automorphism_inplace<B: Backend>(
     ct.encrypt_sk(
         module,
         &pt_want,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let mut autokey_exec: GGLWEAutomorphismKeyExec<Vec<u8>, B> =
+    let mut autokey_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, B> =
-        GGLWEAutomorphismKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
+        GGLWEAutomorphismKeyPrepared::alloc(module, n, basek, k_ksk, rows, digits, rank);
-    autokey_exec.prepare(module, &autokey, scratch.borrow());
+    autokey_prepared.prepare(module, &autokey, scratch.borrow());
 
-    ct.automorphism_inplace(module, &autokey_exec, scratch.borrow());
+    ct.automorphism_inplace(module, &autokey_prepared, scratch.borrow());
 
     let max_noise: f64 = log2_std_noise_gglwe_product(
         module.n() as f64,
@@ -226,5 +224,5 @@ pub fn test_glwe_automorphism_inplace<B: Backend>(
 
     module.vec_znx_automorphism_inplace(p, &mut pt_want.data, 0);
 
-    ct.assert_noise(module, &sk_exec, &pt_want, max_noise + 1.0);
+    ct.assert_noise(module, &sk_prepared, &pt_want, max_noise + 1.0);
 }

core/src/tests/generics/conversion.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphismInplace, VecZnxEncodeCoeffsi64,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphismInplace, VecZnxSwithcDegree,
-        VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare, ZnxView,
+        VmpPMatAlloc, VmpPMatPrepare, ZnxView,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -14,10 +14,10 @@ use sampling::source::Source;
 use crate::layouts::{
     GLWECiphertext, GLWEPlaintext, GLWESecret, GLWEToLWESwitchingKey, Infos, LWECiphertext, LWEPlaintext, LWESecret,
     LWEToGLWESwitchingKey,
-    prepared::{GLWESecretExec, GLWEToLWESwitchingKeyExec, LWEToGLWESwitchingKeyExec},
+    prepared::{GLWESecretPrepared, GLWEToLWESwitchingKeyPrepared, LWEToGLWESwitchingKeyPrepared, PrepareAlloc},
 };
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GLWEDecryptFamily, GLWEKeyswitchFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GLWEDecryptFamily, GLWEKeyswitchFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_lwe_to_glwe<B: Backend>(module: &Module<B>)
 where
@@ -26,11 +26,10 @@ where
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
         + GLWEKeyswitchFamily<B>
-        + VecZnxEncodeCoeffsi64
         + VecZnxAutomorphismInplace
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
-        + GLWESecretExecModuleFamily<B>,
+        + GLWESecretPreparedModuleFamily<B>,
     B: TakeScalarZnxImpl<B>
         + TakeVecZnxDftImpl<B>
         + ScratchAvailableImpl<B>
@@ -67,7 +66,7 @@ where
     let mut sk_glwe: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
     sk_glwe.fill_ternary_prob(0.5, &mut source_xs);
 
-    let sk_glwe_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_glwe);
+    let sk_glwe_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_glwe.prepare_alloc(module, scratch.borrow());
 
     let mut sk_lwe: LWESecret<Vec<u8>> = LWESecret::alloc(n_lwe);
     sk_lwe.fill_ternary_prob(0.5, &mut source_xs);
@@ -75,7 +74,7 @@ where
     let data: i64 = 17;
 
     let mut lwe_pt: LWEPlaintext<Vec<u8>> = LWEPlaintext::alloc(basek, k_lwe_pt);
-    module.encode_coeff_i64(basek, &mut lwe_pt.data, 0, k_lwe_pt, 0, data, k_lwe_pt);
+    lwe_pt.encode_i64(data, k_lwe_pt);
 
     let mut lwe_ct: LWECiphertext<Vec<u8>> = LWECiphertext::alloc(n_lwe, basek, k_lwe_ct);
     lwe_ct.encrypt_sk(
@@ -101,12 +100,12 @@ where
 
     let mut glwe_ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_glwe_ct, rank);
 
-    let ksk_exec: LWEToGLWESwitchingKeyExec<Vec<u8>, B> = LWEToGLWESwitchingKeyExec::from(module, &ksk, scratch.borrow());
+    let ksk_prepared: LWEToGLWESwitchingKeyPrepared<Vec<u8>, B> = ksk.prepare_alloc(module, scratch.borrow());
 
-    glwe_ct.from_lwe(module, &lwe_ct, &ksk_exec, scratch.borrow());
+    glwe_ct.from_lwe(module, &lwe_ct, &ksk_prepared, scratch.borrow());
 
     let mut glwe_pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k_glwe_ct);
-    glwe_ct.decrypt(module, &mut glwe_pt, &sk_glwe_exec, scratch.borrow());
+    glwe_ct.decrypt(module, &mut glwe_pt, &sk_glwe_prepared, scratch.borrow());
 
     assert_eq!(glwe_pt.data.at(0, 0)[0], lwe_pt.data.at(0, 0)[0]);
 }
@@ -118,11 +117,10 @@ where
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
         + GLWEKeyswitchFamily<B>
-        + VecZnxEncodeCoeffsi64
         + VecZnxAutomorphismInplace
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
-        + GLWESecretExecModuleFamily<B>,
+        + GLWESecretPreparedModuleFamily<B>,
     B: TakeScalarZnxImpl<B>
         + TakeVecZnxDftImpl<B>
         + ScratchAvailableImpl<B>
@@ -159,20 +157,20 @@ where
     let mut sk_glwe: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
     sk_glwe.fill_ternary_prob(0.5, &mut source_xs);
 
-    let sk_glwe_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_glwe);
+    let sk_glwe_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_glwe.prepare_alloc(module, scratch.borrow());
 
     let mut sk_lwe = LWESecret::alloc(n_lwe);
     sk_lwe.fill_ternary_prob(0.5, &mut source_xs);
 
     let data: i64 = 17;
     let mut glwe_pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k_glwe_ct);
-    module.encode_coeff_i64(basek, &mut glwe_pt.data, 0, k_lwe_pt, 0, data, k_lwe_pt);
+    glwe_pt.encode_coeff_i64(data, k_lwe_pt, 0);
 
     let mut glwe_ct = GLWECiphertext::alloc(n, basek, k_glwe_ct, rank);
     glwe_ct.encrypt_sk(
         module,
         &glwe_pt,
-        &sk_glwe_exec,
+        &sk_glwe_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
@@ -193,9 +191,9 @@ where
 
     let mut lwe_ct: LWECiphertext<Vec<u8>> = LWECiphertext::alloc(n_lwe, basek, k_lwe_ct);
 
-    let ksk_exec: GLWEToLWESwitchingKeyExec<Vec<u8>, B> = GLWEToLWESwitchingKeyExec::from(module, &ksk, scratch.borrow());
+    let ksk_prepared: GLWEToLWESwitchingKeyPrepared<Vec<u8>, B> = ksk.prepare_alloc(module, scratch.borrow());
 
-    lwe_ct.from_glwe(module, &glwe_ct, &ksk_exec, scratch.borrow());
+    lwe_ct.from_glwe(module, &glwe_ct, &ksk_prepared, scratch.borrow());
 
     let mut lwe_pt: LWEPlaintext<Vec<u8>> = LWEPlaintext::alloc(basek, k_lwe_ct);
     lwe_ct.decrypt(module, &mut lwe_pt, &sk_lwe);

core/src/tests/generics/encryption/gglwe_atk.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
         ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxAutomorphismInplace, VecZnxCopy,
-        VecZnxStd, VecZnxSubScalarInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
+        VecZnxSubScalarInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -12,11 +12,15 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    layouts::{GGLWEAutomorphismKey, GLWESecret, compressed::GGLWEAutomorphismKeyCompressed, prepared::GLWESecretExec},
+    layouts::{
+        GGLWEAutomorphismKey, GLWESecret,
+        compressed::GGLWEAutomorphismKeyCompressed,
+        prepared::{GLWESecretPrepared, PrepareAlloc},
+    },
     trait_families::{Decompress, GLWEDecryptFamily, GLWEKeyswitchFamily},
 };
 
-use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEAutomorphismKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_gglwe_automorphisk_key_encrypt_sk<B: Backend>(
     module: &Module<B>,
@@ -27,7 +31,7 @@ pub fn test_gglwe_automorphisk_key_encrypt_sk<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEKeyswitchFamily<B>
         + VecZnxAutomorphism
         + VecZnxSwithcDegree
@@ -36,7 +40,6 @@ pub fn test_gglwe_automorphisk_key_encrypt_sk<B: Backend>(
         + VecZnxAutomorphismInplace
         + GLWEDecryptFamily<B>
         + VecZnxSubScalarInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
@@ -87,11 +90,11 @@ pub fn test_gglwe_automorphisk_key_encrypt_sk<B: Backend>(
             i,
         );
     });
-    let sk_out_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_out);
+    let sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     atk.key
         .key
-        .assert_noise(module, &sk_out_exec, &sk.data, sigma);
+        .assert_noise(module, &sk_out_prepared, &sk.data, sigma);
 }
 
 pub fn test_gglwe_automorphisk_key_compressed_encrypt_sk<B: Backend>(
@@ -103,7 +106,7 @@ pub fn test_gglwe_automorphisk_key_compressed_encrypt_sk<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEAutomorphismKeyEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEKeyswitchFamily<B>
         + VecZnxAutomorphism
         + VecZnxSwithcDegree
@@ -112,7 +115,6 @@ pub fn test_gglwe_automorphisk_key_compressed_encrypt_sk<B: Backend>(
         + VecZnxAutomorphismInplace
         + GLWEDecryptFamily<B>
         + VecZnxSubScalarInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
@@ -165,12 +167,12 @@ pub fn test_gglwe_automorphisk_key_compressed_encrypt_sk<B: Backend>(
             i,
         );
     });
-    let sk_out_exec = GLWESecretExec::from(module, &sk_out);
+    let sk_out_prepared = sk_out.prepare_alloc(module, scratch.borrow());
 
     let mut atk: GGLWEAutomorphismKey<Vec<u8>> = GGLWEAutomorphismKey::alloc(n, basek, k_ksk, rows, digits, rank);
     atk.decompress(module, &atk_compressed);
 
     atk.key
         .key
-        .assert_noise(module, &sk_out_exec, &sk.data, sigma);
+        .assert_noise(module, &sk_out_prepared, &sk.data, sigma);
 }

core/src/tests/generics/encryption/gglwe_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxStd, VecZnxSubScalarInplace,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxSubScalarInplace, VecZnxSwithcDegree,
-        VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
+        VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -12,11 +12,15 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    layouts::{GLWESecret, GGLWESwitchingKey, compressed::GGLWESwitchingKeyCompressed, prepared::GLWESecretExec},
+    layouts::{
+        GGLWESwitchingKey, GLWESecret,
+        compressed::GGLWESwitchingKeyCompressed,
+        prepared::{GLWESecretPrepared, PrepareAlloc},
+    },
     trait_families::{Decompress, GLWEDecryptFamily},
 };
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_gglwe_switching_key_encrypt_sk<B: Backend>(
     module: &Module<B>,
@@ -28,11 +32,10 @@ pub fn test_gglwe_switching_key_encrypt_sk<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
-        + VecZnxStd
         + VecZnxSubScalarInplace
         + VecZnxCopy
         + VmpPMatAlloc<B>
@@ -67,7 +70,7 @@ pub fn test_gglwe_switching_key_encrypt_sk<B: Backend>(
 
     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 sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     ksk.encrypt_sk(
         module,
@@ -80,7 +83,7 @@ pub fn test_gglwe_switching_key_encrypt_sk<B: Backend>(
     );
 
     ksk.key
-        .assert_noise(module, &sk_out_exec, &sk_in.data, sigma);
+        .assert_noise(module, &sk_out_prepared, &sk_in.data, sigma);
 }
 
 pub fn test_gglwe_switching_key_compressed_encrypt_sk<B: Backend>(
@@ -93,11 +96,10 @@ pub fn test_gglwe_switching_key_compressed_encrypt_sk<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
-        + VecZnxStd
         + VecZnxSubScalarInplace
         + VecZnxCopy
         + VmpPMatAlloc<B>
@@ -132,7 +134,7 @@ pub fn test_gglwe_switching_key_compressed_encrypt_sk<B: Backend>(
 
     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 sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     let seed_xa = [1u8; 32];
 
@@ -150,5 +152,5 @@ pub fn test_gglwe_switching_key_compressed_encrypt_sk<B: Backend>(
     ksk.decompress(module, &ksk_compressed);
 
     ksk.key
-        .assert_noise(module, &sk_out_exec, &sk_in.data, sigma);
+        .assert_noise(module, &sk_out_prepared, &sk_in.data, sigma);
 }

core/src/tests/generics/encryption/ggsw_ct.rs

@@ -1,6 +1,6 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxStd, VecZnxSubABInplace, VmpPMatAlloc,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxSubABInplace, VmpPMatAlloc,
         VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScalarZnx, ScratchOwned},
@@ -12,20 +12,23 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    layouts::{GGSWCiphertext, GLWESecret, compressed::GGSWCiphertextCompressed, prepared::GLWESecretExec},
+    layouts::{
+        GGSWCiphertext, GLWESecret,
+        compressed::GGSWCiphertextCompressed,
+        prepared::{GLWESecretPrepared, PrepareAlloc},
+    },
     trait_families::{Decompress, GGSWAssertNoiseFamily},
 };
 
-use crate::trait_families::{GGSWEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGSWEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_ggsw_encrypt_sk<B: Backend>(module: &Module<B>, basek: usize, k: usize, digits: usize, rank: usize, sigma: f64)
 where
-    Module<B>: GLWESecretExecModuleFamily<B>
+    Module<B>: GLWESecretPreparedModuleFamily<B>
         + GGSWEncryptSkFamily<B>
         + GGSWAssertNoiseFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxSubABInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
@@ -60,13 +63,12 @@ where
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
-    sk_exec.prepare(module, &sk);
 
     ct.encrypt_sk(
         module,
         &pt_scalar,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
@@ -75,7 +77,7 @@ where
 
     let noise_f = |_col_i: usize| -(k as f64) + sigma.log2() + 0.5;
 
-    ct.assert_noise(module, &sk_exec, &pt_scalar, &noise_f);
+    ct.assert_noise(module, &sk_prepared, &pt_scalar, &noise_f);
 }
 
 pub fn test_ggsw_compressed_encrypt_sk<B: Backend>(
@@ -86,12 +88,11 @@ pub fn test_ggsw_compressed_encrypt_sk<B: Backend>(
     rank: usize,
     sigma: f64,
 ) where
-    Module<B>: GLWESecretExecModuleFamily<B>
+    Module<B>: GLWESecretPreparedModuleFamily<B>
         + GGSWEncryptSkFamily<B>
         + GGSWAssertNoiseFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxSubABInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
@@ -125,15 +126,14 @@ pub fn test_ggsw_compressed_encrypt_sk<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
-    sk_exec.prepare(module, &sk);
 
     let seed_xa: [u8; 32] = [1u8; 32];
 
     ct_compressed.encrypt_sk(
         module,
         &pt_scalar,
-        &sk_exec,
+        &sk_prepared,
         seed_xa,
         &mut source_xe,
         sigma,
@@ -145,5 +145,5 @@ pub fn test_ggsw_compressed_encrypt_sk<B: Backend>(
     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);
+    ct.assert_noise(module, &sk_prepared, &pt_scalar, &noise_f);
 }

core/src/tests/generics/encryption/glwe_ct.rs

@@ -1,5 +1,5 @@
 use backend::hal::{
-    api::{ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxCopy, VecZnxDftAlloc, VecZnxFillUniform, VecZnxStd, VecZnxSubABInplace},
+    api::{ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxCopy, VecZnxDftAlloc, VecZnxFillUniform, VecZnxSubABInplace},
     layouts::{Backend, Module, ScratchOwned},
     oep::{
         ScratchAvailableImpl, ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeScalarZnxImpl, TakeSvpPPolImpl,
@@ -12,16 +12,16 @@ use crate::{
     layouts::{
         GLWECiphertext, GLWEPlaintext, GLWEPublicKey, GLWESecret, Infos,
         compressed::GLWECiphertextCompressed,
-        prepared::{GLWEPublicKeyExec, GLWESecretExec},
+        prepared::{GLWEPublicKeyPrepared, GLWESecretPrepared, PrepareAlloc},
     },
     operations::GLWEOperations,
     trait_families::Decompress,
 };
 
-use crate::trait_families::{GLWEDecryptFamily, GLWEEncryptPkFamily, GLWEEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GLWEDecryptFamily, GLWEEncryptPkFamily, GLWEEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub trait EncryptionTestModuleFamily<B: Backend> =
-    GLWEDecryptFamily<B> + VecZnxStd + GLWESecretExecModuleFamily<B> + GLWEEncryptPkFamily<B>;
+    GLWEDecryptFamily<B> + GLWESecretPreparedModuleFamily<B> + GLWEEncryptPkFamily<B>;
 
 pub fn test_glwe_encrypt_sk<B: Backend>(module: &Module<B>, basek: usize, k_ct: usize, k_pt: usize, sigma: f64, rank: usize)
 where
@@ -51,25 +51,25 @@ where
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     module.vec_znx_fill_uniform(basek, &mut pt_want.data, 0, k_pt, &mut source_xa);
 
     ct.encrypt_sk(
         module,
         &pt_want,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    ct.decrypt(module, &mut pt_have, &sk_exec, scratch.borrow());
+    ct.decrypt(module, &mut pt_have, &sk_prepared, scratch.borrow());
 
     pt_want.sub_inplace_ab(module, &pt_have);
 
-    let noise_have: f64 = module.vec_znx_std(basek, &pt_want.data, 0) * (ct.k() as f64).exp2();
+    let noise_have: f64 = pt_want.data.std(basek, 0) * (ct.k() as f64).exp2();
     let noise_want: f64 = sigma;
 
     assert!(noise_have <= noise_want + 0.2);
@@ -110,7 +110,7 @@ pub fn test_glwe_compressed_encrypt_sk<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     module.vec_znx_fill_uniform(basek, &mut pt_want.data, 0, k_pt, &mut source_xa);
 
@@ -119,7 +119,7 @@ pub fn test_glwe_compressed_encrypt_sk<B: Backend>(
     ct_compressed.encrypt_sk(
         module,
         &pt_want,
-        &sk_exec,
+        &sk_prepared,
         seed_xa,
         &mut source_xe,
         sigma,
@@ -129,11 +129,11 @@ pub fn test_glwe_compressed_encrypt_sk<B: Backend>(
     let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_ct, rank);
     ct.decompress(module, &ct_compressed);
 
-    ct.decrypt(module, &mut pt_have, &sk_exec, scratch.borrow());
+    ct.decrypt(module, &mut pt_have, &sk_prepared, scratch.borrow());
 
     pt_want.sub_inplace_ab(module, &pt_have);
 
-    let noise_have: f64 = module.vec_znx_std(basek, &pt_want.data, 0) * (ct.k() as f64).exp2();
+    let noise_have: f64 = pt_want.data.std(basek, 0) * (ct.k() as f64).exp2();
     let noise_want: f64 = sigma;
 
     assert!(
@@ -163,28 +163,28 @@ where
     let mut source_xe: Source = Source::new([1u8; 32]);
     let mut source_xa: Source = Source::new([0u8; 32]);
 
-    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);
-
-    let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_ct, rank);
-
     let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
         GLWECiphertext::decrypt_scratch_space(module, n, basek, k_ct)
             | GLWECiphertext::encrypt_sk_scratch_space(module, n, basek, k_ct),
     );
 
+    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
+    sk.fill_ternary_prob(0.5, &mut source_xs);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
+
+    let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_ct, rank);
+
     ct.encrypt_zero_sk(
         module,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
-    ct.decrypt(module, &mut pt, &sk_exec, scratch.borrow());
+    ct.decrypt(module, &mut pt, &sk_prepared, scratch.borrow());
 
-    assert!((sigma - module.vec_znx_std(basek, &pt.data, 0) * (k_ct as f64).exp2()) <= 0.2);
+    assert!((sigma - pt.data.std(basek, 0) * (k_ct as f64).exp2()) <= 0.2);
 }
 
 pub fn test_glwe_encrypt_pk<B: Backend>(module: &Module<B>, basek: usize, k_ct: usize, k_pk: usize, sigma: f64, rank: usize)
@@ -210,38 +210,38 @@ where
     let mut source_xa: Source = Source::new([0u8; 32]);
     let mut source_xu: Source = Source::new([0u8; 32]);
 
-    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);
-
-    let mut pk: GLWEPublicKey<Vec<u8>> = GLWEPublicKey::alloc(n, basek, k_pk, rank);
-    pk.generate_from_sk(module, &sk_exec, &mut source_xa, &mut source_xe, sigma);
-
     let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
         GLWECiphertext::encrypt_sk_scratch_space(module, n, basek, ct.k())
             | GLWECiphertext::decrypt_scratch_space(module, n, basek, ct.k())
-            | GLWECiphertext::encrypt_pk_scratch_space(module, n, basek, pk.k()),
+            | GLWECiphertext::encrypt_pk_scratch_space(module, n, basek, k_pk),
     );
 
+    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
+    sk.fill_ternary_prob(0.5, &mut source_xs);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
+
+    let mut pk: GLWEPublicKey<Vec<u8>> = GLWEPublicKey::alloc(n, basek, k_pk, rank);
+    pk.generate_from_sk(module, &sk_prepared, &mut source_xa, &mut source_xe, sigma);
+
     module.vec_znx_fill_uniform(basek, &mut pt_want.data, 0, k_ct, &mut source_xa);
 
-    let pk_exec: GLWEPublicKeyExec<Vec<u8>, B> = GLWEPublicKeyExec::from(module, &pk, scratch.borrow());
+    let pk_prepared: GLWEPublicKeyPrepared<Vec<u8>, B> = pk.prepare_alloc(module, scratch.borrow());
 
     ct.encrypt_pk(
         module,
         &pt_want,
-        &pk_exec,
+        &pk_prepared,
         &mut source_xu,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    ct.decrypt(module, &mut pt_have, &sk_exec, scratch.borrow());
+    ct.decrypt(module, &mut pt_have, &sk_prepared, scratch.borrow());
 
     pt_want.sub_inplace_ab(module, &pt_have);
 
-    let noise_have: f64 = module.vec_znx_std(basek, &pt_want.data, 0).log2();
+    let noise_have: f64 = pt_want.data.std(basek, 0).log2();
     let noise_want: f64 = ((((rank as f64) + 1.0) * n as f64 * 0.5 * sigma * sigma).sqrt()).log2() - (k_ct as f64);
 
     assert!(

core/src/tests/generics/encryption/glwe_tsk.rs

@@ -1,6 +1,6 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxBigAlloc, VecZnxCopy, VecZnxDftAlloc, VecZnxStd,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxBigAlloc, VecZnxCopy, VecZnxDftAlloc,
         VecZnxSubScalarInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScratchOwned, VecZnxDft},
@@ -12,20 +12,23 @@ use backend::hal::{
 use sampling::source::Source;
 
 use crate::{
-    layouts::{GGLWETensorKey, GLWEPlaintext, GLWESecret, Infos, compressed::GGLWETensorKeyCompressed, prepared::GLWESecretExec},
+    layouts::{
+        GGLWETensorKey, GLWEPlaintext, GLWESecret, Infos,
+        compressed::GGLWETensorKeyCompressed,
+        prepared::{GLWESecretPrepared, PrepareAlloc},
+    },
     trait_families::{Decompress, GLWEDecryptFamily},
 };
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GGLWETensorKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWETensorKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_glwe_tensor_key_encrypt_sk<B: Backend>(module: &Module<B>, basek: usize, k: usize, sigma: f64, rank: usize)
 where
     Module<B>: GGLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
-        + VecZnxStd
         + VecZnxSubScalarInplace
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
@@ -64,8 +67,7 @@ where
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
-    sk_exec.prepare(module, &sk);
 
     tensor_key.encrypt_sk(
         module,
@@ -89,7 +91,7 @@ where
 
     (0..rank).for_each(|i| {
         (0..rank).for_each(|j| {
-            module.svp_apply(&mut sk_ij_dft, 0, &sk_exec.data, j, &sk_dft, i);
+            module.svp_apply(&mut sk_ij_dft, 0, &sk_prepared.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(
                 basek,
@@ -104,11 +106,11 @@ where
                     tensor_key
                         .at(i, j)
                         .at(row_i, col_i)
-                        .decrypt(module, &mut pt, &sk_exec, scratch.borrow());
+                        .decrypt(module, &mut pt, &sk_prepared, scratch.borrow());
 
                     module.vec_znx_sub_scalar_inplace(&mut pt.data, 0, row_i, &sk_ij.data, col_i);
 
-                    let std_pt: f64 = module.vec_znx_std(basek, &pt.data, 0) * (k as f64).exp2();
+                    let std_pt: f64 = pt.data.std(basek, 0) * (k as f64).exp2();
                     assert!((sigma - std_pt).abs() <= 0.5, "{} {}", sigma, std_pt);
                 });
             });
@@ -119,11 +121,10 @@ where
 pub fn test_glwe_tensor_key_compressed_encrypt_sk<B: Backend>(module: &Module<B>, basek: usize, k: usize, sigma: f64, rank: usize)
 where
     Module<B>: GGLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
-        + VecZnxStd
         + VecZnxSubScalarInplace
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
@@ -147,7 +148,8 @@ where
     let n: usize = module.n();
     let rows: usize = k / basek;
 
-    let mut tensor_key_compressed: GGLWETensorKeyCompressed<Vec<u8>> = GGLWETensorKeyCompressed::alloc(n, basek, k, rows, 1, rank);
+    let mut tensor_key_compressed: GGLWETensorKeyCompressed<Vec<u8>> =
+        GGLWETensorKeyCompressed::alloc(n, basek, k, rows, 1, rank);
 
     let mut source_xs: Source = Source::new([0u8; 32]);
     let mut source_xe: Source = Source::new([0u8; 32]);
@@ -162,8 +164,7 @@ where
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
-    sk_exec.prepare(module, &sk);
 
     let seed_xa: [u8; 32] = [1u8; 32];
 
@@ -192,7 +193,7 @@ where
 
     (0..rank).for_each(|i| {
         (0..rank).for_each(|j| {
-            module.svp_apply(&mut sk_ij_dft, 0, &sk_exec.data, j, &sk_dft, i);
+            module.svp_apply(&mut sk_ij_dft, 0, &sk_prepared.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(
                 basek,
@@ -207,11 +208,11 @@ where
                     tensor_key
                         .at(i, j)
                         .at(row_i, col_i)
-                        .decrypt(module, &mut pt, &sk_exec, scratch.borrow());
+                        .decrypt(module, &mut pt, &sk_prepared, scratch.borrow());
 
                     module.vec_znx_sub_scalar_inplace(&mut pt.data, 0, row_i, &sk_ij.data, col_i);
 
-                    let std_pt: f64 = module.vec_znx_std(basek, &pt.data, 0) * (k as f64).exp2();
+                    let std_pt: f64 = pt.data.std(basek, 0) * (k as f64).exp2();
                     assert!((sigma - std_pt).abs() <= 0.5, "{} {}", sigma, std_pt);
                 });
             });

core/src/tests/generics/external_product/gglwe_ksk.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxRotateInplace, VecZnxStd,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxRotateInplace, VecZnxSubScalarInplace,
-        VecZnxSubScalarInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare, ZnxViewMut,
+        VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare, ZnxViewMut,
     },
     layouts::{Backend, Module, ScalarZnx, ScalarZnxToMut, ScratchOwned},
     oep::{
@@ -13,14 +13,14 @@ use sampling::source::Source;
 
 use crate::{
     layouts::{
-        GGSWCiphertext, GLWESecret, GGLWESwitchingKey,
+        GGLWESwitchingKey, GGSWCiphertext, GLWESecret,
-        prepared::{GGSWCiphertextExec, GLWESecretExec},
+        prepared::{GGSWCiphertextPrepared, GLWESecretPrepared, PrepareAlloc},
     },
     noise::noise_ggsw_product,
     trait_families::{GLWEDecryptFamily, GLWEExternalProductFamily},
 };
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_gglwe_switching_key_external_product<B: Backend>(
     module: &Module<B>,
@@ -34,11 +34,10 @@ pub fn test_gglwe_switching_key_external_product<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
-        + VecZnxStd
         + VecZnxSubScalarInplace
         + VecZnxCopy
         + VmpPMatAlloc<B>
@@ -63,7 +62,8 @@ pub fn test_gglwe_switching_key_external_product<B: Backend>(
     let rows: usize = k_in.div_ceil(basek * digits);
     let digits_in: usize = 1;
 
-    let mut ct_gglwe_in: GGLWESwitchingKey<Vec<u8>> = GGLWESwitchingKey::alloc(n, basek, k_in, rows, digits_in, rank_in, rank_out);
+    let mut ct_gglwe_in: GGLWESwitchingKey<Vec<u8>> =
+        GGLWESwitchingKey::alloc(n, basek, k_in, rows, digits_in, rank_in, rank_out);
     let mut ct_gglwe_out: GGLWESwitchingKey<Vec<u8>> =
         GGLWESwitchingKey::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);
@@ -91,7 +91,7 @@ pub fn test_gglwe_switching_key_external_product<B: Backend>(
 
     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);
+    let sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     // gglwe_{s1}(s0) = s0 -> s1
     ct_gglwe_in.encrypt_sk(
@@ -107,20 +107,17 @@ pub fn test_gglwe_switching_key_external_product<B: Backend>(
     ct_rgsw.encrypt_sk(
         module,
         &pt_rgsw,
-        &sk_out_exec,
+        &sk_out_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let mut ct_rgsw_exec: GGSWCiphertextExec<Vec<u8>, B> =
+    let ct_rgsw_prepared: GGSWCiphertextPrepared<Vec<u8>, B> = ct_rgsw.prepare_alloc(module, scratch.borrow());
-        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());
+    ct_gglwe_out.external_product(module, &ct_gglwe_in, &ct_rgsw_prepared, 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}
@@ -149,7 +146,7 @@ pub fn test_gglwe_switching_key_external_product<B: Backend>(
 
     ct_gglwe_out
         .key
-        .assert_noise(module, &sk_out_exec, &sk_in.data, max_noise + 0.5);
+        .assert_noise(module, &sk_out_prepared, &sk_in.data, max_noise + 0.5);
 }
 
 pub fn test_gglwe_switching_key_external_product_inplace<B: Backend>(
@@ -163,11 +160,10 @@ pub fn test_gglwe_switching_key_external_product_inplace<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
-        + VecZnxStd
         + VecZnxSubScalarInplace
         + VecZnxCopy
         + VmpPMatAlloc<B>
@@ -219,7 +215,7 @@ pub fn test_gglwe_switching_key_external_product_inplace<B: Backend>(
 
     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);
+    let sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     // gglwe_{s1}(s0) = s0 -> s1
     ct_gglwe.encrypt_sk(
@@ -235,20 +231,17 @@ pub fn test_gglwe_switching_key_external_product_inplace<B: Backend>(
     ct_rgsw.encrypt_sk(
         module,
         &pt_rgsw,
-        &sk_out_exec,
+        &sk_out_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let mut ct_rgsw_exec: GGSWCiphertextExec<Vec<u8>, B> =
+    let ct_rgsw_prepared: GGSWCiphertextPrepared<Vec<u8>, B> = ct_rgsw.prepare_alloc(module, scratch.borrow());
-        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());
+    ct_gglwe.external_product_inplace(module, &ct_rgsw_prepared, 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}
@@ -277,5 +270,5 @@ pub fn test_gglwe_switching_key_external_product_inplace<B: Backend>(
 
     ct_gglwe
         .key
-        .assert_noise(module, &sk_out_exec, &sk_in.data, max_noise + 0.5);
+        .assert_noise(module, &sk_out_prepared, &sk_in.data, max_noise + 0.5);
 }

core/src/tests/generics/external_product/ggsw_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxRotateInplace, VecZnxStd,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxRotateInplace, VecZnxSubABInplace,
-        VecZnxSubABInplace, VmpPMatAlloc, VmpPMatPrepare, ZnxViewMut,
+        VmpPMatAlloc, VmpPMatPrepare, ZnxViewMut,
     },
     layouts::{Backend, Module, ScalarZnx, ScalarZnxToMut, ScratchOwned},
     oep::{
@@ -14,7 +14,7 @@ use sampling::source::Source;
 use crate::{
     layouts::{
         GGSWCiphertext, GLWESecret,
-        prepared::{GGSWCiphertextExec, GLWESecretExec},
+        prepared::{GGSWCiphertextPrepared, GLWESecretPrepared, PrepareAlloc},
     },
     noise::noise_ggsw_product,
     trait_families::GGSWAssertNoiseFamily,
@@ -22,7 +22,7 @@ use crate::{
 
 use crate::trait_families::{
     GGLWESwitchingKeyEncryptSkFamily, GGLWETensorKeyEncryptSkFamily, GGSWEncryptSkFamily, GGSWKeySwitchFamily,
-    GLWESecretExecModuleFamily,
+    GLWESecretPreparedModuleFamily,
 };
 
 pub fn test_ggsw_external_product<B: Backend>(
@@ -35,12 +35,11 @@ pub fn test_ggsw_external_product<B: Backend>(
     rank: usize,
     sigma: f64,
 ) where
-    Module<B>: GLWESecretExecModuleFamily<B>
+    Module<B>: GLWESecretPreparedModuleFamily<B>
         + GGSWEncryptSkFamily<B>
         + GGSWAssertNoiseFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxSubABInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
@@ -89,12 +88,12 @@ pub fn test_ggsw_external_product<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     ct_ggsw_rhs.encrypt_sk(
         module,
         &pt_ggsw_rhs,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
@@ -104,17 +103,16 @@ pub fn test_ggsw_external_product<B: Backend>(
     ct_ggsw_lhs_in.encrypt_sk(
         module,
         &pt_ggsw_lhs,
-        &sk_exec,
+        &sk_prepared,
         &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);
+    let ct_rhs_prepared: GGSWCiphertextPrepared<Vec<u8>, B> = ct_ggsw_rhs.prepare_alloc(module, scratch.borrow());
-    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());
+    ct_ggsw_lhs_out.external_product(module, &ct_ggsw_lhs_in, &ct_rhs_prepared, scratch.borrow());
 
     module.vec_znx_rotate_inplace(k as i64, &mut pt_ggsw_lhs.as_vec_znx_mut(), 0);
 
@@ -141,7 +139,7 @@ pub fn test_ggsw_external_product<B: Backend>(
         ) + 0.5
     };
 
-    ct_ggsw_lhs_out.assert_noise(module, &sk_exec, &pt_ggsw_lhs, &max_noise);
+    ct_ggsw_lhs_out.assert_noise(module, &sk_prepared, &pt_ggsw_lhs, &max_noise);
 }
 
 pub fn test_ggsw_external_product_inplace<B: Backend>(
@@ -153,12 +151,11 @@ pub fn test_ggsw_external_product_inplace<B: Backend>(
     rank: usize,
     sigma: f64,
 ) where
-    Module<B>: GLWESecretExecModuleFamily<B>
+    Module<B>: GLWESecretPreparedModuleFamily<B>
         + GGSWEncryptSkFamily<B>
         + GGSWAssertNoiseFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxSubABInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
@@ -207,12 +204,12 @@ pub fn test_ggsw_external_product_inplace<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     ct_ggsw_rhs.encrypt_sk(
         module,
         &pt_ggsw_rhs,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
@@ -222,17 +219,16 @@ pub fn test_ggsw_external_product_inplace<B: Backend>(
     ct_ggsw_lhs.encrypt_sk(
         module,
         &pt_ggsw_lhs,
-        &sk_exec,
+        &sk_prepared,
         &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);
+    let ct_rhs_prepared: GGSWCiphertextPrepared<Vec<u8>, B> = ct_ggsw_rhs.prepare_alloc(module, scratch.borrow());
-    ct_rhs_exec.prepare(module, &ct_ggsw_rhs, scratch.borrow());
 
-    ct_ggsw_lhs.external_product_inplace(module, &ct_rhs_exec, scratch.borrow());
+    ct_ggsw_lhs.external_product_inplace(module, &ct_rhs_prepared, scratch.borrow());
 
     module.vec_znx_rotate_inplace(k as i64, &mut pt_ggsw_lhs.as_vec_znx_mut(), 0);
 
@@ -259,5 +255,5 @@ pub fn test_ggsw_external_product_inplace<B: Backend>(
         ) + 0.5
     };
 
-    ct_ggsw_lhs.assert_noise(module, &sk_exec, &pt_ggsw_lhs, &max_noise);
+    ct_ggsw_lhs.assert_noise(module, &sk_prepared, &pt_ggsw_lhs, &max_noise);
 }

core/src/tests/generics/external_product/glwe_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxFillUniform, VecZnxRotateInplace, VecZnxStd,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxFillUniform, VecZnxRotateInplace, VmpPMatAlloc,
-        VmpPMatAlloc, VmpPMatPrepare, ZnxViewMut,
+        VmpPMatPrepare, ZnxViewMut,
     },
     layouts::{Backend, Module, ScalarZnx, ScratchOwned},
     oep::{
@@ -14,12 +14,12 @@ use sampling::source::Source;
 use crate::{
     layouts::{
         GGSWCiphertext, GLWECiphertext, GLWEPlaintext, GLWESecret, Infos,
-        prepared::{GGSWCiphertextExec, GLWESecretExec},
+        prepared::{GGSWCiphertextPrepared, GLWESecretPrepared, PrepareAlloc},
     },
     noise::noise_ggsw_product,
 };
 
-use crate::trait_families::{GLWEDecryptFamily, GLWEEncryptSkFamily, GLWEExternalProductFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GLWEDecryptFamily, GLWEEncryptSkFamily, GLWEExternalProductFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_glwe_external_product<B: Backend>(
     module: &Module<B>,
@@ -32,12 +32,11 @@ pub fn test_glwe_external_product<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + GLWEExternalProductFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxRotateInplace
-        + VecZnxStd
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
     B: TakeVecZnxDftImpl<B>
@@ -88,12 +87,12 @@ pub fn test_glwe_external_product<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     ct_ggsw.encrypt_sk(
         module,
         &pt_rgsw,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
@@ -103,16 +102,16 @@ pub fn test_glwe_external_product<B: Backend>(
     ct_glwe_in.encrypt_sk(
         module,
         &pt_want,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let ct_ggsw_exec: GGSWCiphertextExec<Vec<u8>, B> = GGSWCiphertextExec::from(module, &ct_ggsw, scratch.borrow());
+    let ct_ggsw_prepared: GGSWCiphertextPrepared<Vec<u8>, B> = ct_ggsw.prepare_alloc(module, scratch.borrow());
 
-    ct_glwe_out.external_product(module, &ct_glwe_in, &ct_ggsw_exec, scratch.borrow());
+    ct_glwe_out.external_product(module, &ct_glwe_in, &ct_ggsw_prepared, scratch.borrow());
 
     module.vec_znx_rotate_inplace(k as i64, &mut pt_want.data, 0);
 
@@ -137,7 +136,7 @@ pub fn test_glwe_external_product<B: Backend>(
         k_ggsw,
     );
 
-    ct_glwe_out.assert_noise(module, &sk_exec, &pt_want, max_noise + 0.5);
+    ct_glwe_out.assert_noise(module, &sk_prepared, &pt_want, max_noise + 0.5);
 }
 
 pub fn test_glwe_external_product_inplace<B: Backend>(
@@ -150,12 +149,11 @@ pub fn test_glwe_external_product_inplace<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + GLWEExternalProductFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxRotateInplace
-        + VecZnxStd
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>,
     B: TakeVecZnxDftImpl<B>
@@ -196,12 +194,12 @@ pub fn test_glwe_external_product_inplace<B: Backend>(
 
     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);
+    let sk_prepared: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     ct_ggsw.encrypt_sk(
         module,
         &pt_rgsw,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
@@ -211,16 +209,16 @@ pub fn test_glwe_external_product_inplace<B: Backend>(
     ct_glwe.encrypt_sk(
         module,
         &pt_want,
-        &sk_exec,
+        &sk_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let ct_ggsw_exec: GGSWCiphertextExec<Vec<u8>, B> = GGSWCiphertextExec::from(module, &ct_ggsw, scratch.borrow());
+    let ct_ggsw_prepared: GGSWCiphertextPrepared<Vec<u8>, B> = ct_ggsw.prepare_alloc(module, scratch.borrow());
 
-    ct_glwe.external_product_inplace(module, &ct_ggsw_exec, scratch.borrow());
+    ct_glwe.external_product_inplace(module, &ct_ggsw_prepared, scratch.borrow());
 
     module.vec_znx_rotate_inplace(k as i64, &mut pt_want.data, 0);
 
@@ -245,5 +243,5 @@ pub fn test_glwe_external_product_inplace<B: Backend>(
         k_ggsw,
     );
 
-    ct_glwe.assert_noise(module, &sk_exec, &pt_want, max_noise + 0.5);
+    ct_glwe.assert_noise(module, &sk_prepared, &pt_want, max_noise + 0.5);
 }

core/src/tests/generics/keyswitch/gglwe_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxStd, VecZnxSubScalarInplace,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxSubScalarInplace, VecZnxSwithcDegree,
-        VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
+        VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -13,14 +13,14 @@ use sampling::source::Source;
 
 use crate::{
     layouts::{
-        GLWESecret, GGLWESwitchingKey,
+        GGLWESwitchingKey, GLWESecret,
-        prepared::{GLWESecretExec, GGLWESwitchingKeyExec},
+        prepared::{GGLWESwitchingKeyPrepared, GLWESecretPrepared, PrepareAlloc},
     },
     noise::log2_std_noise_gglwe_product,
     trait_families::{GLWEDecryptFamily, GLWEKeyswitchFamily},
 };
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_gglwe_switching_key_keyswitch<B: Backend>(
     module: &Module<B>,
@@ -35,11 +35,10 @@ pub fn test_gglwe_switching_key_keyswitch<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
-        + VecZnxStd
         + VecZnxSubScalarInplace
         + VecZnxCopy
         + VmpPMatAlloc<B>
@@ -109,7 +108,7 @@ pub fn test_gglwe_switching_key_keyswitch<B: Backend>(
 
     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);
+    let sk2_prepared: GLWESecretPrepared<Vec<u8>, B> = sk2.prepare_alloc(module, scratch_apply.borrow());
 
     // gglwe_{s1}(s0) = s0 -> s1
     ct_gglwe_s0s1.encrypt_sk(
@@ -133,14 +132,14 @@ pub fn test_gglwe_switching_key_keyswitch<B: Backend>(
         scratch_enc.borrow(),
     );
 
-    let ct_gglwe_s1s2_exec: GGLWESwitchingKeyExec<Vec<u8>, B> =
+    let ct_gglwe_s1s2_prepared: GGLWESwitchingKeyPrepared<Vec<u8>, B> =
-        GGLWESwitchingKeyExec::from(module, &ct_gglwe_s1s2, scratch_apply.borrow());
+        ct_gglwe_s1s2.prepare_alloc(module, 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,
+        &ct_gglwe_s1s2_prepared,
         scratch_apply.borrow(),
     );
 
@@ -159,7 +158,7 @@ pub fn test_gglwe_switching_key_keyswitch<B: Backend>(
 
     ct_gglwe_s0s2
         .key
-        .assert_noise(module, &sk2_exec, &sk0.data, max_noise + 0.5);
+        .assert_noise(module, &sk2_prepared, &sk0.data, max_noise + 0.5);
 }
 
 pub fn test_gglwe_switching_key_keyswitch_inplace<B: Backend>(
@@ -173,11 +172,10 @@ pub fn test_gglwe_switching_key_keyswitch_inplace<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWEEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEDecryptFamily<B>
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
-        + VecZnxStd
         + VecZnxSubScalarInplace
         + VecZnxCopy
         + VmpPMatAlloc<B>
@@ -203,7 +201,8 @@ pub fn test_gglwe_switching_key_keyswitch_inplace<B: Backend>(
 
     let mut ct_gglwe_s0s1: GGLWESwitchingKey<Vec<u8>> =
         GGLWESwitchingKey::alloc(n, basek, k_ct, rows, digits_in, rank_in, rank_out);
-    let mut ct_gglwe_s1s2: GGLWESwitchingKey<Vec<u8>> = GGLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank_out, rank_out);
+    let mut ct_gglwe_s1s2: GGLWESwitchingKey<Vec<u8>> =
+        GGLWESwitchingKey::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]);
@@ -231,7 +230,7 @@ pub fn test_gglwe_switching_key_keyswitch_inplace<B: Backend>(
 
     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);
+    let sk2_prepared: GLWESecretPrepared<Vec<u8>, B> = sk2.prepare_alloc(module, scratch_apply.borrow());
 
     // gglwe_{s1}(s0) = s0 -> s1
     ct_gglwe_s0s1.encrypt_sk(
@@ -255,11 +254,11 @@ pub fn test_gglwe_switching_key_keyswitch_inplace<B: Backend>(
         scratch_enc.borrow(),
     );
 
-    let ct_gglwe_s1s2_exec: GGLWESwitchingKeyExec<Vec<u8>, B> =
+    let ct_gglwe_s1s2_prepared: GGLWESwitchingKeyPrepared<Vec<u8>, B> =
-        GGLWESwitchingKeyExec::from(module, &ct_gglwe_s1s2, scratch_apply.borrow());
+        ct_gglwe_s1s2.prepare_alloc(module, 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());
+    ct_gglwe_s0s1.keyswitch_inplace(module, &ct_gglwe_s1s2_prepared, scratch_apply.borrow());
 
     let ct_gglwe_s0s2: GGLWESwitchingKey<Vec<u8>> = ct_gglwe_s0s1;
 
@@ -278,5 +277,5 @@ pub fn test_gglwe_switching_key_keyswitch_inplace<B: Backend>(
 
     ct_gglwe_s0s2
         .key
-        .assert_noise(module, &sk2_exec, &sk0.data, max_noise + 0.5);
+        .assert_noise(module, &sk2_prepared, &sk0.data, max_noise + 0.5);
 }

core/src/tests/generics/keyswitch/ggsw_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxStd, VecZnxSubABInplace,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxCopy, VecZnxSubABInplace, VecZnxSwithcDegree,
-        VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
+        VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScalarZnx, ScratchOwned},
     oep::{
@@ -13,8 +13,8 @@ use sampling::source::Source;
 
 use crate::{
     layouts::{
-        GGLWETensorKey, GGSWCiphertext, GLWESecret, GGLWESwitchingKey,
+        GGLWESwitchingKey, GGLWETensorKey, GGSWCiphertext, GLWESecret,
-        prepared::{GLWESecretExec, GGLWESwitchingKeyExec, GGLWETensorKeyExec},
+        prepared::{GGLWESwitchingKeyPrepared, GGLWETensorKeyPrepared, GLWESecretPrepared, PrepareAlloc},
     },
     noise::noise_ggsw_keyswitch,
     trait_families::GGSWAssertNoiseFamily,
@@ -22,7 +22,7 @@ use crate::{
 
 use crate::trait_families::{
     GGLWESwitchingKeyEncryptSkFamily, GGLWETensorKeyEncryptSkFamily, GGSWEncryptSkFamily, GGSWKeySwitchFamily,
-    GLWESecretExecModuleFamily,
+    GLWESecretPreparedModuleFamily,
 };
 
 pub fn test_ggsw_keyswitch<B: Backend>(
@@ -36,12 +36,11 @@ pub fn test_ggsw_keyswitch<B: Backend>(
     rank: usize,
     sigma: f64,
 ) where
-    Module<B>: GLWESecretExecModuleFamily<B>
+    Module<B>: GLWESecretPreparedModuleFamily<B>
         + GGSWEncryptSkFamily<B>
         + GGSWAssertNoiseFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxSubABInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
@@ -93,11 +92,11 @@ pub fn test_ggsw_keyswitch<B: Backend>(
 
     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 sk_in_dft: GLWESecretPrepared<Vec<u8>, B> = sk_in.prepare_alloc(module, scratch.borrow());
 
     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);
+    let sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     ksk.encrypt_sk(
         module,
@@ -129,14 +128,16 @@ pub fn test_ggsw_keyswitch<B: Backend>(
         scratch.borrow(),
     );
 
-    let mut ksk_exec: GGLWESwitchingKeyExec<Vec<u8>, B> =
+    let ksk_prepared: GGLWESwitchingKeyPrepared<Vec<u8>, B> = ksk.prepare_alloc(module, scratch.borrow());
-        GGLWESwitchingKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank, rank);
+    let tsk_prepared: GGLWETensorKeyPrepared<Vec<u8>, B> = tsk.prepare_alloc(module, scratch.borrow());
-    let mut tsk_exec: GGLWETensorKeyExec<Vec<u8>, B> = GGLWETensorKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
 
-    ksk_exec.prepare(module, &ksk, scratch.borrow());
+    ct_out.keyswitch(
-    tsk_exec.prepare(module, &tsk, scratch.borrow());
+        module,
-
+        &ct_in,
-    ct_out.keyswitch(module, &ct_in, &ksk_exec, &tsk_exec, scratch.borrow());
+        &ksk_prepared,
+        &tsk_prepared,
+        scratch.borrow(),
+    );
 
     let max_noise = |col_j: usize| -> f64 {
         noise_ggsw_keyswitch(
@@ -154,7 +155,7 @@ pub fn test_ggsw_keyswitch<B: Backend>(
         ) + 0.5
     };
 
-    ct_out.assert_noise(module, &sk_out_exec, &pt_scalar, &max_noise);
+    ct_out.assert_noise(module, &sk_out_prepared, &pt_scalar, &max_noise);
 }
 
 pub fn test_ggsw_keyswitch_inplace<B: Backend>(
@@ -167,12 +168,11 @@ pub fn test_ggsw_keyswitch_inplace<B: Backend>(
     rank: usize,
     sigma: f64,
 ) where
-    Module<B>: GLWESecretExecModuleFamily<B>
+    Module<B>: GLWESecretPreparedModuleFamily<B>
         + GGSWEncryptSkFamily<B>
         + GGSWAssertNoiseFamily<B>
         + VecZnxAddScalarInplace
         + VecZnxSubABInplace
-        + VecZnxStd
         + VecZnxCopy
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
@@ -218,11 +218,11 @@ pub fn test_ggsw_keyswitch_inplace<B: Backend>(
 
     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 sk_in_dft: GLWESecretPrepared<Vec<u8>, B> = sk_in.prepare_alloc(module, scratch.borrow());
 
     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);
+    let sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     ksk.encrypt_sk(
         module,
@@ -254,14 +254,10 @@ pub fn test_ggsw_keyswitch_inplace<B: Backend>(
         scratch.borrow(),
     );
 
-    let mut ksk_exec: GGLWESwitchingKeyExec<Vec<u8>, B> =
+    let ksk_prepared: GGLWESwitchingKeyPrepared<Vec<u8>, B> = ksk.prepare_alloc(module, scratch.borrow());
-        GGLWESwitchingKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank, rank);
+    let tsk_prepared: GGLWETensorKeyPrepared<Vec<u8>, B> = tsk.prepare_alloc(module, scratch.borrow());
-    let mut tsk_exec: GGLWETensorKeyExec<Vec<u8>, B> = GGLWETensorKeyExec::alloc(module, n, basek, k_ksk, rows, digits, rank);
 
-    ksk_exec.prepare(module, &ksk, scratch.borrow());
+    ct.keyswitch_inplace(module, &ksk_prepared, &tsk_prepared, 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(
@@ -279,5 +275,5 @@ pub fn test_ggsw_keyswitch_inplace<B: Backend>(
         ) + 0.5
     };
 
-    ct.assert_noise(module, &sk_out_exec, &pt_scalar, &max_noise);
+    ct.assert_noise(module, &sk_out_prepared, &pt_scalar, &max_noise);
 }

core/src/tests/generics/keyswitch/glwe_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxFillUniform, VecZnxStd, VecZnxSwithcDegree,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxFillUniform, VecZnxSwithcDegree, VmpPMatAlloc,
-        VmpPMatAlloc, VmpPMatPrepare,
+        VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -13,14 +13,14 @@ use sampling::source::Source;
 
 use crate::{
     layouts::{
-        GLWECiphertext, GLWEPlaintext, GLWESecret, GGLWESwitchingKey, Infos,
+        GGLWESwitchingKey, GLWECiphertext, GLWEPlaintext, GLWESecret, Infos,
-        prepared::{GLWESecretExec, GGLWESwitchingKeyExec},
+        prepared::{GGLWESwitchingKeyPrepared, GLWESecretPrepared, PrepareAlloc},
     },
     noise::log2_std_noise_gglwe_product,
     trait_families::{GLWEDecryptFamily, GLWEKeyswitchFamily},
 };
 
-use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_glwe_keyswitch<B: Backend>(
     module: &Module<B>,
@@ -34,10 +34,9 @@ pub fn test_glwe_keyswitch<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWESwitchingKeyEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEKeyswitchFamily<B>
         + GLWEDecryptFamily<B>
-        + VecZnxStd
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
         + VmpPMatAlloc<B>
@@ -83,11 +82,11 @@ pub fn test_glwe_keyswitch<B: Backend>(
 
     let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in);
     sk_in.fill_ternary_prob(0.5, &mut source_xs);
-    let sk_in_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_in);
+    let sk_in_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_in.prepare_alloc(module, scratch.borrow());
 
     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 sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     ksk.encrypt_sk(
         module,
@@ -102,16 +101,16 @@ pub fn test_glwe_keyswitch<B: Backend>(
     ct_in.encrypt_sk(
         module,
         &pt_want,
-        &sk_in_exec,
+        &sk_in_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let ksk_exec: GGLWESwitchingKeyExec<Vec<u8>, B> = GGLWESwitchingKeyExec::from(module, &ksk, scratch.borrow());
+    let ksk_prepared: GGLWESwitchingKeyPrepared<Vec<u8>, B> = ksk.prepare_alloc(module, scratch.borrow());
 
-    ct_out.keyswitch(module, &ct_in, &ksk_exec, scratch.borrow());
+    ct_out.keyswitch(module, &ct_in, &ksk_prepared, scratch.borrow());
 
     let max_noise: f64 = log2_std_noise_gglwe_product(
         module.n() as f64,
@@ -126,7 +125,7 @@ pub fn test_glwe_keyswitch<B: Backend>(
         k_ksk,
     );
 
-    ct_out.assert_noise(module, &sk_out_exec, &pt_want, max_noise + 0.5);
+    ct_out.assert_noise(module, &sk_out_prepared, &pt_want, max_noise + 0.5);
 }
 
 pub fn test_glwe_keyswitch_inplace<B: Backend>(
@@ -139,10 +138,9 @@ pub fn test_glwe_keyswitch_inplace<B: Backend>(
     sigma: f64,
 ) where
     Module<B>: GGLWESwitchingKeyEncryptSkFamily<B>
-        + GLWESecretExecModuleFamily<B>
+        + GLWESecretPreparedModuleFamily<B>
         + GLWEKeyswitchFamily<B>
         + GLWEDecryptFamily<B>
-        + VecZnxStd
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
         + VmpPMatAlloc<B>
@@ -177,11 +175,11 @@ pub fn test_glwe_keyswitch_inplace<B: Backend>(
 
     let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
     sk_in.fill_ternary_prob(0.5, &mut source_xs);
-    let sk_in_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_in);
+    let sk_in_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_in.prepare_alloc(module, scratch.borrow());
 
     let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
     sk_out.fill_ternary_prob(0.5, &mut source_xs);
-    let sk_out_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk_out);
+    let sk_out_prepared: GLWESecretPrepared<Vec<u8>, B> = sk_out.prepare_alloc(module, scratch.borrow());
 
     ksk.encrypt_sk(
         module,
@@ -196,16 +194,16 @@ pub fn test_glwe_keyswitch_inplace<B: Backend>(
     ct_glwe.encrypt_sk(
         module,
         &pt_want,
-        &sk_in_exec,
+        &sk_in_prepared,
         &mut source_xa,
         &mut source_xe,
         sigma,
         scratch.borrow(),
     );
 
-    let ksk_exec: GGLWESwitchingKeyExec<Vec<u8>, B> = GGLWESwitchingKeyExec::from(module, &ksk, scratch.borrow());
+    let ksk_prepared: GGLWESwitchingKeyPrepared<Vec<u8>, B> = ksk.prepare_alloc(module, scratch.borrow());
 
-    ct_glwe.keyswitch_inplace(module, &ksk_exec, scratch.borrow());
+    ct_glwe.keyswitch_inplace(module, &ksk_prepared, scratch.borrow());
 
     let max_noise: f64 = log2_std_noise_gglwe_product(
         module.n() as f64,
@@ -220,5 +218,5 @@ pub fn test_glwe_keyswitch_inplace<B: Backend>(
         k_ksk,
     );
 
-    ct_glwe.assert_noise(module, &sk_out_exec, &pt_want, max_noise + 0.5);
+    ct_glwe.assert_noise(module, &sk_out_prepared, &pt_want, max_noise + 0.5);
 }

core/src/tests/generics/keyswitch/lwe_ct.rs

@@ -1,7 +1,7 @@
 use backend::hal::{
     api::{
-        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphismInplace, VecZnxEncodeCoeffsi64,
+        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphismInplace, VecZnxSwithcDegree,
-        VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare, ZnxView,
+        VmpPMatAlloc, VmpPMatPrepare, ZnxView,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -11,9 +11,12 @@ use backend::hal::{
 };
 use sampling::source::Source;
 
-use crate::layouts::{Infos, LWECiphertext, LWEPlaintext, LWESecret, LWESwitchingKey, prepared::LWESwitchingKeyExec};
+use crate::layouts::{
+    Infos, LWECiphertext, LWEPlaintext, LWESecret, LWESwitchingKey,
+    prepared::{LWESwitchingKeyPrepared, PrepareAlloc},
+};
 
-use crate::trait_families::{GGLWEEncryptSkFamily, GLWEDecryptFamily, GLWEKeyswitchFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWEEncryptSkFamily, GLWEDecryptFamily, GLWEKeyswitchFamily, GLWESecretPreparedModuleFamily};
 
 pub fn test_lwe_keyswitch<B: Backend>(module: &Module<B>)
 where
@@ -22,11 +25,10 @@ where
         + VecZnxSwithcDegree
         + VecZnxAddScalarInplace
         + GLWEKeyswitchFamily<B>
-        + VecZnxEncodeCoeffsi64
         + VecZnxAutomorphismInplace
         + VmpPMatAlloc<B>
         + VmpPMatPrepare<B>
-        + GLWESecretExecModuleFamily<B>,
+        + GLWESecretPreparedModuleFamily<B>,
     B: TakeScalarZnxImpl<B>
         + TakeVecZnxDftImpl<B>
         + ScratchAvailableImpl<B>
@@ -65,7 +67,8 @@ where
     let data: i64 = 17;
 
     let mut lwe_pt_in: LWEPlaintext<Vec<u8>> = LWEPlaintext::alloc(basek, k_lwe_pt);
-    module.encode_coeff_i64(basek, &mut lwe_pt_in.data, 0, k_lwe_pt, 0, data, k_lwe_pt);
+
+    lwe_pt_in.encode_i64(data, k_lwe_pt);
 
     let mut lwe_ct_in: LWECiphertext<Vec<u8>> = LWECiphertext::alloc(n_lwe_in, basek, k_lwe_ct);
     lwe_ct_in.encrypt_sk(
@@ -91,9 +94,9 @@ where
 
     let mut lwe_ct_out: LWECiphertext<Vec<u8>> = LWECiphertext::alloc(n_lwe_out, basek, k_lwe_ct);
 
-    let ksk_exec: LWESwitchingKeyExec<Vec<u8>, B> = LWESwitchingKeyExec::from(module, &ksk, scratch.borrow());
+    let ksk_prepared: LWESwitchingKeyPrepared<Vec<u8>, B> = ksk.prepare_alloc(module, scratch.borrow());
 
-    lwe_ct_out.keyswitch(module, &lwe_ct_in, &ksk_exec, scratch.borrow());
+    lwe_ct_out.keyswitch(module, &lwe_ct_in, &ksk_prepared, scratch.borrow());
 
     let mut lwe_pt_out: LWEPlaintext<Vec<u8>> = LWEPlaintext::alloc(basek, k_lwe_ct);
     lwe_ct_out.decrypt(module, &mut lwe_pt_out, &sk_lwe_out);

core/src/tests/generics/packing.rs

@@ -3,7 +3,7 @@ use std::collections::HashMap;
 use backend::hal::{
     api::{
         ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxBigSubSmallBInplace,
-        VecZnxEncodeVeci64, VecZnxRotateInplace, VecZnxStd, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
+        VecZnxRotateInplace, VecZnxSwithcDegree, VmpPMatAlloc, VmpPMatPrepare,
     },
     layouts::{Backend, Module, ScratchOwned},
     oep::{
@@ -17,22 +17,20 @@ use crate::{
     GLWEOperations, GLWEPacker,
     layouts::{
         GGLWEAutomorphismKey, GLWECiphertext, GLWEPlaintext, GLWESecret,
-        prepared::{GGLWEAutomorphismKeyExec, GLWESecretExec},
+        prepared::{GGLWEAutomorphismKeyPrepared, GLWESecretPrepared, PrepareAlloc},
     },
     trait_families::{GLWEDecryptFamily, GLWEKeyswitchFamily, GLWEPackingFamily},
 };
 
-use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretExecModuleFamily};
+use crate::trait_families::{GGLWESwitchingKeyEncryptSkFamily, GLWESecretPreparedModuleFamily};
 
 pub trait PackingTestModuleFamily<B: Backend> = GLWEPackingFamily<B>
-    + GLWESecretExecModuleFamily<B>
+    + GLWESecretPreparedModuleFamily<B>
     + GGLWESwitchingKeyEncryptSkFamily<B>
     + GLWEKeyswitchFamily<B>
     + GLWEDecryptFamily<B>
-    + VecZnxStd
     + VecZnxSwithcDegree
     + VecZnxAddScalarInplace
-    + VecZnxEncodeVeci64
     + VecZnxRotateInplace
     + VecZnxAutomorphism
     + VecZnxBigSubSmallBInplace<B>
@@ -76,7 +74,7 @@ where
 
     let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
     sk.fill_ternary_prob(0.5, &mut source_xs);
-    let sk_dft: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
+    let sk_dft: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
 
     let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k_ct);
     let mut data: Vec<i64> = vec![0i64; n];
@@ -84,11 +82,11 @@ where
         *x = i as i64;
     });
 
-    module.encode_vec_i64(basek, &mut pt.data, 0, pt_k, &data, 32);
+    pt.encode_vec_i64(&data, pt_k);
 
     let gal_els: Vec<i64> = GLWEPacker::galois_elements(module);
 
-    let mut auto_keys: HashMap<i64, GGLWEAutomorphismKeyExec<Vec<u8>, B>> = HashMap::new();
+    let mut auto_keys: HashMap<i64, GGLWEAutomorphismKeyPrepared<Vec<u8>, B>> = HashMap::new();
     let mut tmp: GGLWEAutomorphismKey<Vec<u8>> = GGLWEAutomorphismKey::alloc(n, basek, k_ksk, rows, digits, rank);
     gal_els.iter().for_each(|gal_el| {
         tmp.encrypt_sk(
@@ -100,8 +98,8 @@ where
             sigma,
             scratch.borrow(),
         );
-        let atk_exec: GGLWEAutomorphismKeyExec<Vec<u8>, B> = GGLWEAutomorphismKeyExec::from(module, &tmp, scratch.borrow());
+        let atk_prepared: GGLWEAutomorphismKeyPrepared<Vec<u8>, B> = tmp.prepare_alloc(module, scratch.borrow());
-        auto_keys.insert(*gal_el, atk_exec);
+        auto_keys.insert(*gal_el, atk_prepared);
     });
 
     let log_batch: usize = 0;
@@ -158,13 +156,13 @@ where
         }
     });
 
-    module.encode_vec_i64(basek, &mut pt_want.data, 0, pt_k, &data, 32);
+    pt_want.encode_vec_i64(&data, pt_k);
 
     res.decrypt(module, &mut pt, &sk_dft, scratch.borrow());
 
     pt.sub_inplace_ab(module, &pt_want);
 
-    let noise_have: f64 = module.vec_znx_std(basek, &pt.data, 0).log2();
+    let noise_have: f64 = pt.std().log2();
     // println!("noise_have: {}", noise_have);
     assert!(
         noise_have < -((k_ct - basek) as f64),