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Update cross-base2k keyswitch routine & tests, + add GLWE cross base2k conversion test

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This commit is contained in:
Pro7ech
2025-11-17 16:48:52 +01:00
parent 923db5e715
commit a3264b8851
4 changed files with 150 additions and 108 deletions
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32
poulpy-core/src/tests/test_suite/conversion.rs
View File

@@ -6,9 +6,14 @@ use poulpy_hal::{
use rug::Float;
use crate::{
GLWEDecrypt, GLWEEncryptSk, GLWEFromLWE, GLWENoise, GLWENormalize, GLWEToLWESwitchingKeyEncryptSk, LWEDecrypt, LWEEncryptSk, LWEFromGLWE, LWEToGLWESwitchingKeyEncryptSk, SIGMA, ScratchTakeCore, layouts::{
Base2K, Degree, Dnum, GLWE, GLWELayout, GLWEPlaintext, GLWESecret, GLWESecretPreparedFactory, GLWEToLWEKey, GLWEToLWEKeyLayout, GLWEToLWEKeyPrepared, GLWEToLWEKeyPreparedFactory, LWE, LWEInfos, LWELayout, LWEPlaintext, LWESecret, LWEToGLWEKey, LWEToGLWEKeyLayout, LWEToGLWEKeyPrepared, LWEToGLWEKeyPreparedFactory, Rank, TorusPrecision, prepared::GLWESecretPrepared
}
GLWEDecrypt, GLWEEncryptSk, GLWEFromLWE, GLWENoise, GLWENormalize, GLWEToLWESwitchingKeyEncryptSk, LWEDecrypt, LWEEncryptSk,
LWEFromGLWE, LWEToGLWESwitchingKeyEncryptSk, SIGMA, ScratchTakeCore,
layouts::{
Base2K, Degree, Dnum, GLWE, GLWELayout, GLWEPlaintext, GLWESecret, GLWESecretPreparedFactory, GLWEToLWEKey,
GLWEToLWEKeyLayout, GLWEToLWEKeyPrepared, GLWEToLWEKeyPreparedFactory, LWE, LWEInfos, LWELayout, LWEPlaintext, LWESecret,
LWEToGLWEKey, LWEToGLWEKeyLayout, LWEToGLWEKeyPrepared, LWEToGLWEKeyPreparedFactory, Rank, TorusPrecision,
prepared::GLWESecretPrepared,
},
};
pub fn test_glwe_base2k_conversion<BE: Backend>(module: &Module<BE>)
@@ -70,15 +75,24 @@ where
);
let mut data: Vec<Float> = (0..module.n()).map(|_| Float::with_val(128, 0)).collect();
ct_in.data().decode_vec_float(ct_in.base2k().into(), 0, &mut data);
ct_in
.data()
.decode_vec_float(ct_in.base2k().into(), 0, &mut data);
ct_out.fill_uniform(ct_out.base2k().into(),&mut source_xa);
ct_out.fill_uniform(ct_out.base2k().into(), &mut source_xa);
module.glwe_normalize(&mut ct_out, &ct_in, scratch.borrow());
let mut data_conv: Vec<Float> = (0..module.n()).map(|_| Float::with_val(128, 0)).collect();
ct_out.data().decode_vec_float(ct_out.base2k().into(), 0, &mut data_conv);
ct_out.assert_noise(module, &sk_prep, &pt_out, -(ct_out.k().as_u32() as f64) + SIGMA.log2() + 0.5);
let mut data_conv: Vec<Float> = (0..module.n()).map(|_| Float::with_val(128, 0)).collect();
ct_out
.data()
.decode_vec_float(ct_out.base2k().into(), 0, &mut data_conv);
ct_out.assert_noise(
module,
&sk_prep,
&pt_out,
-(ct_out.k().as_u32() as f64) + SIGMA.log2() + 0.5,
);
}
}
}

1
poulpy-core/src/tests/test_suite/encryption/glwe_ct.rs
View File

@@ -92,7 +92,6 @@ where
let k_pt: usize = 30;
for rank in 1_usize..3 {
let n: usize = module.n();
let glwe_infos: GLWELayout = GLWELayout {

96
poulpy-core/src/tests/test_suite/keyswitch/glwe_ct.rs
View File

@@ -5,14 +5,15 @@ use poulpy_hal::{
};
use crate::{
GLWEEncryptSk, GLWEKeyswitch, GLWENoise, GLWESwitchingKeyEncryptSk, ScratchTakeCore,
GLWEEncryptSk, GLWEKeyswitch, GLWENoise, GLWENormalize, GLWESwitchingKeyEncryptSk, ScratchTakeCore,
encryption::SIGMA,
layouts::{
GLWE, GLWELayout, GLWEPlaintext, GLWESecret, GLWESecretPreparedFactory, GLWESwitchingKey, GLWESwitchingKeyLayout,
GLWESwitchingKeyPreparedFactory,
GLWESwitchingKeyPreparedFactory, LWEInfos,
prepared::{GLWESecretPrepared, GLWESwitchingKeyPrepared},
},
noise::log2_std_noise_gglwe_product,
var_noise_gglwe_product_v2,
};
#[allow(clippy::too_many_arguments)]
@@ -24,44 +25,46 @@ where
+ GLWEKeyswitch<BE>
+ GLWESecretPreparedFactory<BE>
+ GLWESwitchingKeyPreparedFactory<BE>
+ GLWENoise<BE>,
+ GLWENoise<BE>
+ GLWENormalize<BE>,
ScratchOwned<BE>: ScratchOwnedAlloc<BE> + ScratchOwnedBorrow<BE>,
Scratch<BE>: ScratchAvailable + ScratchTakeCore<BE>,
{
let base2k_glwe: usize = 12;
let base2k_gglwe: usize = 8;
let k_in: usize = 45;
let dsize: usize = k_in.div_ceil(base2k_gglwe);
let base2k_in: usize = 17;
let base2k_key: usize = 13;
let base2k_out: usize = 15;
let k_in: usize = 102;
let max_dsize: usize = k_in.div_ceil(base2k_key);
for rank_in in 1_usize..3 {
for rank_out in 1_usize..3 {
for di in 1_usize..dsize+1 {
let k_ksk: usize = k_in + base2k_gglwe * di;
for dsize in 1_usize..max_dsize + 1 {
let k_ksk: usize = k_in + base2k_key * dsize;
let k_out: usize = k_ksk; // better capture noise
let n: usize = module.n();
let dnum: usize = k_in.div_ceil(base2k_gglwe * dsize);
let dnum: usize = k_in.div_ceil(base2k_key * dsize);
let glwe_in_infos: GLWELayout = GLWELayout {
n: n.into(),
base2k: base2k_glwe.into(),
base2k: base2k_in.into(),
k: k_in.into(),
rank: rank_in.into(),
};
let glwe_out_infos: GLWELayout = GLWELayout {
n: n.into(),
base2k: base2k_glwe.into(),
base2k: base2k_out.into(),
k: k_out.into(),
rank: rank_out.into(),
};
let ksk: GLWESwitchingKeyLayout = GLWESwitchingKeyLayout {
n: n.into(),
base2k: base2k_gglwe.into(),
base2k: base2k_key.into(),
k: k_ksk.into(),
dnum: dnum.into(),
dsize: di.into(),
dsize: dsize.into(),
rank_in: rank_in.into(),
rank_out: rank_out.into(),
};
@@ -69,13 +72,14 @@ where
let mut ksk: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc_from_infos(&ksk);
let mut glwe_in: GLWE<Vec<u8>> = GLWE::alloc_from_infos(&glwe_in_infos);
let mut glwe_out: GLWE<Vec<u8>> = GLWE::alloc_from_infos(&glwe_out_infos);
let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_in_infos);
let mut pt_in: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_in_infos);
let mut pt_out: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_out_infos);
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]);
module.vec_znx_fill_uniform(base2k_glwe, &mut pt_want.data, 0, &mut source_xa);
module.vec_znx_fill_uniform(pt_in.base2k().into(), &mut pt_in.data, 0, &mut source_xa);
let mut scratch: ScratchOwned<BE> = ScratchOwned::alloc(
GLWESwitchingKey::encrypt_sk_tmp_bytes(module, &ksk)
@@ -106,7 +110,7 @@ where
glwe_in.encrypt_sk(
module,
&pt_want,
&pt_in,
&sk_in_prepared,
&mut source_xa,
&mut source_xe,
@@ -119,20 +123,25 @@ where
glwe_out.keyswitch(module, &glwe_in, &ksk_prepared, scratch.borrow());
let max_noise: f64 = log2_std_noise_gglwe_product(
let max_noise: f64 = var_noise_gglwe_product_v2(
module.n() as f64,
base2k_gglwe * dsize,
k_ksk,
dnum,
dsize,
base2k_key,
0.5,
0.5,
0f64,
SIGMA * SIGMA,
0f64,
rank_in as f64,
k_in,
k_ksk,
);
)
.sqrt()
.log2();
glwe_out.assert_noise(module, &sk_out_prepared, &pt_want, max_noise + 0.5);
module.glwe_normalize(&mut pt_out, &pt_in, scratch.borrow());
glwe_out.assert_noise(module, &sk_out_prepared, &pt_out, max_noise + 0.5);
}
}
}
@@ -150,30 +159,31 @@ where
ScratchOwned<BE>: ScratchOwnedAlloc<BE> + ScratchOwnedBorrow<BE>,
Scratch<BE>: ScratchAvailable + ScratchTakeCore<BE>,
{
let base2k: usize = 12;
let k_out: usize = 45;
let dsize: usize = k_out.div_ceil(base2k);
let base2k_out: usize = 17;
let base2k_key: usize = 13;
let k_out: usize = 102;
let max_dsize: usize = k_out.div_ceil(base2k_key);
for rank in 1_usize..3 {
for di in 1..dsize + 1 {
let k_ksk: usize = k_out + base2k * di;
for dsize in 1..max_dsize + 1 {
let k_ksk: usize = k_out + base2k_key * dsize;
let n: usize = module.n();
let dnum: usize = k_out.div_ceil(base2k * dsize);
let dnum: usize = k_out.div_ceil(base2k_key * dsize);
let glwe_out_infos: GLWELayout = GLWELayout {
n: n.into(),
base2k: base2k.into(),
base2k: base2k_out.into(),
k: k_out.into(),
rank: rank.into(),
};
let ksk_infos: GLWESwitchingKeyLayout = GLWESwitchingKeyLayout {
n: n.into(),
base2k: base2k.into(),
base2k: base2k_key.into(),
k: k_ksk.into(),
dnum: dnum.into(),
dsize: di.into(),
dsize: dsize.into(),
rank_in: rank.into(),
rank_out: rank.into(),
};
@@ -186,7 +196,12 @@ where
let mut source_xe: Source = Source::new([0u8; 32]);
let mut source_xa: Source = Source::new([0u8; 32]);
module.vec_znx_fill_uniform(base2k, &mut pt_want.data, 0, &mut source_xa);
module.vec_znx_fill_uniform(
pt_want.base2k().into(),
&mut pt_want.data,
0,
&mut source_xa,
);
let mut scratch: ScratchOwned<BE> = ScratchOwned::alloc(
GLWESwitchingKey::encrypt_sk_tmp_bytes(module, &ksk_infos)
@@ -230,18 +245,21 @@ where
glwe_out.keyswitch_inplace(module, &ksk_prepared, scratch.borrow());
let max_noise: f64 = log2_std_noise_gglwe_product(
let max_noise: f64 = var_noise_gglwe_product_v2(
module.n() as f64,
base2k * dsize,
k_ksk,
dnum,
dsize,
base2k_key,
0.5,
0.5,
0f64,
SIGMA * SIGMA,
0f64,
rank as f64,
k_out,
k_ksk,
);
)
.sqrt()
.log2();
glwe_out.assert_noise(module, &sk_out_prepared, &pt_want, max_noise + 0.5);
}