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rework for GLWE

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This commit is contained in:
Jean-Philippe Bossuat
2025-05-13 00:40:07 +02:00
parent d8a7d6cdaf
commit 31b14ee585
19 changed files with 2290 additions and 1531 deletions
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137
core/src/test_fft64/grlwe.rs
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@@ -2,11 +2,15 @@ use base2k::{FFT64, Module, ScalarZnx, ScalarZnxAlloc, ScratchOwned, Stats, VecZ
use sampling::source::Source;
use crate::{
elem::{GetRow, Infos, ProdInplace, ProdInplaceScratchSpace, ProdScratchSpace, Product},
grlwe::GRLWECt,
keys::{SecretKey, SecretKeyDft},
rgsw::RGSWCt,
rlwe::{RLWECtDft, RLWEPt},
elem::{GetRow, Infos},
external_product::{
ExternalProduct, ExternalProductInplace, ExternalProductInplaceScratchSpace, ExternalProductScratchSpace,
},
ggsw::GGSWCiphertext,
glwe::{GLWECiphertextFourier, GLWEPlaintext},
keys::{SecretKey, SecretKeyFourier},
keyswitch::{KeySwitch, KeySwitchInplace, KeySwitchInplaceScratchSpace, KeySwitchScratchSpace},
keyswitch_key::GLWEKeySwitchKey,
test_fft64::rgsw::noise_rgsw_product,
};
@@ -20,8 +24,8 @@ fn encrypt_sk() {
let sigma: f64 = 3.2;
let bound: f64 = sigma * 6.0;
let mut ct: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_ct, rows);
let mut pt: RLWEPt<Vec<u8>> = RLWEPt::new(&module, log_base2k, log_k_ct);
let mut ct: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_ct, rows);
let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::new(&module, log_base2k, log_k_ct);
let mut pt_scalar: ScalarZnx<Vec<u8>> = module.new_scalar_znx(1);
let mut source_xs: Source = Source::new([0u8; 32]);
@@ -31,13 +35,14 @@ fn encrypt_sk() {
pt_scalar.fill_ternary_hw(0, module.n(), &mut source_xs);
let mut scratch: ScratchOwned = ScratchOwned::new(
GRLWECt::encrypt_sk_scratch_space(&module, ct.size()) | RLWECtDft::decrypt_scratch_space(&module, ct.size()),
GLWEKeySwitchKey::encrypt_sk_scratch_space(&module, ct.size())
| GLWECiphertextFourier::decrypt_scratch_space(&module, ct.size()),
);
let mut sk: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk.fill_ternary_prob(0.5, &mut source_xs);
let mut sk_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk_dft.dft(&module, &sk);
ct.encrypt_sk(
@@ -51,7 +56,7 @@ fn encrypt_sk() {
scratch.borrow(),
);
let mut ct_rlwe_dft: RLWECtDft<Vec<u8>, FFT64> = RLWECtDft::new(&module, log_base2k, log_k_ct);
let mut ct_rlwe_dft: GLWECiphertextFourier<Vec<u8>, FFT64> = GLWECiphertextFourier::new(&module, log_base2k, log_k_ct);
(0..ct.rows()).for_each(|row_i| {
ct.get_row(&module, row_i, 0, &mut ct_rlwe_dft);
@@ -60,12 +65,10 @@ fn encrypt_sk() {
let std_pt: f64 = pt.data.std(0, log_base2k) * (log_k_ct as f64).exp2();
assert!((sigma - std_pt).abs() <= 0.2, "{} {}", sigma, std_pt);
});
module.free();
}
#[test]
fn from_prod_by_grlwe() {
fn keyswitch() {
let module: Module<FFT64> = Module::<FFT64>::new(2048);
let log_base2k: usize = 12;
let log_k_grlwe: usize = 60;
@@ -74,18 +77,18 @@ fn from_prod_by_grlwe() {
let sigma: f64 = 3.2;
let bound: f64 = sigma * 6.0;
let mut ct_grlwe_s0s1: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_s1s2: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_s0s2: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_s0s1: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_s1s2: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_s0s2: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_grlwe, rows);
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 = ScratchOwned::new(
GRLWECt::encrypt_sk_scratch_space(&module, ct_grlwe_s0s1.size())
| RLWECtDft::decrypt_scratch_space(&module, ct_grlwe_s0s2.size())
| GRLWECt::prod_by_grlwe_scratch_space(
GLWEKeySwitchKey::encrypt_sk_scratch_space(&module, ct_grlwe_s0s1.size())
| GLWECiphertextFourier::decrypt_scratch_space(&module, ct_grlwe_s0s2.size())
| GLWEKeySwitchKey::keyswitch_scratch_space(
&module,
ct_grlwe_s0s2.size(),
ct_grlwe_s0s1.size(),
@@ -96,19 +99,19 @@ fn from_prod_by_grlwe() {
let mut sk0: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk0.fill_ternary_prob(0.5, &mut source_xs);
let mut sk0_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk0_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk0_dft.dft(&module, &sk0);
let mut sk1: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk1.fill_ternary_prob(0.5, &mut source_xs);
let mut sk1_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk1_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk1_dft.dft(&module, &sk1);
let mut sk2: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk2.fill_ternary_prob(0.5, &mut source_xs);
let mut sk2_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk2_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk2_dft.dft(&module, &sk2);
// GRLWE_{s1}(s0) = s0 -> s1
@@ -136,10 +139,11 @@ fn from_prod_by_grlwe() {
);
// GRLWE_{s1}(s0) (x) GRLWE_{s2}(s1) = GRLWE_{s2}(s0)
ct_grlwe_s0s2.prod_by_grlwe(&module, &ct_grlwe_s0s1, &ct_grlwe_s1s2, scratch.borrow());
ct_grlwe_s0s2.keyswitch(&module, &ct_grlwe_s0s1, &ct_grlwe_s1s2, scratch.borrow());
let mut ct_rlwe_dft_s0s2: RLWECtDft<Vec<u8>, FFT64> = RLWECtDft::new(&module, log_base2k, log_k_grlwe);
let mut pt: RLWEPt<Vec<u8>> = RLWEPt::new(&module, log_base2k, log_k_grlwe);
let mut ct_rlwe_dft_s0s2: GLWECiphertextFourier<Vec<u8>, FFT64> =
GLWECiphertextFourier::new(&module, log_base2k, log_k_grlwe);
let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::new(&module, log_base2k, log_k_grlwe);
(0..ct_grlwe_s0s2.rows()).for_each(|row_i| {
ct_grlwe_s0s2.get_row(&module, row_i, 0, &mut ct_rlwe_dft_s0s2);
@@ -166,12 +170,10 @@ fn from_prod_by_grlwe() {
noise_want
);
});
module.free();
}
#[test]
fn prod_by_grlwe() {
fn keyswitch_inplace() {
let module: Module<FFT64> = Module::<FFT64>::new(2048);
let log_base2k: usize = 12;
let log_k_grlwe: usize = 60;
@@ -180,35 +182,35 @@ fn prod_by_grlwe() {
let sigma: f64 = 3.2;
let bound: f64 = sigma * 6.0;
let mut ct_grlwe_s0s1: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_s1s2: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_s0s1: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_s1s2: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_grlwe, rows);
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 = ScratchOwned::new(
GRLWECt::encrypt_sk_scratch_space(&module, ct_grlwe_s0s1.size())
| RLWECtDft::decrypt_scratch_space(&module, ct_grlwe_s0s1.size())
| GRLWECt::prod_by_grlwe_inplace_scratch_space(&module, ct_grlwe_s0s1.size(), ct_grlwe_s1s2.size()),
GLWEKeySwitchKey::encrypt_sk_scratch_space(&module, ct_grlwe_s0s1.size())
| GLWECiphertextFourier::decrypt_scratch_space(&module, ct_grlwe_s0s1.size())
| GLWEKeySwitchKey::keyswitch_inplace_scratch_space(&module, ct_grlwe_s0s1.size(), ct_grlwe_s1s2.size()),
);
let mut sk0: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk0.fill_ternary_prob(0.5, &mut source_xs);
let mut sk0_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk0_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk0_dft.dft(&module, &sk0);
let mut sk1: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk1.fill_ternary_prob(0.5, &mut source_xs);
let mut sk1_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk1_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk1_dft.dft(&module, &sk1);
let mut sk2: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk2.fill_ternary_prob(0.5, &mut source_xs);
let mut sk2_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk2_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk2_dft.dft(&module, &sk2);
// GRLWE_{s1}(s0) = s0 -> s1
@@ -236,12 +238,13 @@ fn prod_by_grlwe() {
);
// GRLWE_{s1}(s0) (x) GRLWE_{s2}(s1) = GRLWE_{s2}(s0)
ct_grlwe_s0s1.prod_by_grlwe_inplace(&module, &ct_grlwe_s1s2, scratch.borrow());
ct_grlwe_s0s1.keyswitch_inplace(&module, &ct_grlwe_s1s2, scratch.borrow());
let ct_grlwe_s0s2: GRLWECt<Vec<u8>, FFT64> = ct_grlwe_s0s1;
let ct_grlwe_s0s2: GLWEKeySwitchKey<Vec<u8>, FFT64> = ct_grlwe_s0s1;
let mut ct_rlwe_dft_s0s2: RLWECtDft<Vec<u8>, FFT64> = RLWECtDft::new(&module, log_base2k, log_k_grlwe);
let mut pt: RLWEPt<Vec<u8>> = RLWEPt::new(&module, log_base2k, log_k_grlwe);
let mut ct_rlwe_dft_s0s2: GLWECiphertextFourier<Vec<u8>, FFT64> =
GLWECiphertextFourier::new(&module, log_base2k, log_k_grlwe);
let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::new(&module, log_base2k, log_k_grlwe);
(0..ct_grlwe_s0s2.rows()).for_each(|row_i| {
ct_grlwe_s0s2.get_row(&module, row_i, 0, &mut ct_rlwe_dft_s0s2);
@@ -268,12 +271,10 @@ fn prod_by_grlwe() {
noise_want
);
});
module.free();
}
#[test]
fn from_prod_by_rgsw() {
fn external_product() {
let module: Module<FFT64> = Module::<FFT64>::new(2048);
let log_base2k: usize = 12;
let log_k_grlwe: usize = 60;
@@ -282,9 +283,9 @@ fn from_prod_by_rgsw() {
let sigma: f64 = 3.2;
let bound: f64 = sigma * 6.0;
let mut ct_grlwe_in: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_out: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_rgsw: RGSWCt<Vec<u8>, FFT64> = RGSWCt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_in: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe_out: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_rgsw: GGSWCiphertext<Vec<u8>, FFT64> = GGSWCiphertext::new(&module, log_base2k, log_k_grlwe, rows);
let mut pt_rgsw: ScalarZnx<Vec<u8>> = module.new_scalar_znx(1);
let mut pt_grlwe: ScalarZnx<Vec<u8>> = module.new_scalar_znx(1);
@@ -294,15 +295,15 @@ fn from_prod_by_rgsw() {
let mut source_xa: Source = Source::new([0u8; 32]);
let mut scratch: ScratchOwned = ScratchOwned::new(
GRLWECt::encrypt_sk_scratch_space(&module, ct_grlwe_in.size())
| RLWECtDft::decrypt_scratch_space(&module, ct_grlwe_out.size())
| GRLWECt::prod_by_rgsw_scratch_space(
GLWEKeySwitchKey::encrypt_sk_scratch_space(&module, ct_grlwe_in.size())
| GLWECiphertextFourier::decrypt_scratch_space(&module, ct_grlwe_out.size())
| GLWEKeySwitchKey::external_product_scratch_space(
&module,
ct_grlwe_out.size(),
ct_grlwe_in.size(),
ct_rgsw.size(),
)
| RGSWCt::encrypt_sk_scratch_space(&module, ct_rgsw.size()),
| GGSWCiphertext::encrypt_sk_scratch_space(&module, ct_rgsw.size()),
);
let k: usize = 1;
@@ -314,7 +315,7 @@ fn from_prod_by_rgsw() {
let mut sk: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk.fill_ternary_prob(0.5, &mut source_xs);
let mut sk_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk_dft.dft(&module, &sk);
// GRLWE_{s1}(s0) = s0 -> s1
@@ -341,10 +342,11 @@ fn from_prod_by_rgsw() {
);
// GRLWE_(m) (x) RGSW_(X^k) = GRLWE_(m * X^k)
ct_grlwe_out.prod_by_rgsw(&module, &ct_grlwe_in, &ct_rgsw, scratch.borrow());
ct_grlwe_out.external_product(&module, &ct_grlwe_in, &ct_rgsw, scratch.borrow());
let mut ct_rlwe_dft_s0s2: RLWECtDft<Vec<u8>, FFT64> = RLWECtDft::new(&module, log_base2k, log_k_grlwe);
let mut pt: RLWEPt<Vec<u8>> = RLWEPt::new(&module, log_base2k, log_k_grlwe);
let mut ct_rlwe_dft_s0s2: GLWECiphertextFourier<Vec<u8>, FFT64> =
GLWECiphertextFourier::new(&module, log_base2k, log_k_grlwe);
let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::new(&module, log_base2k, log_k_grlwe);
module.vec_znx_rotate_inplace(k as i64, &mut pt_grlwe, 0);
@@ -382,12 +384,10 @@ fn from_prod_by_rgsw() {
noise_want
);
});
module.free();
}
#[test]
fn prod_by_rgsw() {
fn external_product_inplace() {
let module: Module<FFT64> = Module::<FFT64>::new(2048);
let log_base2k: usize = 12;
let log_k_grlwe: usize = 60;
@@ -396,8 +396,8 @@ fn prod_by_rgsw() {
let sigma: f64 = 3.2;
let bound: f64 = sigma * 6.0;
let mut ct_grlwe: GRLWECt<Vec<u8>, FFT64> = GRLWECt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_rgsw: RGSWCt<Vec<u8>, FFT64> = RGSWCt::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_grlwe: GLWEKeySwitchKey<Vec<u8>, FFT64> = GLWEKeySwitchKey::new(&module, log_base2k, log_k_grlwe, rows);
let mut ct_rgsw: GGSWCiphertext<Vec<u8>, FFT64> = GGSWCiphertext::new(&module, log_base2k, log_k_grlwe, rows);
let mut pt_rgsw: ScalarZnx<Vec<u8>> = module.new_scalar_znx(1);
let mut pt_grlwe: ScalarZnx<Vec<u8>> = module.new_scalar_znx(1);
@@ -407,10 +407,10 @@ fn prod_by_rgsw() {
let mut source_xa: Source = Source::new([0u8; 32]);
let mut scratch: ScratchOwned = ScratchOwned::new(
GRLWECt::encrypt_sk_scratch_space(&module, ct_grlwe.size())
| RLWECtDft::decrypt_scratch_space(&module, ct_grlwe.size())
| GRLWECt::prod_by_rgsw_inplace_scratch_space(&module, ct_grlwe.size(), ct_rgsw.size())
| RGSWCt::encrypt_sk_scratch_space(&module, ct_rgsw.size()),
GLWEKeySwitchKey::encrypt_sk_scratch_space(&module, ct_grlwe.size())
| GLWECiphertextFourier::decrypt_scratch_space(&module, ct_grlwe.size())
| GLWEKeySwitchKey::external_product_inplace_scratch_space(&module, ct_grlwe.size(), ct_rgsw.size())
| GGSWCiphertext::encrypt_sk_scratch_space(&module, ct_rgsw.size()),
);
let k: usize = 1;
@@ -422,7 +422,7 @@ fn prod_by_rgsw() {
let mut sk: SecretKey<Vec<u8>> = SecretKey::new(&module);
sk.fill_ternary_prob(0.5, &mut source_xs);
let mut sk_dft: SecretKeyDft<Vec<u8>, FFT64> = SecretKeyDft::new(&module);
let mut sk_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module);
sk_dft.dft(&module, &sk);
// GRLWE_{s1}(s0) = s0 -> s1
@@ -449,10 +449,11 @@ fn prod_by_rgsw() {
);
// GRLWE_(m) (x) RGSW_(X^k) = GRLWE_(m * X^k)
ct_grlwe.prod_by_rgsw_inplace(&module, &ct_rgsw, scratch.borrow());
ct_grlwe.external_product_inplace(&module, &ct_rgsw, scratch.borrow());
let mut ct_rlwe_dft_s0s2: RLWECtDft<Vec<u8>, FFT64> = RLWECtDft::new(&module, log_base2k, log_k_grlwe);
let mut pt: RLWEPt<Vec<u8>> = RLWEPt::new(&module, log_base2k, log_k_grlwe);
let mut ct_rlwe_dft_s0s2: GLWECiphertextFourier<Vec<u8>, FFT64> =
GLWECiphertextFourier::new(&module, log_base2k, log_k_grlwe);
let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::new(&module, log_base2k, log_k_grlwe);
module.vec_znx_rotate_inplace(k as i64, &mut pt_grlwe, 0);
@@ -490,8 +491,6 @@ fn prod_by_rgsw() {
noise_want
);
});
module.free();
}
pub(crate) fn noise_grlwe_rlwe_product(