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Added noise based test for glwe pk enc

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This commit is contained in:
Jean-Philippe Bossuat
2025-05-14 14:57:04 +02:00
parent d489bef105
commit cb1928802a
1 changed files with 30 additions and 26 deletions
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56
core/src/test_fft64/glwe.rs
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@@ -17,21 +17,30 @@ use crate::{
};
#[test]
fn encrypt_sk_rank_1() {
encrypt_sk(11, 8, 54, 30, 3.2, 1);
fn encrypt_sk() {
(1..4).for_each(|rank| {
println!("test encrypt_sk rank: {}", rank);
test_encrypt_sk(11, 8, 54, 30, 3.2, rank);
});
}
#[test]
fn encrypt_sk_rank_2() {
encrypt_sk(5, 8, 54, 30, 3.2, 2);
fn encrypt_zero_sk() {
(1..4).for_each(|rank| {
println!("test encrypt_zero_sk rank: {}", rank);
test_encrypt_zero_sk(11, 8, 64, 3.2, rank);
});
}
#[test]
fn encrypt_sk_rank_3() {
encrypt_sk(11, 8, 54, 30, 3.2, 3);
fn encrypt_pk() {
(1..4).for_each(|rank| {
println!("test encrypt_pk rank: {}", rank);
test_encrypt_pk(11, 8, 64, 64, 3.2, rank)
});
}
fn encrypt_sk(log_n: usize, basek: usize, k_ct: usize, k_pt: usize, sigma: f64, rank: usize) {
fn test_encrypt_sk(log_n: usize, basek: usize, k_ct: usize, k_pt: usize, sigma: f64, rank: usize) {
let module: Module<FFT64> = Module::<FFT64>::new(1 << log_n);
let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::new(&module, basek, k_ct, rank);
@@ -92,14 +101,8 @@ fn encrypt_sk(log_n: usize, basek: usize, k_ct: usize, k_pt: usize, sigma: f64,
});
}
#[test]
fn encrypt_zero_sk() {
let module: Module<FFT64> = Module::<FFT64>::new(1024);
let basek: usize = 8;
let k_ct: usize = 55;
let rank: usize = 1;
let sigma: f64 = 3.2;
fn test_encrypt_zero_sk(log_n: usize, basek: usize, k_ct: usize, sigma: f64, rank: usize) {
let module: Module<FFT64> = Module::<FFT64>::new(1 << log_n);
let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::new(&module, basek, k_ct);
@@ -132,15 +135,8 @@ fn encrypt_zero_sk() {
assert!((sigma - pt.data.std(0, basek) * (k_ct as f64).exp2()) <= 0.2);
}
#[test]
fn encrypt_pk() {
let module: Module<FFT64> = Module::<FFT64>::new(32);
let basek: usize = 8;
let k_ct: usize = 54;
let log_k_pk: usize = 64;
let rank: usize = 1;
let sigma: f64 = 3.2;
fn test_encrypt_pk(log_n: usize, basek: usize, k_ct: usize, k_pk: usize, sigma: f64, rank: usize) {
let module: Module<FFT64> = Module::<FFT64>::new(1 << log_n);
let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::new(&module, basek, k_ct, rank);
let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::new(&module, basek, k_ct);
@@ -155,7 +151,7 @@ fn encrypt_pk() {
let mut sk_dft: SecretKeyFourier<Vec<u8>, FFT64> = SecretKeyFourier::new(&module, rank);
sk_dft.dft(&module, &sk);
let mut pk: GLWEPublicKey<Vec<u8>, FFT64> = GLWEPublicKey::new(&module, basek, log_k_pk, rank);
let mut pk: GLWEPublicKey<Vec<u8>, FFT64> = GLWEPublicKey::new(&module, basek, k_pk, rank);
pk.generate(&module, &sk_dft, &mut source_xa, &mut source_xe, sigma);
let mut scratch: ScratchOwned = ScratchOwned::new(
@@ -188,7 +184,15 @@ fn encrypt_pk() {
module.vec_znx_sub_ab_inplace(&mut pt_want, 0, &pt_have, 0);
assert!(((1.0f64 / 12.0).sqrt() - pt_want.data.std(0, basek) * (k_ct as f64).exp2()).abs() < 0.2);
let noise_have: f64 = pt_want.data.std(0, basek).log2();
let noise_want: f64 = ((((rank as f64) + 1.0) * module.n() as f64 * 0.5 * sigma * sigma).sqrt()).log2() - (k_ct as f64);
assert!(
(noise_have - noise_want).abs() < 0.2,
"{} {}",
noise_have,
noise_want
);
}
#[test]