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Add cross-basek normalization (#90)

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* added cross_basek_normalization

* updated method signatures to take layouts

* fixed cross-base normalization

fix #91
fix #93
This commit is contained in:
Jean-Philippe Bossuat
2025-09-30 14:40:10 +02:00
committed by GitHub
parent 4da790ea6a
commit 37e13b965c
216 changed files with 12481 additions and 7745 deletions
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18
poulpy-core/README.md
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@@ -26,13 +26,13 @@ fn main() {
let n: usize = 1<<log_n;
// Base-2-k (implicit digit decomposition)
let basek: usize = 14;
let base2k: usize = 14;
// Ciphertext Torus precision (equivalent to ciphertext modulus)
let k_ct: usize = 27;
// Plaintext Torus precision (equivament to plaintext modulus)
let k_pt: usize = basek;
let k_pt: usize = base2k;
// GLWE rank
let rank: usize = 1;
@@ -41,9 +41,9 @@ fn main() {
let module: Module<FFT64> = Module::<FFT64>::new(n as u64);
// Allocates ciphertext & plaintexts
let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_ct, rank);
let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k_pt);
let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k_pt);
let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, base2k, k_ct, rank);
let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, base2k, k_pt);
let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, base2k, k_pt);
// CPRNG
let mut source_xs: Source = Source::new([0u8; 32]);
@@ -52,8 +52,8 @@ fn main() {
// Scratch space
let mut scratch: ScratchOwned<FFT64> = ScratchOwned::alloc(
GLWECiphertext::encrypt_sk_scratch_space(&module, n, basek, ct.k())
| GLWECiphertext::decrypt_scratch_space(&module, n, basek, ct.k()),
GLWECiphertext::encrypt_sk_scratch_space(&module, n, base2k, ct.k())
| GLWECiphertext::decrypt_scratch_space(&module, n, base2k, ct.k()),
);
// Generate secret-key
@@ -64,7 +64,7 @@ fn main() {
let sk_prepared: GLWESecretPrepared<Vec<u8>, FFT64> = sk.prepare_alloc(&module, scratch.borrow());
// Uniform plaintext
module.vec_znx_fill_uniform(basek, &mut pt_want.data, 0, k_pt, &mut source_xa);
module.vec_znx_fill_uniform(base2k, &mut pt_want.data, 0, k_pt, &mut source_xa);
// Encryption
ct.encrypt_sk(
@@ -83,7 +83,7 @@ fn main() {
pt_want.sub_inplace_ab(&module, &pt_have);
// Ideal vs. actual noise
let noise_have: f64 = pt_want.data.std(basek, 0) * (ct.k() as f64).exp2();
let noise_have: f64 = pt_want.data.std(base2k, 0) * (ct.k() as f64).exp2();
let noise_want: f64 = SIGMA;
// Check