sam.hadow/homomorphic-encryption
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correct noise values

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This commit is contained in:
Sam Hadow
2025-05-19 18:09:09 +02:00
parent 8fedb433ae
commit 0466492a53
3 changed files with 15 additions and 17 deletions
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16
src/dghv.rs
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@ -43,28 +43,28 @@ mod tests {
#[test]
fn test_encrypt_decrypt_bit() {
let eta = 64;
let eta = 10000;
let key = generate_secret_key(eta);
let bit = 0;
let ciphertext = encrypt_bit(bit, &key, 128, 61);
let ciphertext = encrypt_bit(bit, &key, 100, 100);
let decrypted = decrypt_bit(&ciphertext, &key);
assert_eq!(decrypted, bit);
let bit = 1;
let ciphertext = encrypt_bit(bit, &key, 128, 61);
let ciphertext = encrypt_bit(bit, &key, 100, 100);
let decrypted = decrypt_bit(&ciphertext, &key);
assert_eq!(decrypted, bit);
}
#[test]
fn test_multiple_encryptions_are_different() {
let eta = 64;
let eta = 10000;
let key = generate_secret_key(eta);
let bit = 1;
let c1 = encrypt_bit(bit, &key, 128, 61);
let c2 = encrypt_bit(bit, &key, 128, 61);
let c1 = encrypt_bit(bit, &key, 100, 100);
let c2 = encrypt_bit(bit, &key, 100, 100);
assert_ne!(c1, c2);
assert_eq!(decrypt_bit(&c1, &key), bit);
@ -77,8 +77,8 @@ mod tests {
let key = generate_secret_key(eta);
for &(b1, b2) in &[(0, 0), (0, 1), (1, 0), (1, 1)] {
let c1 = encrypt_bit(b1, &key, 4096, 512);
let c2 = encrypt_bit(b2, &key, 4096, 512);
let c1 = encrypt_bit(b1, &key, 45, 45);
let c2 = encrypt_bit(b2, &key, 45, 45);
let sum: Integer = c1.clone() + &c2;
let product: Integer = c1 * c2;

10
src/dghv_asym.rs
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@ -69,10 +69,9 @@ mod tests {
#[test]
fn test_key_generation_properties() {
let eta: u32 = 10000;
let gamma: u32 = 11000;
let theta: usize = 5;
let rho: u32 = 16;
let (sk, pk) = generate_keys(gamma, eta, rho, theta);
let rho: u32 = 100;
let (sk, pk) = generate_keys(rho, eta, rho, theta);
assert_eq!(sk.p.significant_bits(), eta);
assert!(sk.p.is_odd());
@ -90,12 +89,11 @@ mod tests {
use rayon::prelude::*;
let eta: u32 = 10000;
let gamma: u32 = 11000;
let theta: usize = 50;
let rho: u32 = 128;
let rho: u32 = 100;
(0..=127).into_par_iter().for_each(|_| {
let (sk, pk) = generate_keys(gamma, eta, rho, theta);
let (sk, pk) = generate_keys(rho, eta, rho, theta);
for &m in &[0u8, 1u8] {
let c = encrypt_bit_asym(m, &pk, rho);
let m2 = decrypt_bit(&c, &sk.p);

6
src/main.rs
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@ -5,13 +5,13 @@ mod utils;
use crate::dghv::{decrypt_bit, encrypt_bit, generate_secret_key};
fn main() {
let eta = 10000;
let eta = 6400;
let secret_key = generate_secret_key(eta);
let bit = 1;
let ciphertext = encrypt_bit(bit, &secret_key, 10000, 512);
let ciphertext = encrypt_bit(bit, &secret_key, 80, 80);
let decrypted = decrypt_bit(&ciphertext, &secret_key);
let opx2 = ciphertext.clone() * encrypt_bit(1, &secret_key, 10000, 512);
let opx2 = ciphertext.clone() * encrypt_bit(1, &secret_key, 80, 80);
let decrypted_opx2 = decrypt_bit(&opx2, &secret_key);
println!("clear bit (b): {}", bit);