sam.hadow/homomorphic-encryption
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fix asymmetric encryption

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This commit is contained in:
Sam Hadow
2025-04-30 16:31:04 +02:00
parent 98a33dad0d
commit 976ffa0279
1 changed files with 9 additions and 7 deletions
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8
src/dghv_asym.rs
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@ -1,5 +1,5 @@
use crate::dghv::{encrypt_bit, generate_secret_key}; use crate::dghv::{encrypt_bit, generate_secret_key};
use crate::utils::generate_random_integer; use crate::utils::generate_random_odd_integer;
use rand::rngs::StdRng; use rand::rngs::StdRng;
use rand::Rng; use rand::Rng;
use rand::SeedableRng; use rand::SeedableRng;
@ -49,7 +49,7 @@ pub fn encrypt_bit_asym(m: u8, pk: &PublicKey, rho: u32) -> Integer {
} }
// noise // noise
let r = generate_random_integer(rho); let r = generate_random_odd_integer(rho);
let mut c = Integer::from(m); let mut c = Integer::from(m);
c += Integer::from(2) * r; c += Integer::from(2) * r;
c += sum; c += sum;
@ -86,14 +86,16 @@ mod tests {
fn test_encrypt_decrypt_bit() { fn test_encrypt_decrypt_bit() {
let eta: u32 = 1024; let eta: u32 = 1024;
let gamma: u32 = 2048; let gamma: u32 = 2048;
let theta: usize = 128; let theta: usize = 10;
let rho: u32 = 128; let rho: u32 = 128;
let (sk, pk) = generate_keys(gamma, eta, rho, theta); let (sk, pk) = generate_keys(gamma, eta, rho, theta);
for _ in 0..=10000 {
for &m in &[0u8, 1u8] { for &m in &[0u8, 1u8] {
let c = encrypt_bit_asym(m, &pk, rho); let c = encrypt_bit_asym(m, &pk, rho);
let m2 = decrypt_bit(&c, &sk.p); let m2 = decrypt_bit(&c, &sk.p);
assert_eq!(m, m2); assert_eq!(m, m2);
} }
} }
}
} }