github/tfhe-rs
1
1
Fork 0
mirror of https://github.com/zama-ai/tfhe-rs.git synced 2026-01-09 22:57:59 -05:00
Code Issues Packages Projects Releases Wiki Activity

fix: fix the atomic pattern used to cast in trivium and a test in shortint

Browse Source 
- parameters are optimized for a clean ciphertext, the ciphertext being
keyswitched was noisy
This commit is contained in:
Arthur Meyre
2025-02-27 11:16:55 +01:00
parent f457ac40e5
commit 877d0234ac
2 changed files with 13 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
apps/trivium/src/trans_ciphering/mod.rs
View File

@@ -48,6 +48,8 @@ fn transcipher_from_1_1_stream(
) -> FheUint64 {
assert_eq!(stream.len(), 64);
let id_lut = internal_server_key.generate_lookup_table(|x| x);
let pairs = (0..32)
.into_par_iter()
.map(|i| {
@@ -57,10 +59,11 @@ fn transcipher_from_1_1_stream(
let b0 = &stream[8 * byte_idx + 2 * pair_idx];
let b1 = &stream[8 * byte_idx + 2 * pair_idx + 1];
casting_key.cast(
&internal_server_key
.unchecked_add(b0, &internal_server_key.unchecked_scalar_mul(b1, 2)),
)
let mut combined = internal_server_key
.unchecked_add(b0, &internal_server_key.unchecked_scalar_mul(b1, 2));
internal_server_key.apply_lookup_table_assign(&mut combined, &id_lut);
casting_key.cast(&combined)
})
.collect::<Vec<_>>();