arnaucube/fhe-study
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fusion TFHE to use GFHE underthehood

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arnaucube
2025-07-24 14:32:44 +00:00
parent 87da85a035
commit 81306edf05
7 changed files with 54 additions and 173 deletions
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README.md
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@@ -19,8 +19,8 @@ and the line `type S = TWLE<K>` to use `CKKS<Q, N>` or `BFV<Q, N, T>`.
```rust
const T: u64 = 128; // msg space (msg modulus)
const K: usize = 16;
type S = TLWE<K>;
type M = Rq<T, 1>; // msg space
type S = TLWE<256>;
let mut rng = rand::thread_rng();
let msg_dist = Uniform::new(0_u64, T);
@@ -28,13 +28,13 @@ let msg_dist = Uniform::new(0_u64, T);
let (sk, pk) = S::new_key(&mut rng)?;
// get two random msgs in Z_t
let m1 = Rq::<T, 1>::rand_u64(&mut rng, msg_dist)?;
let m2 = Rq::<T, 1>::rand_u64(&mut rng, msg_dist)?;
let m3 = Rq::<T, 1>::rand_u64(&mut rng, msg_dist)?;
let m1 = M::rand_u64(&mut rng, msg_dist)?;
let m2 = M::rand_u64(&mut rng, msg_dist)?;
let m3 = M::rand_u64(&mut rng, msg_dist)?;
// encode the msgs into the plaintext space
let p1: Tn<1> = S::encode::<T>(&m1); // plaintext
let p2: Tn<1> = S::encode::<T>(&m2); // plaintext
let p1 = S::encode::<T>(&m1); // plaintext
let p2 = S::encode::<T>(&m2); // plaintext
let c3_const: Tn<1> = Tn(array::from_fn(|i| T64(m3.coeffs()[i].0))); // encode it as constant value
let c1 = S::encrypt(&mut rng, &pk, &p1)?;
@@ -42,8 +42,8 @@ let c2 = S::encrypt(&mut rng, &pk, &p2)?;
// now we can do encrypted operations (notice that we do them using simple
// operations by operator overloading):
let c3 = c1 + c2;
let c4 = c2 * c3_const;
let c_12 = c1 + c2;
let c4 = c_12 * c3_const;
// decrypt & decode
let p4_recovered = c4.decrypt(&sk);