Trait GLWEOperations 

pub trait GLWEOperations:
    GLWECiphertextToMut
    + SetMetaData
    + Sized {
    // Provided methods
    fn add<A, B, BACKEND: Backend>(
        &mut self,
        module: &Module<BACKEND>,
        a: &A,
        b: &B,
    )
       where A: GLWECiphertextToRef,
             B: GLWECiphertextToRef,
             Module<BACKEND>: VecZnxAdd + VecZnxCopy { ... }
    fn add_inplace<A, BACKEND: Backend>(
        &mut self,
        module: &Module<BACKEND>,
        a: &A,
    )
       where A: GLWECiphertextToRef + Infos,
             Module<BACKEND>: VecZnxAddInplace { ... }
    fn sub<A, B, BACKEND: Backend>(
        &mut self,
        module: &Module<BACKEND>,
        a: &A,
        b: &B,
    )
       where A: GLWECiphertextToRef,
             B: GLWECiphertextToRef,
             Module<BACKEND>: VecZnxSub + VecZnxCopy + VecZnxNegateInplace { ... }
    fn sub_inplace_ab<A, BACKEND: Backend>(
        &mut self,
        module: &Module<BACKEND>,
        a: &A,
    )
       where A: GLWECiphertextToRef + Infos,
             Module<BACKEND>: VecZnxSubABInplace { ... }
    fn sub_inplace_ba<A, BACKEND: Backend>(
        &mut self,
        module: &Module<BACKEND>,
        a: &A,
    )
       where A: GLWECiphertextToRef + Infos,
             Module<BACKEND>: VecZnxSubBAInplace { ... }
    fn rotate<A, B: Backend>(&mut self, module: &Module<B>, k: i64, a: &A)
       where A: GLWECiphertextToRef + Infos,
             Module<B>: VecZnxRotate { ... }
    fn rotate_inplace<B: Backend>(
        &mut self,
        module: &Module<B>,
        k: i64,
        scratch: &mut Scratch<B>,
    )
       where Module<B>: VecZnxRotateInplace<B> { ... }
    fn mul_xp_minus_one<A, B: Backend>(
        &mut self,
        module: &Module<B>,
        k: i64,
        a: &A,
    )
       where A: GLWECiphertextToRef + Infos,
             Module<B>: VecZnxMulXpMinusOne { ... }
    fn mul_xp_minus_one_inplace<B: Backend>(
        &mut self,
        module: &Module<B>,
        k: i64,
        scratch: &mut Scratch<B>,
    )
       where Module<B>: VecZnxMulXpMinusOneInplace<B> { ... }
    fn copy<A, B: Backend>(&mut self, module: &Module<B>, a: &A)
       where A: GLWECiphertextToRef + Infos,
             Module<B>: VecZnxCopy { ... }
    fn rsh<B: Backend>(
        &mut self,
        module: &Module<B>,
        k: usize,
        scratch: &mut Scratch<B>,
    )
       where Module<B>: VecZnxRshInplace<B> { ... }
    fn normalize<A, B: Backend>(
        &mut self,
        module: &Module<B>,
        a: &A,
        scratch: &mut Scratch<B>,
    )
       where A: GLWECiphertextToRef,
             Module<B>: VecZnxNormalize<B> { ... }
    fn normalize_inplace<B: Backend>(
        &mut self,
        module: &Module<B>,
        scratch: &mut Scratch<B>,
    )
       where Module<B>: VecZnxNormalizeInplace<B> { ... }
}

Provided Methods

fn add<A, B, BACKEND: Backend>( &mut self, module: &Module<BACKEND>, a: &A, b: &B, )

where A: GLWECiphertextToRef, B: GLWECiphertextToRef, Module<BACKEND>: VecZnxAdd + VecZnxCopy,

fn add_inplace<A, BACKEND: Backend>(&mut self, module: &Module<BACKEND>, a: &A)

where A: GLWECiphertextToRef + Infos, Module<BACKEND>: VecZnxAddInplace,

fn sub<A, B, BACKEND: Backend>( &mut self, module: &Module<BACKEND>, a: &A, b: &B, )

where A: GLWECiphertextToRef, B: GLWECiphertextToRef, Module<BACKEND>: VecZnxSub + VecZnxCopy + VecZnxNegateInplace,

fn sub_inplace_ab<A, BACKEND: Backend>( &mut self, module: &Module<BACKEND>, a: &A, )

where A: GLWECiphertextToRef + Infos, Module<BACKEND>: VecZnxSubABInplace,

Examples found in repository

examples/encryption.rs (line 76)

fn main() {
    // Ring degree
    let log_n: usize = 10;

    let n: usize = 1 << log_n;

    // Base-2-k (implicit digit decomposition)
    let basek: 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;

    // GLWE rank
    let rank: usize = 1;

    // Instantiate Module (DFT Tables)
    let module: Module<FFT64Spqlios> = Module::<FFT64Spqlios>::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);

    // CPRNG
    let mut source_xs: Source = Source::new([0u8; 32]);
    let mut source_xe: Source = Source::new([1u8; 32]);
    let mut source_xa: Source = Source::new([2u8; 32]);

    // Scratch space
    let mut scratch: ScratchOwned<FFT64Spqlios> = ScratchOwned::alloc(
        GLWECiphertext::encrypt_sk_scratch_space(&module, basek, ct.k())
            | GLWECiphertext::decrypt_scratch_space(&module, basek, ct.k()),
    );

    // Generate secret-key
    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
    sk.fill_ternary_prob(0.5, &mut source_xs);

    // Backend-prepared secret
    let sk_prepared: GLWESecretPrepared<Vec<u8>, FFT64Spqlios> = sk.prepare_alloc(&module, scratch.borrow());

    // Uniform plaintext
    module.vec_znx_fill_uniform(basek, &mut pt_want.data, 0, &mut source_xa);

    // Encryption
    ct.encrypt_sk(
        &module,
        &pt_want,
        &sk_prepared,
        &mut source_xa,
        &mut source_xe,
        scratch.borrow(),
    );

    // Decryption
    ct.decrypt(&module, &mut pt_have, &sk_prepared, scratch.borrow());

    // Diff between pt - Dec(Enc(pt))
    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_want: f64 = SIGMA;

    // Check
    assert!(noise_have <= noise_want + 0.2);
}

fn sub_inplace_ba<A, BACKEND: Backend>( &mut self, module: &Module<BACKEND>, a: &A, )

where A: GLWECiphertextToRef + Infos, Module<BACKEND>: VecZnxSubBAInplace,

fn rotate<A, B: Backend>(&mut self, module: &Module<B>, k: i64, a: &A)

where A: GLWECiphertextToRef + Infos, Module<B>: VecZnxRotate,

fn rotate_inplace<B: Backend>( &mut self, module: &Module<B>, k: i64, scratch: &mut Scratch<B>, )

where Module<B>: VecZnxRotateInplace<B>,

fn mul_xp_minus_one<A, B: Backend>(&mut self, module: &Module<B>, k: i64, a: &A)

where A: GLWECiphertextToRef + Infos, Module<B>: VecZnxMulXpMinusOne,

fn mul_xp_minus_one_inplace<B: Backend>( &mut self, module: &Module<B>, k: i64, scratch: &mut Scratch<B>, )

where Module<B>: VecZnxMulXpMinusOneInplace<B>,

fn copy<A, B: Backend>(&mut self, module: &Module<B>, a: &A)

where A: GLWECiphertextToRef + Infos, Module<B>: VecZnxCopy,

fn rsh<B: Backend>( &mut self, module: &Module<B>, k: usize, scratch: &mut Scratch<B>, )

where Module<B>: VecZnxRshInplace<B>,

fn normalize<A, B: Backend>( &mut self, module: &Module<B>, a: &A, scratch: &mut Scratch<B>, )

where A: GLWECiphertextToRef, Module<B>: VecZnxNormalize<B>,

fn normalize_inplace<B: Backend>( &mut self, module: &Module<B>, scratch: &mut Scratch<B>, )

where Module<B>: VecZnxNormalizeInplace<B>,

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<D> GLWEOperations for GLWEPlaintext<D>

where D: DataMut, GLWEPlaintext<D>: GLWECiphertextToMut + Infos + SetMetaData,

impl<D: DataMut> GLWEOperations for GLWECiphertext<D>

where GLWECiphertext<D>: GLWECiphertextToMut + Infos + SetMetaData,