Struct GLWESecret 

pub struct GLWESecret<D: Data> { /* private fields */ }

Implementations

impl GLWESecret<Vec<u8>>

pub fn alloc_from_infos<A>(infos: &A) -> Self

where A: GLWEInfos,

Examples found in repository

examples/encryption.rs (line 67)

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

    let n: Degree = Degree(1 << log_n);

    // Base-2-k (implicit digit decomposition)
    let base2k: Base2K = Base2K(14);

    // Ciphertext Torus precision (equivalent to ciphertext modulus)
    let k_ct: TorusPrecision = TorusPrecision(27);

    // Plaintext Torus precision (equivament to plaintext modulus)
    let k_pt: TorusPrecision = TorusPrecision(base2k.into());

    // GLWE rank
    let rank: Rank = Rank(1);

    // Instantiate Module (DFT Tables)
    let module: Module<BackendImpl> = Module::<BackendImpl>::new(n.0 as u64);

    let glwe_ct_infos: GLWELayout = GLWELayout {
        n,
        base2k,
        k: k_ct,
        rank,
    };

    let glwe_pt_infos: GLWEPlaintextLayout = GLWEPlaintextLayout { n, base2k, k: k_pt };

    // Allocates ciphertext & plaintexts
    let mut ct: GLWE<Vec<u8>> = GLWE::alloc_from_infos(&glwe_ct_infos);
    let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_pt_infos);
    let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_pt_infos);

    // 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<BackendImpl> = ScratchOwned::alloc(
        GLWE::encrypt_sk_tmp_bytes(&module, &glwe_ct_infos) | GLWE::decrypt_tmp_bytes(&module, &glwe_ct_infos),
    );

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

    // Backend-prepared secret
    let mut sk_prepared: GLWESecretPrepared<Vec<u8>, BackendImpl> = GLWESecretPrepared::alloc(&module, rank);
    sk_prepared.prepare(&module, &sk);

    // Uniform plaintext
    module.vec_znx_fill_uniform(base2k.into(), &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))
    module.glwe_sub_inplace(&mut pt_want, &pt_have);

    // Ideal vs. actual noise
    let noise_have: f64 = pt_want.data.stats(base2k.into(), 0).std() * (ct.k().as_u32() as f64).exp2();
    let noise_want: f64 = SIGMA;

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

pub fn alloc(n: Degree, rank: Rank) -> Self

pub fn bytes_of_from_infos<A>(infos: &A) -> usize

where A: GLWEInfos,

pub fn bytes_of(n: Degree, rank: Rank) -> usize

impl<D: DataMut> GLWESecret<D>

pub fn fill_ternary_prob(&mut self, prob: f64, source: &mut Source)

Examples found in repository

examples/encryption.rs (line 68)

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

    let n: Degree = Degree(1 << log_n);

    // Base-2-k (implicit digit decomposition)
    let base2k: Base2K = Base2K(14);

    // Ciphertext Torus precision (equivalent to ciphertext modulus)
    let k_ct: TorusPrecision = TorusPrecision(27);

    // Plaintext Torus precision (equivament to plaintext modulus)
    let k_pt: TorusPrecision = TorusPrecision(base2k.into());

    // GLWE rank
    let rank: Rank = Rank(1);

    // Instantiate Module (DFT Tables)
    let module: Module<BackendImpl> = Module::<BackendImpl>::new(n.0 as u64);

    let glwe_ct_infos: GLWELayout = GLWELayout {
        n,
        base2k,
        k: k_ct,
        rank,
    };

    let glwe_pt_infos: GLWEPlaintextLayout = GLWEPlaintextLayout { n, base2k, k: k_pt };

    // Allocates ciphertext & plaintexts
    let mut ct: GLWE<Vec<u8>> = GLWE::alloc_from_infos(&glwe_ct_infos);
    let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_pt_infos);
    let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_pt_infos);

    // 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<BackendImpl> = ScratchOwned::alloc(
        GLWE::encrypt_sk_tmp_bytes(&module, &glwe_ct_infos) | GLWE::decrypt_tmp_bytes(&module, &glwe_ct_infos),
    );

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

    // Backend-prepared secret
    let mut sk_prepared: GLWESecretPrepared<Vec<u8>, BackendImpl> = GLWESecretPrepared::alloc(&module, rank);
    sk_prepared.prepare(&module, &sk);

    // Uniform plaintext
    module.vec_znx_fill_uniform(base2k.into(), &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))
    module.glwe_sub_inplace(&mut pt_want, &pt_have);

    // Ideal vs. actual noise
    let noise_have: f64 = pt_want.data.stats(base2k.into(), 0).std() * (ct.k().as_u32() as f64).exp2();
    let noise_want: f64 = SIGMA;

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

pub fn fill_ternary_hw(&mut self, hw: usize, source: &mut Source)

pub fn fill_binary_prob(&mut self, prob: f64, source: &mut Source)

pub fn fill_binary_hw(&mut self, hw: usize, source: &mut Source)

pub fn fill_binary_block(&mut self, block_size: usize, source: &mut Source)

pub fn fill_zero(&mut self)

Trait Implementations

impl<D: Clone + Data> Clone for GLWESecret<D>

fn clone(&self) -> GLWESecret<D>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<D: Data> GLWEInfos for GLWESecret<D>

fn rank(&self) -> Rank

fn glwe_layout(&self) -> GLWELayout

impl<D: DataMut> GLWESecretToMut for GLWESecret<D>

fn to_mut(&mut self) -> GLWESecret<&mut [u8]>

impl<D: DataRef> GLWESecretToRef for GLWESecret<D>

fn to_ref(&self) -> GLWESecret<&[u8]>

impl<D: Data> GetDistribution for GLWESecret<D>

fn dist(&self) -> &Distribution

impl<D: Data> LWEInfos for GLWESecret<D>

fn base2k(&self) -> Base2K

fn k(&self) -> TorusPrecision

fn n(&self) -> Degree

fn size(&self) -> usize

fn log_n(&self) -> usize

fn max_k(&self) -> TorusPrecision

fn lwe_layout(&self) -> LWELayout

impl<D: PartialEq + Data> PartialEq for GLWESecret<D>

fn eq(&self, other: &GLWESecret<D>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<D: DataMut> ReaderFrom for GLWESecret<D>

fn read_from<R: Read>(&mut self, reader: &mut R) -> Result<()>

impl<D: DataRef> WriterTo for GLWESecret<D>

fn write_to<W: Write>(&self, writer: &mut W) -> Result<()>

impl<D: Eq + Data> Eq for GLWESecret<D>

impl<D: Data> StructuralPartialEq for GLWESecret<D>