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use crate::crypto::encoding::{Plaintext, PlaintextList};
use crate::crypto::ggsw::GgswCiphertext;
use crate::crypto::glwe::{GlweCiphertext, GlweList};
use crate::crypto::secret::LweSecretKey;
use crate::math::tensor::{AsMutSlice, AsMutTensor, AsRefSlice, AsRefTensor, IntoTensor, Tensor};
use crate::{ck_dim_div, ck_dim_eq};
use crate::crypto::secret::generators::{EncryptionRandomGenerator, SecretRandomGenerator};
use crate::math::polynomial::PolynomialList;
use crate::math::random::{Gaussian, RandomGenerable};
use crate::math::torus::UnsignedTorus;
use concrete_commons::dispersion::DispersionParameter;
use concrete_commons::key_kinds::{
BinaryKeyKind, GaussianKeyKind, KeyKind, TernaryKeyKind, UniformKeyKind,
};
use concrete_commons::numeric::Numeric;
use concrete_commons::parameters::{GlweDimension, PlaintextCount, PolynomialSize};
#[cfg(feature = "multithread")]
use rayon::{iter::IndexedParallelIterator, prelude::*};
use serde::{Deserialize, Serialize};
use std::marker::PhantomData;
use std::ops::Add;
/// A GLWE secret key
#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
pub struct GlweSecretKey<Kind, Container>
where
Kind: KeyKind,
{
tensor: Tensor<Container>,
poly_size: PolynomialSize,
kind: PhantomData<Kind>,
}
impl<Scalar> GlweSecretKey<BinaryKeyKind, Vec<Scalar>>
where
Scalar: UnsignedTorus,
{
/// Allocates a container for a new key, and fills it with random binary values.
///
/// # Example
///
/// ```rust
/// use concrete_commons::key_kinds::BinaryKeyKind;
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let mut generator = SecretRandomGenerator::new(None);
/// let secret_key: GlweSecretKey<BinaryKeyKind, Vec<u32>> =
/// GlweSecretKey::generate_binary(GlweDimension(256), PolynomialSize(10), &mut generator);
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(10));
/// ```
pub fn generate_binary(
dimension: GlweDimension,
poly_size: PolynomialSize,
generator: &mut SecretRandomGenerator,
) -> Self {
GlweSecretKey {
tensor: generator.random_binary_tensor(poly_size.0 * dimension.0),
poly_size,
kind: PhantomData,
}
}
}
impl<Scalar> GlweSecretKey<TernaryKeyKind, Vec<Scalar>>
where
Scalar: UnsignedTorus,
{
/// Allocates a container for a new key, and fill it with random ternary values.
///
/// # Example
///
/// ```rust
/// use concrete_commons::key_kinds::TernaryKeyKind;
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key: GlweSecretKey<_, Vec<u32>> = GlweSecretKey::generate_ternary(
/// GlweDimension(256),
/// PolynomialSize(10),
/// &mut secret_generator,
/// );
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(10));
/// ```
pub fn generate_ternary(
dimension: GlweDimension,
poly_size: PolynomialSize,
generator: &mut SecretRandomGenerator,
) -> Self {
GlweSecretKey {
tensor: generator.random_ternary_tensor(poly_size.0 * dimension.0),
poly_size,
kind: PhantomData,
}
}
}
impl<Scalar> GlweSecretKey<GaussianKeyKind, Vec<Scalar>>
where
(Scalar, Scalar): RandomGenerable<Gaussian<f64>>,
Scalar: UnsignedTorus,
{
/// Allocates a container for a new key, and fill it with random gaussian values.
///
/// # Example
///
/// ```rust
/// use concrete_commons::key_kinds::GaussianKeyKind;
/// use concrete_commons::parameters::{GlweDimension, LweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key: GlweSecretKey<GaussianKeyKind, Vec<u32>> = GlweSecretKey::generate_gaussian(
/// GlweDimension(256),
/// PolynomialSize(10),
/// &mut secret_generator,
/// );
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(10));
/// ```
pub fn generate_gaussian(
dimension: GlweDimension,
poly_size: PolynomialSize,
generator: &mut SecretRandomGenerator,
) -> Self {
GlweSecretKey {
tensor: generator.random_gaussian_tensor(poly_size.0 * dimension.0),
poly_size,
kind: PhantomData,
}
}
}
impl<Scalar> GlweSecretKey<UniformKeyKind, Vec<Scalar>>
where
Scalar: UnsignedTorus,
{
/// Allocates a container for a new key, and fill it with random uniform values.
///
/// # Example
///
/// ```rust
/// use concrete_commons::key_kinds::UniformKeyKind;
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key: GlweSecretKey<UniformKeyKind, Vec<u32>> = GlweSecretKey::generate_uniform(
/// GlweDimension(256),
/// PolynomialSize(10),
/// &mut secret_generator,
/// );
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(10));
/// ```
pub fn generate_uniform(
dimension: GlweDimension,
poly_size: PolynomialSize,
generator: &mut SecretRandomGenerator,
) -> Self {
GlweSecretKey {
tensor: generator.random_uniform_tensor(poly_size.0 * dimension.0),
poly_size,
kind: PhantomData,
}
}
}
impl<Cont> GlweSecretKey<BinaryKeyKind, Cont> {
/// Creates a binary key from a container.
///
/// # Notes
///
/// This method does not fill the container with random data. It merely wraps the container in
/// the appropriate type. For a method that generate a new random key see
/// [`GlweSecretKey::generate_binary`].
///
/// # Example
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let secret_key =
/// GlweSecretKey::binary_from_container(vec![0 as u8; 11 * 256], PolynomialSize(11));
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(11));
/// ```
pub fn binary_from_container(cont: Cont, poly_size: PolynomialSize) -> Self
where
Cont: AsRefSlice,
{
ck_dim_div!(cont.as_slice().len() => poly_size.0);
GlweSecretKey {
tensor: Tensor::from_container(cont),
poly_size,
kind: PhantomData,
}
}
}
impl<Cont> GlweSecretKey<TernaryKeyKind, Cont> {
/// Creates a ternary key from a container.
///
/// # Notes
///
/// This method does not fill the container with random data. It merely wraps the container in
/// the appropriate type. For a method that generate a new random key see
/// [`GlweSecretKey::generate_ternary`].
///
/// # Example
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let secret_key =
/// GlweSecretKey::ternary_from_container(vec![0 as u8; 11 * 256], PolynomialSize(11));
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(11));
/// ```
pub fn ternary_from_container(cont: Cont, poly_size: PolynomialSize) -> Self
where
Cont: AsRefSlice,
{
ck_dim_div!(cont.as_slice().len() => poly_size.0);
GlweSecretKey {
tensor: Tensor::from_container(cont),
poly_size,
kind: PhantomData,
}
}
}
impl<Cont> GlweSecretKey<GaussianKeyKind, Cont> {
/// Creates a gaussian key from a container.
///
/// # Notes
///
/// This method does not fill the container with random data. It merely wraps the container in
/// the appropriate type. For a method that generate a new random key see
/// [`GlweSecretKey::generate_gaussian`].
///
/// # Example
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let secret_key =
/// GlweSecretKey::binary_from_container(vec![0 as u8; 11 * 256], PolynomialSize(11));
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(11));
/// ```
pub fn gaussian_from_container(cont: Cont, poly_size: PolynomialSize) -> Self
where
Cont: AsRefSlice,
{
ck_dim_div!(cont.as_slice().len() => poly_size.0);
GlweSecretKey {
tensor: Tensor::from_container(cont),
poly_size,
kind: PhantomData,
}
}
}
impl<Cont> GlweSecretKey<UniformKeyKind, Cont> {
/// Creates a uniform key from a container.
///
/// # Notes
///
/// This method does not fill the container with random data. It merely wraps the container in
/// the appropriate type. For a method that generate a new random key see
/// [`GlweSecretKey::generate_uniform`].
///
/// # Example
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let secret_key =
/// GlweSecretKey::binary_from_container(vec![0 as u8; 11 * 256], PolynomialSize(11));
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(11));
/// ```
pub fn uniform_from_container(cont: Cont, poly_size: PolynomialSize) -> Self
where
Cont: AsRefSlice,
{
ck_dim_div!(cont.as_slice().len() => poly_size.0);
GlweSecretKey {
tensor: Tensor::from_container(cont),
poly_size,
kind: PhantomData,
}
}
}
impl<Kind, Scalar> GlweSecretKey<Kind, Vec<Scalar>>
where
Kind: KeyKind,
{
/// Consumes the current GLWE secret key and turns it into an LWE secret key.
///
/// # Examples
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, LweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::GlweSecretKey;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let glwe_secret_key: GlweSecretKey<_, Vec<u32>> =
/// GlweSecretKey::generate_binary(GlweDimension(2), PolynomialSize(10), &mut secret_generator);
/// let lwe_secret_key = glwe_secret_key.into_lwe_secret_key();
/// assert_eq!(lwe_secret_key.key_size(), LweDimension(20))
/// ```
pub fn into_lwe_secret_key(self) -> LweSecretKey<Kind, Vec<Scalar>> {
LweSecretKey {
tensor: self.tensor,
kind: PhantomData,
}
}
}
impl<Kind, Cont> GlweSecretKey<Kind, Cont>
where
Kind: KeyKind,
{
/// Returns the size of the secret key.
///
/// This is equivalent to the number of masks in the [`GlweCiphertext`].
///
/// # Example
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key: GlweSecretKey<_, Vec<u32>> = GlweSecretKey::generate_binary(
/// GlweDimension(256),
/// PolynomialSize(10),
/// &mut secret_generator,
/// );
/// assert_eq!(secret_key.key_size(), GlweDimension(256));
/// ```
pub fn key_size(&self) -> GlweDimension
where
Self: AsRefTensor,
{
GlweDimension(self.as_tensor().len() / self.poly_size.0)
}
/// Returns the size of the secret key polynomials.
///
/// # Example
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key: GlweSecretKey<_, Vec<u32>> = GlweSecretKey::generate_binary(
/// GlweDimension(256),
/// PolynomialSize(10),
/// &mut secret_generator,
/// );
/// assert_eq!(secret_key.polynomial_size(), PolynomialSize(10));
/// ```
pub fn polynomial_size(&self) -> PolynomialSize {
self.poly_size
}
/// Returns a borrowed polynomial list from the current key.
///
/// # Example
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, PolynomialCount, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key: GlweSecretKey<_, Vec<u32>> = GlweSecretKey::generate_binary(
/// GlweDimension(256),
/// PolynomialSize(10),
/// &mut secret_generator,
/// );
/// let poly = secret_key.as_polynomial_list();
/// assert_eq!(poly.polynomial_count(), PolynomialCount(256));
/// assert_eq!(poly.polynomial_size(), PolynomialSize(10));
/// ```
pub fn as_polynomial_list(&self) -> PolynomialList<&[<Self as AsRefTensor>::Element]>
where
Self: AsRefTensor,
{
PolynomialList::from_container(self.as_tensor().as_slice(), self.poly_size)
}
/// Returns a mutably borrowed polynomial list from the current key.
///
/// # Example
///
/// ```rust
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::crypto::secret::generators::SecretRandomGenerator;
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// use concrete_core::math::tensor::{AsMutTensor, AsRefTensor};
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let mut secret_key: GlweSecretKey<_, Vec<u32>> = GlweSecretKey::generate_binary(
/// GlweDimension(256),
/// PolynomialSize(10),
/// &mut secret_generator,
/// );
/// let mut poly = secret_key.as_mut_polynomial_list();
/// poly.as_mut_tensor().fill_with_element(1);
/// assert!(secret_key.as_tensor().iter().all(|a| *a == 1));
/// ```
pub fn as_mut_polynomial_list(
&mut self,
) -> PolynomialList<&mut [<Self as AsRefTensor>::Element]>
where
Self: AsMutTensor,
{
let poly_size = self.poly_size;
PolynomialList::from_container(self.as_mut_tensor().as_mut_slice(), poly_size)
}
/// Encrypts a single GLWE ciphertext.
///
/// # Example
///
/// ```rust
/// use concrete_commons::dispersion::LogStandardDev;
/// use concrete_commons::parameters::{GlweDimension, GlweSize, PolynomialSize};
/// use concrete_core::crypto::encoding::PlaintextList;
/// use concrete_core::crypto::glwe::GlweCiphertext;
/// use concrete_core::crypto::secret::generators::{
/// EncryptionRandomGenerator, SecretRandomGenerator,
/// };
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// use concrete_core::math::tensor::{AsMutTensor, AsRefTensor};
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key = GlweSecretKey::generate_binary(
/// GlweDimension(256),
/// PolynomialSize(5),
/// &mut secret_generator,
/// );
/// let noise = LogStandardDev::from_log_standard_dev(-25.);
/// let plaintexts =
/// PlaintextList::from_container(vec![100000 as u32, 200000, 300000, 400000, 500000]);
/// let mut ciphertext = GlweCiphertext::allocate(0 as u32, PolynomialSize(5), GlweSize(257));
/// let mut encryption_generator = EncryptionRandomGenerator::new(None);
/// secret_key.encrypt_glwe(
/// &mut ciphertext,
/// &plaintexts,
/// noise,
/// &mut encryption_generator,
/// );
/// let mut decrypted = PlaintextList::from_container(vec![0 as u32, 0, 0, 0, 0]);
/// secret_key.decrypt_glwe(&mut decrypted, &ciphertext);
/// for (dec, plain) in decrypted.plaintext_iter().zip(plaintexts.plaintext_iter()) {
/// let d0 = dec.0.wrapping_sub(plain.0);
/// let d1 = plain.0.wrapping_sub(dec.0);
/// let dist = std::cmp::min(d0, d1);
/// assert!(dist < 400, "dist: {:?}", dist);
/// }
/// ```
pub fn encrypt_glwe<Cont1, Cont2, Scalar>(
&self,
encrypted: &mut GlweCiphertext<Cont1>,
encoded: &PlaintextList<Cont2>,
noise_parameter: impl DispersionParameter,
generator: &mut EncryptionRandomGenerator,
) where
Self: AsRefTensor<Element = Scalar>,
GlweCiphertext<Cont1>: AsMutTensor<Element = Scalar>,
PlaintextList<Cont2>: AsRefTensor<Element = Scalar>,
Scalar: UnsignedTorus,
{
ck_dim_eq!(encoded.count().0 => encrypted.polynomial_size().0);
ck_dim_eq!(encrypted.mask_size().0 => self.key_size().0);
let (mut body, mut masks) = encrypted.get_mut_body_and_mask();
generator.fill_tensor_with_random_noise(&mut body, noise_parameter);
generator.fill_tensor_with_random_mask(&mut masks);
body.as_mut_polynomial().update_with_wrapping_add_multisum(
&masks.as_mut_polynomial_list(),
&self.as_polynomial_list(),
);
body.as_mut_polynomial()
.update_with_wrapping_add(&encoded.as_polynomial());
}
/// Encrypts a zero plaintext into a GLWE ciphertext.
///
/// # Example
///
/// ```rust
/// use concrete_commons::dispersion::LogStandardDev;
/// use concrete_commons::parameters::{GlweDimension, GlweSize, PolynomialSize};
/// use concrete_core::crypto::encoding::PlaintextList;
/// use concrete_core::crypto::glwe::GlweCiphertext;
/// use concrete_core::crypto::secret::generators::{
/// EncryptionRandomGenerator, SecretRandomGenerator,
/// };
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// use concrete_core::math::tensor::{AsMutTensor, AsRefTensor};
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key = GlweSecretKey::generate_binary(
/// GlweDimension(256),
/// PolynomialSize(5),
/// &mut secret_generator,
/// );
/// let noise = LogStandardDev::from_log_standard_dev(-25.);
/// let mut ciphertext = GlweCiphertext::allocate(0 as u32, PolynomialSize(5), GlweSize(257));
/// let mut encryption_generator = EncryptionRandomGenerator::new(None);
/// secret_key.encrypt_zero_glwe(&mut ciphertext, noise, &mut encryption_generator);
/// let mut decrypted = PlaintextList::from_container(vec![0 as u32, 0, 0, 0, 0]);
/// secret_key.decrypt_glwe(&mut decrypted, &ciphertext);
/// for dec in decrypted.plaintext_iter() {
/// let d0 = dec.0.wrapping_sub(0u32);
/// let d1 = 0u32.wrapping_sub(dec.0);
/// let dist = std::cmp::min(d0, d1);
/// assert!(dist < 500, "dist: {:?}", dist);
/// }
/// ```
pub fn encrypt_zero_glwe<Scalar, Cont1>(
&self,
encrypted: &mut GlweCiphertext<Cont1>,
noise_parameters: impl DispersionParameter,
generator: &mut EncryptionRandomGenerator,
) where
Self: AsRefTensor<Element = Scalar>,
GlweCiphertext<Cont1>: AsMutTensor<Element = Scalar>,
Scalar: UnsignedTorus,
{
ck_dim_eq!(encrypted.mask_size().0 => self.key_size().0);
let (mut body, mut masks) = encrypted.get_mut_body_and_mask();
generator.fill_tensor_with_random_noise(&mut body, noise_parameters);
generator.fill_tensor_with_random_mask(&mut masks);
body.as_mut_polynomial().update_with_wrapping_add_multisum(
&masks.as_mut_polynomial_list(),
&self.as_polynomial_list(),
);
}
/// Encrypts a list of GLWE ciphertexts.
///
/// # Example
///
/// ```rust
/// use concrete_commons::dispersion::LogStandardDev;
/// use concrete_commons::parameters::{CiphertextCount, GlweDimension, PolynomialSize};
/// use concrete_core::crypto::encoding::PlaintextList;
/// use concrete_core::crypto::glwe::{GlweCiphertext, GlweList};
/// use concrete_core::crypto::secret::generators::{
/// EncryptionRandomGenerator, SecretRandomGenerator,
/// };
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// use concrete_core::math::tensor::{AsMutTensor, AsRefTensor};
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key = GlweSecretKey::generate_binary(
/// GlweDimension(256),
/// PolynomialSize(2),
/// &mut secret_generator,
/// );
/// let noise = LogStandardDev::from_log_standard_dev(-25.);
/// let plaintexts = PlaintextList::from_container(vec![1000 as u32, 2000, 3000, 4000]);
/// let mut ciphertexts = GlweList::allocate(
/// 0 as u32,
/// PolynomialSize(2),
/// GlweDimension(256),
/// CiphertextCount(2),
/// );
/// let mut encryption_generator = EncryptionRandomGenerator::new(None);
/// secret_key.encrypt_glwe_list(
/// &mut ciphertexts,
/// &plaintexts,
/// noise,
/// &mut encryption_generator,
/// );
/// let mut decrypted = PlaintextList::from_container(vec![0 as u32, 0, 0, 0]);
/// secret_key.decrypt_glwe_list(&mut decrypted, &ciphertexts);
/// for (dec, plain) in decrypted.plaintext_iter().zip(plaintexts.plaintext_iter()) {
/// let d0 = dec.0.wrapping_sub(plain.0);
/// let d1 = plain.0.wrapping_sub(dec.0);
/// let dist = std::cmp::min(d0, d1);
/// assert!(dist < 400, "dist: {:?}", dist);
/// }
/// ```
pub fn encrypt_glwe_list<CiphCont, EncCont, Scalar>(
&self,
encrypt: &mut GlweList<CiphCont>,
encoded: &PlaintextList<EncCont>,
noise_parameters: impl DispersionParameter,
generator: &mut EncryptionRandomGenerator,
) where
Self: AsRefTensor<Element = Scalar>,
GlweList<CiphCont>: AsMutTensor<Element = Scalar>,
PlaintextList<EncCont>: AsRefTensor<Element = Scalar>,
Scalar: UnsignedTorus,
for<'a> PlaintextList<&'a [Scalar]>: AsRefTensor<Element = Scalar>,
{
ck_dim_eq!(encrypt.ciphertext_count().0 * encrypt.polynomial_size().0 => encoded.count().0);
ck_dim_eq!(encrypt.glwe_dimension().0 => self.key_size().0);
let count = PlaintextCount(encrypt.polynomial_size().0);
for (mut ciphertext, encoded) in encrypt
.ciphertext_iter_mut()
.zip(encoded.sublist_iter(count))
{
self.encrypt_glwe(&mut ciphertext, &encoded, noise_parameters, generator);
}
}
/// Encrypts a list of GLWE ciphertexts, with a zero plaintext.
///
/// # Example
///
/// ```rust
/// use concrete_commons::dispersion::LogStandardDev;
/// use concrete_commons::parameters::{CiphertextCount, GlweDimension, PolynomialSize};
/// use concrete_core::crypto::encoding::PlaintextList;
/// use concrete_core::crypto::glwe::{GlweCiphertext, GlweList};
/// use concrete_core::crypto::secret::generators::{
/// EncryptionRandomGenerator, SecretRandomGenerator,
/// };
/// use concrete_core::crypto::secret::*;
/// use concrete_core::crypto::*;
/// use concrete_core::math::tensor::{AsMutTensor, AsRefTensor};
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key = GlweSecretKey::generate_binary(
/// GlweDimension(256),
/// PolynomialSize(2),
/// &mut secret_generator,
/// );
/// let noise = LogStandardDev::from_log_standard_dev(-25.);
/// let mut ciphertexts = GlweList::allocate(
/// 0 as u32,
/// PolynomialSize(2),
/// GlweDimension(256),
/// CiphertextCount(2),
/// );
/// let mut encryption_generator = EncryptionRandomGenerator::new(None);
/// secret_key.encrypt_zero_glwe_list(&mut ciphertexts, noise, &mut encryption_generator);
/// let mut decrypted = PlaintextList::from_container(vec![0 as u32, 0, 0, 0]);
/// secret_key.decrypt_glwe_list(&mut decrypted, &ciphertexts);
/// for dec in decrypted.plaintext_iter() {
/// let d0 = dec.0.wrapping_sub(0u32);
/// let d1 = 0u32.wrapping_sub(dec.0);
/// let dist = std::cmp::min(d0, d1);
/// assert!(dist < 400, "dist: {:?}", dist);
/// }
/// ```
pub fn encrypt_zero_glwe_list<Scalar, OutputCont>(
&self,
encrypted: &mut GlweList<OutputCont>,
noise_parameters: impl DispersionParameter,
generator: &mut EncryptionRandomGenerator,
) where
Self: AsRefTensor<Element = Scalar>,
GlweList<OutputCont>: AsMutTensor<Element = Scalar>,
Scalar: UnsignedTorus + Add,
{
for mut ciphertext in encrypted.ciphertext_iter_mut() {
self.encrypt_zero_glwe(&mut ciphertext, noise_parameters, generator);
}
}
/// Decrypts a single GLWE ciphertext.
///
/// See ['GlweSecretKey::encrypt_glwe`] for an example.
pub fn decrypt_glwe<CiphCont, EncCont, Scalar>(
&self,
encoded: &mut PlaintextList<EncCont>,
encrypted: &GlweCiphertext<CiphCont>,
) where
Self: AsRefTensor<Element = Scalar>,
PlaintextList<EncCont>: AsMutTensor<Element = Scalar>,
GlweCiphertext<CiphCont>: AsRefTensor<Element = Scalar>,
Scalar: UnsignedTorus + Add,
{
ck_dim_eq!(encoded.count().0 => encrypted.polynomial_size().0);
let (body, masks) = encrypted.get_body_and_mask();
encoded
.as_mut_tensor()
.fill_with_one(body.as_tensor(), |a| *a);
encoded
.as_mut_polynomial()
.update_with_wrapping_sub_multisum(
&masks.as_polynomial_list(),
&self.as_polynomial_list(),
);
}
/// Decrypts a list of GLWE ciphertexts.
///
/// See ['GlweSecretKey::encrypt_glwe_list`] for an example.
pub fn decrypt_glwe_list<CiphCont, EncCont, Scalar>(
&self,
encoded: &mut PlaintextList<EncCont>,
encrypted: &GlweList<CiphCont>,
) where
Self: AsRefTensor<Element = Scalar>,
PlaintextList<EncCont>: AsMutTensor<Element = Scalar>,
GlweList<CiphCont>: AsRefTensor<Element = Scalar>,
Scalar: UnsignedTorus + Add,
for<'a> PlaintextList<&'a mut [Scalar]>: AsMutTensor<Element = Scalar>,
{
ck_dim_eq!(encrypted.ciphertext_count().0 * encrypted.polynomial_size().0 => encoded.count().0);
ck_dim_eq!(encrypted.glwe_dimension().0 => self.key_size().0);
for (ciphertext, mut encoded) in encrypted
.ciphertext_iter()
.zip(encoded.sublist_iter_mut(PlaintextCount(encrypted.polynomial_size().0)))
{
self.decrypt_glwe(&mut encoded, &ciphertext);
}
}
/// This function encrypts a message as a GGSW ciphertext.
///
/// # Examples
///
/// ```rust
/// use concrete_commons::dispersion::LogStandardDev;
/// use concrete_commons::parameters::{
/// DecompositionBaseLog, DecompositionLevelCount, GlweDimension, GlweSize, PolynomialSize,
/// };
/// use concrete_core::crypto::encoding::Plaintext;
/// use concrete_core::crypto::ggsw::GgswCiphertext;
/// use concrete_core::crypto::secret::generators::{
/// EncryptionRandomGenerator, SecretRandomGenerator,
/// };
/// use concrete_core::crypto::secret::GlweSecretKey;
/// let mut generator = SecretRandomGenerator::new(None);
/// let secret_key =
/// GlweSecretKey::generate_binary(GlweDimension(2), PolynomialSize(10), &mut generator);
/// let mut ciphertext = GgswCiphertext::allocate(
/// 0 as u32,
/// PolynomialSize(10),
/// GlweSize(3),
/// DecompositionLevelCount(3),
/// DecompositionBaseLog(7),
/// );
/// let noise = LogStandardDev::from_log_standard_dev(-15.);
/// let mut secret_generator = EncryptionRandomGenerator::new(None);
/// secret_key.encrypt_constant_ggsw(
/// &mut ciphertext,
/// &Plaintext(10),
/// noise,
/// &mut secret_generator,
/// );
/// ```
pub fn encrypt_constant_ggsw<OutputCont, Scalar>(
&self,
encrypted: &mut GgswCiphertext<OutputCont>,
encoded: &Plaintext<Scalar>,
noise_parameters: impl DispersionParameter,
generator: &mut EncryptionRandomGenerator,
) where
Self: AsRefTensor<Element = Scalar>,
GgswCiphertext<OutputCont>: AsMutTensor<Element = Scalar>,
OutputCont: AsMutSlice<Element = Scalar>,
Scalar: UnsignedTorus,
{
ck_dim_eq!(self.polynomial_size() => encrypted.polynomial_size());
ck_dim_eq!(self.key_size() => encrypted.glwe_size().to_glwe_dimension());
let gen_iter = generator
.fork_ggsw_to_ggsw_levels::<Scalar>(
encrypted.decomposition_level_count(),
self.key_size().to_glwe_size(),
self.poly_size,
)
.expect("Failed to split generator into ggsw levels");
let base_log = encrypted.decomposition_base_log();
for (mut matrix, mut generator) in encrypted.level_matrix_iter_mut().zip(gen_iter) {
let decomposition = encoded.0
* (Scalar::ONE
<< (<Scalar as Numeric>::BITS
- (base_log.0 * (matrix.decomposition_level().0))));
let gen_iter = generator
.fork_ggsw_level_to_glwe::<Scalar>(self.key_size().to_glwe_size(), self.poly_size)
.expect("Failed to split generator into rlwe");
// We iterate over the rowe of the level matrix
for ((index, row), mut generator) in matrix.row_iter_mut().enumerate().zip(gen_iter) {
let mut rlwe_ct = row.into_glwe();
// We issue a fresh encryption of zero
self.encrypt_zero_glwe(&mut rlwe_ct, noise_parameters, &mut generator);
// We retrieve the row as a polynomial list
let mut polynomial_list = rlwe_ct.into_polynomial_list();
// We retrieve the polynomial in the diagonal
let mut level_polynomial = polynomial_list.get_mut_polynomial(index);
// We get the first coefficient
let first_coef = level_polynomial.as_mut_tensor().first_mut();
// We update the first coefficient
*first_coef = first_coef.wrapping_add(decomposition);
}
}
}
/// This function encrypts a message as a GGSW ciphertext, using as many threads as possible.
///
/// # Notes
/// This method is hidden behind the "multithread" feature gate.
///
/// # Examples
///
/// ```rust
/// use concrete_commons::dispersion::LogStandardDev;
/// use concrete_commons::parameters::{
/// DecompositionBaseLog, DecompositionLevelCount, GlweDimension, GlweSize, PolynomialSize,
/// };
/// use concrete_core::crypto::encoding::Plaintext;
/// use concrete_core::crypto::ggsw::GgswCiphertext;
/// use concrete_core::crypto::secret::generators::{
/// EncryptionRandomGenerator, SecretRandomGenerator,
/// };
/// use concrete_core::crypto::secret::GlweSecretKey;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key =
/// GlweSecretKey::generate_binary(GlweDimension(2), PolynomialSize(10), &mut secret_generator);
/// let mut ciphertext = GgswCiphertext::allocate(
/// 0 as u32,
/// PolynomialSize(10),
/// GlweSize(3),
/// DecompositionLevelCount(3),
/// DecompositionBaseLog(7),
/// );
/// let noise = LogStandardDev::from_log_standard_dev(-15.);
/// let mut encryption_generator = EncryptionRandomGenerator::new(None);
/// secret_key.par_encrypt_constant_ggsw(
/// &mut ciphertext,
/// &Plaintext(10),
/// noise,
/// &mut encryption_generator,
/// );
/// ```
#[cfg(feature = "multithread")]
pub fn par_encrypt_constant_ggsw<OutputCont, Scalar>(
&self,
encrypted: &mut GgswCiphertext<OutputCont>,
encoded: &Plaintext<Scalar>,
noise_parameters: impl DispersionParameter + Send + Sync,
generator: &mut EncryptionRandomGenerator,
) where
Self: AsRefTensor<Element = Scalar>,
GgswCiphertext<OutputCont>: AsMutTensor<Element = Scalar>,
OutputCont: AsMutSlice<Element = Scalar>,
Scalar: UnsignedTorus + Send + Sync,
Cont: Sync,
{
ck_dim_eq!(self.polynomial_size() => encrypted.polynomial_size());
ck_dim_eq!(self.key_size() => encrypted.glwe_size().to_glwe_dimension());
let generators = generator
.par_fork_ggsw_to_ggsw_levels::<Scalar>(
encrypted.decomposition_level_count(),
self.key_size().to_glwe_size(),
self.poly_size,
)
.expect("Failed to split generator into ggsw levels");
let base_log = encrypted.decomposition_base_log();
encrypted
.par_level_matrix_iter_mut()
.zip(generators)
.for_each(move |(mut matrix, mut generator)| {
let decomposition = encoded.0
* (Scalar::ONE
<< (<Scalar as Numeric>::BITS
- (base_log.0 * (matrix.decomposition_level().0))));
let gen_iter = generator
.par_fork_ggsw_level_to_glwe::<Scalar>(
self.key_size().to_glwe_size(),
self.poly_size,
)
.expect("Failed to split generator into glwe");
// We iterate over the rowe of the level matrix
matrix
.par_row_iter_mut()
.enumerate()
.zip(gen_iter)
.for_each(|((index, row), mut generator)| {
let mut rlwe_ct = row.into_glwe();
// We issue a fresh encryption of zero
self.encrypt_zero_glwe(&mut rlwe_ct, noise_parameters, &mut generator);
// We retrieve the row as a polynomial list
let mut polynomial_list = rlwe_ct.into_polynomial_list();
// We retrieve the polynomial in the diagonal
let mut level_polynomial = polynomial_list.get_mut_polynomial(index);
// We get the first coefficient
let first_coef = level_polynomial.as_mut_tensor().first_mut();
// We update the first coefficient
*first_coef = first_coef.wrapping_add(decomposition);
})
})
}
/// This function encrypts a message as a GGSW ciphertext whose rlwe masks are all zeros.
///
/// # Examples
///
/// ```rust
/// use concrete_commons::dispersion::LogStandardDev;
/// use concrete_commons::parameters::{
/// DecompositionBaseLog, DecompositionLevelCount, GlweDimension, GlweSize, PolynomialSize,
/// };
/// use concrete_core::crypto::encoding::Plaintext;
/// use concrete_core::crypto::ggsw::GgswCiphertext;
/// use concrete_core::crypto::secret::generators::{
/// EncryptionRandomGenerator, SecretRandomGenerator,
/// };
/// use concrete_core::crypto::secret::GlweSecretKey;
/// let mut secret_generator = SecretRandomGenerator::new(None);
/// let secret_key: GlweSecretKey<_, Vec<u32>> =
/// GlweSecretKey::generate_binary(GlweDimension(2), PolynomialSize(10), &mut secret_generator);
/// let mut ciphertext = GgswCiphertext::allocate(
/// 0 as u32,
/// PolynomialSize(10),
/// GlweSize(3),
/// DecompositionLevelCount(3),
/// DecompositionBaseLog(7),
/// );
/// let noise = LogStandardDev::from_log_standard_dev(-15.);
/// let mut encryption_generator = EncryptionRandomGenerator::new(None);
/// secret_key.trivial_encrypt_constant_ggsw(
/// &mut ciphertext,
/// &Plaintext(10),
/// noise,
/// &mut encryption_generator,
/// );
/// ```
pub fn trivial_encrypt_constant_ggsw<OutputCont, Scalar>(
&self,
encrypted: &mut GgswCiphertext<OutputCont>,
encoded: &Plaintext<Scalar>,
noise_parameters: impl DispersionParameter,
generator: &mut EncryptionRandomGenerator,
) where
Self: AsRefTensor<Element = Scalar>,
GgswCiphertext<OutputCont>: AsMutTensor<Element = Scalar>,
OutputCont: AsMutSlice<Element = Scalar>,
Scalar: UnsignedTorus,
{
ck_dim_eq!(self.polynomial_size() => encrypted.polynomial_size());
ck_dim_eq!(self.key_size() => encrypted.glwe_size().to_glwe_dimension());
// We fill the ggsw with trivial glwe encryptions of zero:
for mut glwe in encrypted.as_mut_glwe_list().ciphertext_iter_mut() {
let (mut body, mut mask) = glwe.get_mut_body_and_mask();
mask.as_mut_tensor().fill_with_element(Scalar::ZERO);
generator.fill_tensor_with_random_noise(&mut body, noise_parameters);
}
let base_log = encrypted.decomposition_base_log();
for mut matrix in encrypted.level_matrix_iter_mut() {
let decomposition = encoded.0
* (Scalar::ONE
<< (<Scalar as Numeric>::BITS
- (base_log.0 * (matrix.decomposition_level().0))));
// We iterate over the rowe of the level matrix
for (index, row) in matrix.row_iter_mut().enumerate() {
let rlwe_ct = row.into_glwe();
// We retrieve the row as a polynomial list
let mut polynomial_list = rlwe_ct.into_polynomial_list();
// We retrieve the polynomial in the diagonal
let mut level_polynomial = polynomial_list.get_mut_polynomial(index);
// We get the first coefficient
let first_coef = level_polynomial.as_mut_tensor().first_mut();
// We update the first coefficient
*first_coef = first_coef.wrapping_add(decomposition);
}
}
}
}
impl<Kind, Element, Cont> AsRefTensor for GlweSecretKey<Kind, Cont>
where
Kind: KeyKind,
Cont: AsRefSlice<Element = Element>,
{
type Element = Element;
type Container = Cont;
fn as_tensor(&self) -> &Tensor<Self::Container> {
&self.tensor
}
}
impl<Kind, Element, Cont> AsMutTensor for GlweSecretKey<Kind, Cont>
where
Kind: KeyKind,
Cont: AsMutSlice<Element = Element>,
{
type Element = Element;
type Container = Cont;
fn as_mut_tensor(&mut self) -> &mut Tensor<<Self as AsMutTensor>::Container> {
&mut self.tensor
}
}
impl<Kind, Cont> IntoTensor for GlweSecretKey<Kind, Cont>
where
Kind: KeyKind,
Cont: AsRefSlice,
{
type Element = <Cont as AsRefSlice>::Element;
type Container = Cont;
fn into_tensor(self) -> Tensor<Self::Container> {
self.tensor
}
}