Struct concrete_core::backends::default::entities::PackingKeyswitchKey64

pub struct PackingKeyswitchKey64(_);

A structure representing a packing keyswitch key with 64 bits of precision.

Trait Implementations

impl AbstractEntity for PackingKeyswitchKey64

type Kind = PackingKeyswitchKeyKind

The kind of the entity.

impl Clone for PackingKeyswitchKey64

fn clone(&self) -> PackingKeyswitchKey64

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PackingKeyswitchKey64

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl DestructionEngine<PackingKeyswitchKey64> for DefaultEngine

fn destroy(
    &mut self,
    entity: PackingKeyswitchKey64
) -> Result<(), DestructionError<Self::EngineError>>

Destroys an entity.

unsafe fn destroy_unchecked(&mut self, entity: &mut PackingKeyswitchKey64)

Unsafely destroys an entity.

impl LweCiphertextVectorGlweCiphertextDiscardingPackingKeyswitchEngine<PackingKeyswitchKey64, LweCiphertextVector64, GlweCiphertext64> for DefaultEngine

Description:

Implementation of LweCiphertextVectorGlweCiphertextDiscardingPackingKeyswitchEngine for DefaultEngine that operates on 64 bits integers.

fn discard_packing_keyswitch_lwe_ciphertext_vector(
    &mut self,
    output: &mut GlweCiphertext64,
    input: &LweCiphertextVector64,
    ksk: &PackingKeyswitchKey64
) -> Result<(), LweCiphertextVectorGlweCiphertextDiscardingPackingKeyswitchError<Self::EngineError>>

Example:

use concrete_commons::dispersion::Variance;
use concrete_commons::parameters::{
    DecompositionBaseLog, DecompositionLevelCount, LweDimension,
};
use concrete_core::prelude::*;

// DISCLAIMER: the parameters used here are only for test purpose, and are not secure.
let input_lwe_dimension = LweDimension(6);
let output_glwe_dimension = GlweDimension(3);
let decomposition_level_count = DecompositionLevelCount(2);
let decomposition_base_log = DecompositionBaseLog(8);
let polynomial_size = PolynomialSize(256);
let noise = Variance(2_f64.powf(-25.));
// Here a hard-set encoding is applied (shift by 50 bits)
let input_vector = vec![3_u64 << 50, 256];

// Unix seeder must be given a secret input.
// Here we just give it 0, which is totally unsafe.
const UNSAFE_SECRET: u128 = 0;
let mut engine = DefaultEngine::new(Box::new(UnixSeeder::new(UNSAFE_SECRET)))?;
let input_key: LweSecretKey64 = engine.create_lwe_secret_key(input_lwe_dimension)?;
let output_key: GlweSecretKey64 =
    engine.create_glwe_secret_key(output_glwe_dimension, polynomial_size)?;
let packing_keyswitch_key = engine.create_packing_keyswitch_key(
    &input_key,
    &output_key,
    decomposition_level_count,
    decomposition_base_log,
    noise,
)?;
let plaintext_vector = engine.create_plaintext_vector(&input_vector)?;
let ciphertext_vector =
    engine.encrypt_lwe_ciphertext_vector(&input_key, &plaintext_vector, noise)?;
let mut ciphertext_output = engine.zero_encrypt_glwe_ciphertext(&output_key, noise)?;

engine.discard_packing_keyswitch_lwe_ciphertext_vector(
    &mut ciphertext_output,
    &ciphertext_vector,
    &packing_keyswitch_key,
)?;
assert_eq!(ciphertext_output.glwe_dimension(), output_glwe_dimension);

engine.destroy(input_key)?;
engine.destroy(output_key)?;
engine.destroy(packing_keyswitch_key)?;
engine.destroy(plaintext_vector)?;
engine.destroy(ciphertext_vector)?;
engine.destroy(ciphertext_output)?;

unsafe fn discard_packing_keyswitch_lwe_ciphertext_vector_unchecked(
    &mut self,
    output: &mut GlweCiphertext64,
    input: &LweCiphertextVector64,
    ksk: &PackingKeyswitchKey64
)

Unsafely packing keyswitches an LWE ciphertext vector.

impl PackingKeyswitchKeyCreationEngine<LweSecretKey64, GlweSecretKey64, PackingKeyswitchKey64> for DefaultEngine

Description:

Implementation of PackingKeyswitchKeyCreationEngine for DefaultEngine that operates on 64 bits integers.

fn create_packing_keyswitch_key(
    &mut self,
    input_key: &LweSecretKey64,
    output_key: &GlweSecretKey64,
    decomposition_level_count: DecompositionLevelCount,
    decomposition_base_log: DecompositionBaseLog,
    noise: Variance
) -> Result<PackingKeyswitchKey64, PackingKeyswitchKeyCreationError<Self::EngineError>>

Example:

use concrete_commons::dispersion::Variance;
use concrete_commons::parameters::{
    DecompositionBaseLog, DecompositionLevelCount, LweDimension,
};
use concrete_core::prelude::*;

// DISCLAIMER: the parameters used here are only for test purpose, and are not secure.
let input_lwe_dimension = LweDimension(6);
let output_lwe_dimension = LweDimension(3);
let decomposition_level_count = DecompositionLevelCount(2);
let decomposition_base_log = DecompositionBaseLog(8);
let noise = Variance(2_f64.powf(-25.));

// Unix seeder must be given a secret input.
// Here we just give it 0, which is totally unsafe.
const UNSAFE_SECRET: u128 = 0;
let mut engine = DefaultEngine::new(Box::new(UnixSeeder::new(UNSAFE_SECRET)))?;
let input_key: LweSecretKey64 = engine.create_lwe_secret_key(input_lwe_dimension)?;
let output_key: LweSecretKey64 = engine.create_lwe_secret_key(output_lwe_dimension)?;

let packing_keyswitch_key = engine.create_lwe_keyswitch_key(
    &input_key,
    &output_key,
    decomposition_level_count,
    decomposition_base_log,
    noise,
)?;
assert_eq!(
assert_eq!(
assert_eq!(packing_keyswitch_key.input_lwe_dimension(), input_lwe_dimension);
assert_eq!(packing_keyswitch_key.output_lwe_dimension(), output_lwe_dimension);

engine.destroy(input_key)?;
engine.destroy(output_key)?;
engine.destroy(packing_keyswitch_key)?;

unsafe fn create_packing_keyswitch_key_unchecked(
    &mut self,
    input_key: &LweSecretKey64,
    output_key: &GlweSecretKey64,
    decomposition_level_count: DecompositionLevelCount,
    decomposition_base_log: DecompositionBaseLog,
    noise: Variance
) -> PackingKeyswitchKey64

Unsafely creates a packing keyswitch key.

impl PackingKeyswitchKeyEntity for PackingKeyswitchKey64

type InputKeyDistribution = BinaryKeyDistribution

The distribution of the key the input ciphertext is encrypted with.

type OutputKeyDistribution = BinaryKeyDistribution

The distribution of the key the output ciphertext is encrypted with.

fn input_lwe_dimension(&self) -> LweDimension

Returns the input LWE dimension of the key.

fn output_glwe_dimension(&self) -> GlweDimension

Returns the output GLWE dimension of the key.

fn output_polynomial_size(&self) -> PolynomialSize

Returns the output polynomial degree of the key.

fn decomposition_level_count(&self) -> DecompositionLevelCount

Returns the number of decomposition levels of the key.

fn decomposition_base_log(&self) -> DecompositionBaseLog

Returns the logarithm of the base used in the key.

impl PartialEq<PackingKeyswitchKey64> for PackingKeyswitchKey64

fn eq(&self, other: &PackingKeyswitchKey64) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &PackingKeyswitchKey64) -> bool

This method tests for !=.

impl Eq for PackingKeyswitchKey64

impl StructuralEq for PackingKeyswitchKey64

impl StructuralPartialEq for PackingKeyswitchKey64