Struct concrete_core::backends::default::entities::LwePackingKeyswitchKey32

pub struct LwePackingKeyswitchKey32(_);

A structure representing a packing keyswitch key with 32 bits of precision.

Trait Implementations

impl AbstractEntity for LwePackingKeyswitchKey32

type Kind = LwePackingKeyswitchKeyKind

The kind of the entity.

impl Clone for LwePackingKeyswitchKey32

fn clone(&self) -> LwePackingKeyswitchKey32

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LwePackingKeyswitchKey32

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

Formats the value using the given formatter.

impl EntityDeserializationEngine<&[u8], LwePackingKeyswitchKey32> for DefaultSerializationEngine

Description:

Implementation of EntityDeserializationEngine for DefaultSerializationEngine that operates on 32 bits integers. It serializes a packing keyswitch key entity.

fn deserialize(
    &mut self,
    serialized: &[u8]
) -> Result<LwePackingKeyswitchKey32, EntityDeserializationError<Self::EngineError>>

Example:

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

// 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: LweSecretKey32 = engine.generate_new_lwe_secret_key(input_lwe_dimension)?;
let output_key: LweSecretKey32 = engine.generate_new_lwe_secret_key(output_lwe_dimension)?;

let packing_keyswitch_key = engine.generate_new_lwe_keyswitch_key(
    &input_key,
    &output_key,
    decomposition_level_count,
    decomposition_base_log,
    noise,
)?;

let mut serialization_engine = DefaultSerializationEngine::new(())?;
let serialized = serialization_engine.serialize(&packing_keyswitch_key)?;
let recovered = serialization_engine.deserialize(serialized.as_slice())?;
assert_eq!(packing_keyswitch_key, recovered);

unsafe fn deserialize_unchecked(
    &mut self,
    serialized: &[u8]
) -> LwePackingKeyswitchKey32

Unsafely deserializes an entity.

impl EntitySerializationEngine<LwePackingKeyswitchKey32, Vec<u8, Global>> for DefaultSerializationEngine

Description:

Implementation of EntitySerializationEngine for DefaultSerializationEngine that operates on 32 bits integers. It serializes a packing keyswitch key entity.

fn serialize(
    &mut self,
    entity: &LwePackingKeyswitchKey32
) -> Result<Vec<u8>, EntitySerializationError<Self::EngineError>>

Example:

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

// 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: LweSecretKey32 = engine.generate_new_lwe_secret_key(input_lwe_dimension)?;
let output_key: LweSecretKey32 = engine.generate_new_lwe_secret_key(output_lwe_dimension)?;

let packing_keyswitch_key = engine.generate_new_lwe_keyswitch_key(
    &input_key,
    &output_key,
    decomposition_level_count,
    decomposition_base_log,
    noise,
)?;

let mut serialization_engine = DefaultSerializationEngine::new(())?;
let serialized = serialization_engine.serialize(&packing_keyswitch_key)?;
let recovered = serialization_engine.deserialize(serialized.as_slice())?;
assert_eq!(packing_keyswitch_key, recovered);

unsafe fn serialize_unchecked(
    &mut self,
    entity: &LwePackingKeyswitchKey32
) -> Vec<u8>

Unsafely serializes an entity.

impl LweCiphertextVectorGlweCiphertextDiscardingPackingKeyswitchEngine<LwePackingKeyswitchKey32, LweCiphertextVector32, GlweCiphertext32> for DefaultEngine

Description:

Implementation of LweCiphertextVectorGlweCiphertextDiscardingPackingKeyswitchEngine for DefaultEngine that operates on 32 bits integers.

fn discard_packing_keyswitch_lwe_ciphertext_vector(
    &mut self,
    output: &mut GlweCiphertext32,
    input: &LweCiphertextVector32,
    ksk: &LwePackingKeyswitchKey32
) -> Result<(), LweCiphertextVectorGlweCiphertextDiscardingPackingKeyswitchError<Self::EngineError>>

Example:

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

// 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 20 bits)
let input_vector = vec![3_u32 << 20, 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: LweSecretKey32 = engine.generate_new_lwe_secret_key(input_lwe_dimension)?;
let output_key: GlweSecretKey32 =
    engine.generate_new_glwe_secret_key(output_glwe_dimension, polynomial_size)?;
let packing_keyswitch_key = engine.generate_new_lwe_packing_keyswitch_key(
    &input_key,
    &output_key,
    decomposition_level_count,
    decomposition_base_log,
    noise,
)?;
let plaintext_vector = engine.create_plaintext_vector_from(&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);

unsafe fn discard_packing_keyswitch_lwe_ciphertext_vector_unchecked(
    &mut self,
    output: &mut GlweCiphertext32,
    input: &LweCiphertextVector32,
    ksk: &LwePackingKeyswitchKey32
)

Unsafely packing keyswitches an LWE ciphertext vector.

impl LwePackingKeyswitchKeyEntity for LwePackingKeyswitchKey32

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 LwePackingKeyswitchKeyGenerationEngine<LweSecretKey32, GlweSecretKey32, LwePackingKeyswitchKey32> for DefaultEngine

Description:

Implementation of LwePackingKeyswitchKeyGenerationEngine for DefaultEngine that operates on 32 bits integers.

fn generate_new_lwe_packing_keyswitch_key(
    &mut self,
    input_key: &LweSecretKey32,
    output_key: &GlweSecretKey32,
    decomposition_level_count: DecompositionLevelCount,
    decomposition_base_log: DecompositionBaseLog,
    noise: Variance
) -> Result<LwePackingKeyswitchKey32, LwePackingKeyswitchKeyGenerationError<Self::EngineError>>

Example:

use concrete_core::prelude::Variance;
use concrete_core::prelude::{
    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 output_polynomial_size = PolynomialSize(512);
let decomposition_level_count = DecompositionLevelCount(2);
let decomposition_base_log = DecompositionBaseLog(8);
let noise = Variance(2_f64.powf(-50.));

// 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: LweSecretKey32 = engine.generate_new_lwe_secret_key(input_lwe_dimension)?;
let output_key: GlweSecretKey32 = engine.generate_new_glwe_secret_key(
    output_glwe_dimension,
    output_polynomial_size
)?;

let packing_keyswitch_key = engine.generate_new_lwe_packing_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_glwe_dimension(), output_glwe_dimension);
assert_eq!(packing_keyswitch_key.output_polynomial_size(), output_polynomial_size);

unsafe fn generate_new_lwe_packing_keyswitch_key_unchecked(
    &mut self,
    input_key: &LweSecretKey32,
    output_key: &GlweSecretKey32,
    decomposition_level_count: DecompositionLevelCount,
    decomposition_base_log: DecompositionBaseLog,
    noise: Variance
) -> LwePackingKeyswitchKey32

Unsafely generates a new packing keyswitch key.

impl PartialEq<LwePackingKeyswitchKey32> for LwePackingKeyswitchKey32

fn eq(&self, other: &LwePackingKeyswitchKey32) -> bool

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

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

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

impl Eq for LwePackingKeyswitchKey32

impl StructuralEq for LwePackingKeyswitchKey32

impl StructuralPartialEq for LwePackingKeyswitchKey32