Struct FunctionalPackingKeyswitchKey32 

pub struct FunctionalPackingKeyswitchKey32(/* private fields */);

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

Trait Implementations

impl AbstractEntity for FunctionalPackingKeyswitchKey32

type Kind = FunctionalPackingKeyswitchKeyKind

The kind of the entity.

impl Clone for FunctionalPackingKeyswitchKey32

fn clone(&self) -> FunctionalPackingKeyswitchKey32

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FunctionalPackingKeyswitchKey32

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

Formats the value using the given formatter.

impl DestructionEngine<FunctionalPackingKeyswitchKey32> for CoreEngine

fn destroy( &mut self, entity: FunctionalPackingKeyswitchKey32, ) -> Result<(), DestructionError<Self::EngineError>>

Destroys an entity.

unsafe fn destroy_unchecked( &mut self, entity: &mut FunctionalPackingKeyswitchKey32, )

Unsafely destroys an entity.

impl FunctionalPackingKeyswitchKeyCreationEngine<LweSecretKey32, GlweSecretKey32, FunctionalPackingKeyswitchKey32, CleartextVector32, u32> for CoreEngine

Description:

Implementation of FunctionalPackingKeyswitchKeyCreationEngine for CoreEngine that operates on 32 bits integers.

fn create_functional_packing_keyswitch_key<F: Fn(u32) -> u32>( &mut self, input_key: &LweSecretKey32, output_key: &GlweSecretKey32, decomposition_level_count: DecompositionLevelCount, decomposition_base_log: DecompositionBaseLog, noise: StandardDev, f: F, polynomial: &CleartextVector32, ) -> Result<FunctionalPackingKeyswitchKey32, FunctionalPackingKeyswitchKeyCreationError<Self::EngineError>>

Example:

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

// DISCLAIMER: the parameters used here are only for test purpose, and are not secure.
let input_lwe_dimension = LweDimension(10);
let output_glwe_dimension = GlweDimension(3);
let polynomial_size = PolynomialSize(256);
let decomposition_base_log = DecompositionBaseLog(3);
let decomposition_level_count = DecompositionLevelCount(5);
let noise = Variance(2_f64.powf(-25.));

let mut engine = CoreEngine::new(())?;
let input_key: LweSecretKey32 = engine.create_lwe_secret_key(input_lwe_dimension)?;
let output_key: GlweSecretKey32 = engine.create_glwe_secret_key(output_glwe_dimension,
polynomial_size)?;    

let val = vec![1_u32; output_key.polynomial_size().0];
let polynomial: CleartextVector32 = engine.create_cleartext_vector(&val)?;
let functional_packing_keyswitch_key = engine.create_functional_packing_keyswitch_key(
    &input_key,
    &output_key,
    decomposition_level_count,
    decomposition_base_log,
    noise,
    |x|x,
    &polynomial,    
)?;
assert_eq!(
assert_eq!(
assert_eq!(functional_packing_keyswitch_key.input_lwe_dimension(), input_lwe_dimension);
assert_eq!(functional_packing_keyswitch_key.output_glwe_dimension(), output_glwe_dimension);

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

unsafe fn create_functional_packing_keyswitch_key_unchecked<F: Fn(u32) -> u32>( &mut self, input_key: &LweSecretKey32, output_key: &GlweSecretKey32, decomposition_level_count: DecompositionLevelCount, decomposition_base_log: DecompositionBaseLog, noise: StandardDev, f: F, polynomial: &CleartextVector32, ) -> FunctionalPackingKeyswitchKey32

Unsafely creates a functional packing keyswitch key.

impl FunctionalPackingKeyswitchKeyEntity for FunctionalPackingKeyswitchKey32

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 LweCiphertextVectorGlweCiphertextDiscardingFunctionalPackingKeyswitchEngine<FunctionalPackingKeyswitchKey32, LweCiphertextVector32, GlweCiphertext32> for CoreEngine

Description:

Implementation of LweCiphertextVectorGlweCiphertextDiscardingFunctionalPackingKeyswitchEngine for CoreEngine that operates on 32 bits integers.

fn discard_functional_packing_keyswitch_lwe_ciphertext_vector( &mut self, output: &mut GlweCiphertext32, input: &LweCiphertextVector32, ksk: &FunctionalPackingKeyswitchKey32, ) -> Result<(), LweCiphertextVectorGlweCiphertextDiscardingFunctionalPackingKeyswitchError<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 20 bits)
let input_vector = vec![3_u32 << 20, 256];

let mut engine = CoreEngine::new(())?;
let input_key: LweSecretKey32 = engine.create_lwe_secret_key(input_lwe_dimension)?;
let output_key: GlweSecretKey32 =
    engine.create_glwe_secret_key(output_glwe_dimension, polynomial_size)?;
let val = vec![1_u32; output_key.polynomial_size().0];
let polynomial: CleartextVector32 = engine.create_cleartext_vector(&val)?;
let functional_packing_keyswitch_key = engine.create_functional_packing_keyswitch_key(
    &input_key,
    &output_key,
    decomposition_level_count,
    decomposition_base_log,
    noise,
    |x|x,
    &polynomial,
)?;
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_functional_packing_keyswitch_lwe_ciphertext_vector(
    &mut ciphertext_output,
    &ciphertext_vector,
    &functional_packing_keyswitch_key,
)?;
assert_eq!(ciphertext_output.glwe_dimension(), output_glwe_dimension);

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

unsafe fn discard_functional_packing_keyswitch_lwe_ciphertext_vector_unchecked( &mut self, output: &mut GlweCiphertext32, input: &LweCiphertextVector32, ksk: &FunctionalPackingKeyswitchKey32, )

Unsafely functional packing keyswitches an LWE ciphertext vector.

impl PartialEq for FunctionalPackingKeyswitchKey32

fn eq(&self, other: &FunctionalPackingKeyswitchKey32) -> 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 StructuralPartialEq for FunctionalPackingKeyswitchKey32