Struct concrete::lwe_bsk::LWEBSK

pub struct LWEBSK {
    pub ciphertexts: FourierBootstrapKey<AlignedVec<Complex64>, u64>,
    pub variance: f64,
    pub dimension: usize,
    pub polynomial_size: usize,
    pub base_log: usize,
    pub level: usize,
}

Fields

ciphertexts: FourierBootstrapKey<AlignedVec<Complex64>, u64>

variance: f64

dimension: usize

polynomial_size: usize

base_log: usize

level: usize

Implementations

impl LWEBSK

pub fn get_lwe_dimension(&self) -> usize

Return the dimension of an LWE we can bootstrap with this key

pub fn get_polynomial_size_log(&self) -> usize

Return the log2 of the polynomial size of the RLWE involved in the bootstrap

pub fn generate_functional_look_up_table<F: Fn(f64) -> f64>(
    &self,
    encoder_input: &Encoder,
    encoder_output: &Encoder,
    f: F
) -> Result<Vec<Torus>, CryptoAPIError>

Build a lookup table af a function from two encoders

Argument

• encoder_input - the encoder of the input (of the bootstrap)
• encoder_output - the encoder of the output (of the bootstrap)
• f - a function

Output

• a slice of Torus containing the lookup table

pub fn generate_identity_look_up_table(
    &self,
    encoder_input: &Encoder,
    encoder_output: &Encoder
) -> Result<Vec<Torus>, CryptoAPIError>

Build a lookup table for the identity function from two encoders

Argument

• encoder_input - the encoder of the input (of the bootstrap)
• encoder_output - the encoder of the output (of the bootstrap)

Output

• a slice of Torus containing the lookup table

pub fn new(
    sk_input: &LWESecretKey,
    sk_output: &RLWESecretKey,
    base_log: usize,
    level: usize
) -> LWEBSK

Create a valid bootstrapping key

Argument

• sk_before - an LWE secret key (input for the bootstrap)
• sk_after - an LWE secret key (output for the bootstrap)
• base_log - the log2 of the decomposition base
• level - the number of levels of the decomposition

Output

• an LWEBSK

pub fn zero(
    sk_input: &LWESecretKey,
    sk_output: &RLWESecretKey,
    base_log: usize,
    level: usize
) -> LWEBSK

Create an empty bootstrapping key

Argument

• sk_before - an LWE secret key (input for the bootstrap)
• sk_after - an LWE secret key (output for the bootstrap)
• base_log - the log2 of the decomposition base
• level - the number of levels of the decomposition

Output

• an LWEBSK

pub fn save(&self, path: &str)

pub fn load(path: &str) -> LWEBSK

Trait Implementations

impl Clone for LWEBSK

fn clone(&self) -> LWEBSK

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LWEBSK

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LWEBSK

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Display for LWEBSK

Print needed pieces of information about an LWEBSK

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

Formats the value using the given formatter.

impl PartialEq<LWEBSK> for LWEBSK

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

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

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

This method tests for !=.

impl Serialize for LWEBSK

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LWEBSK