Trait concrete_core::specification::engines::LweCiphertextTrivialEncryptionEngine

pub trait LweCiphertextTrivialEncryptionEngine<Plaintext, Ciphertext>: AbstractEnginewhere
    Plaintext: PlaintextEntity,
    Ciphertext: LweCiphertextEntity,{
    fn trivially_encrypt_lwe_ciphertext(
        &mut self,
        lwe_size: LweSize,
        input: &Plaintext
    ) -> Result<Ciphertext, LweCiphertextTrivialEncryptionError<Self::EngineError>>;
    unsafe fn trivially_encrypt_lwe_ciphertext_unchecked(
        &mut self,
        lwe_size: LweSize,
        input: &Plaintext
    ) -> Ciphertext;
}

A trait for engines trivially encrypting LWE ciphertext.

Semantics

This pure operation generates anLWE ciphertext containing the trivial encryption of the input plaintext with the requested lwe_size.

Formal Definition

A trivial encryption uses a zero mask and no noise. It is absolutely not secure, as the body contains a direct copy of the plaintext. However, it is useful for some FHE algorithms taking public information as input. For example, a trivial GLWE encryption of a public lookup table is used in the bootstrap.

Required Methods

fn trivially_encrypt_lwe_ciphertext(
    &mut self,
    lwe_size: LweSize,
    input: &Plaintext
) -> Result<Ciphertext, LweCiphertextTrivialEncryptionError<Self::EngineError>>

Trivially encrypts an LWE ciphertext.

unsafe fn trivially_encrypt_lwe_ciphertext_unchecked(
    &mut self,
    lwe_size: LweSize,
    input: &Plaintext
) -> Ciphertext

Unsafely creates the trivial LWE encryption of the plaintext.

Safety

For the general safety concerns regarding this operation, refer to the different variants of `LweCiphertextTrivialEncryptionError . For safety concerns specific to an engine, refer to the implementer safety section.

Implementors

impl LweCiphertextTrivialEncryptionEngine<Plaintext32, LweCiphertext32> for DefaultEngine

impl LweCiphertextTrivialEncryptionEngine<Plaintext64, LweCiphertext64> for DefaultEngine