Class KeySwitchHYBRID

Defined in File keyswitch-hybrid.h

Page Contents

Inheritance Relationships
- Base Type
Class Documentation

Inheritance Relationships

Base Type

public lbcrypto::KeySwitchRNS (Class KeySwitchRNS)

Class Documentation

class lbcrypto::KeySwitchHYBRID : public lbcrypto::KeySwitchRNS 

Inheritence diagram for lbcrypto::KeySwitchHYBRID:

digraph {
graph [bgcolor="#00000000"]
node [shape=rectangle style=filled fillcolor="#FFFFFF" font=Helvetica padding=2]
edge [color="#1414CE"]
"1" [label="lbcrypto::KeySwitchHYBRID" tooltip="lbcrypto::KeySwitchHYBRID" fillcolor="#BFBFBF"]
"2" [label="lbcrypto::KeySwitchRNS" tooltip="lbcrypto::KeySwitchRNS"]
"3" [label="lbcrypto::KeySwitchBase< DCRTPoly >" tooltip="lbcrypto::KeySwitchBase< DCRTPoly >"]
"1" -> "2" [dir=forward tooltip="public-inheritance"]
"2" -> "3" [dir=forward tooltip="public-inheritance"]
}

Collaboration diagram for lbcrypto::KeySwitchHYBRID:

Hybrid Keyswitching as described in [ Homomorphic Evaluation of the AES Circuit(GHS Scheme)](https://eprint.iacr.org/2012/099.pdf) Uses a mix of BV and GHS keyswitching for efficient key-switching.

Public Functions

KeySwitchHYBRID() = default

virtual ~KeySwitchHYBRID() = default

virtual EvalKey<DCRTPoly> KeySwitchGenInternal(const PrivateKey<DCRTPoly> oldPrivateKey, const PrivateKey<DCRTPoly> newPrivateKey) const override

Method for KeySwitchGen

Parameters

&originalPrivateKey – Original private key used for encryption.
&newPrivateKey – New private key to generate the keyswitch hint.
*KeySwitchHint – is where the resulting keySwitchHint will be placed.

virtual EvalKey<DCRTPoly> KeySwitchGenInternal(const PrivateKey<DCRTPoly> oldPrivateKey, const PrivateKey<DCRTPoly> newPrivateKey, const EvalKey<DCRTPoly> evalKey) const override

virtual EvalKey<DCRTPoly> KeySwitchGenInternal(const PrivateKey<DCRTPoly> oldPrivateKey, const PublicKey<DCRTPoly> newPublicKey) const override

virtual void KeySwitchInPlace(Ciphertext<DCRTPoly> &ciphertext, const EvalKey<DCRTPoly> evalKey) const override

virtual Ciphertext<DCRTPoly> KeySwitchExt(ConstCiphertext<DCRTPoly> ciphertext, bool addFirst) const override

virtual Ciphertext<DCRTPoly> KeySwitchDown(ConstCiphertext<DCRTPoly> ciphertext) const override

virtual DCRTPoly KeySwitchDownFirstElement(ConstCiphertext<DCRTPoly> ciphertext) const override

virtual std::shared_ptr<std::vector<DCRTPoly>> KeySwitchCore(const DCRTPoly &a, const EvalKey<DCRTPoly> evalKey) const override

virtual std::shared_ptr<std::vector<DCRTPoly>> EvalKeySwitchPrecomputeCore(const DCRTPoly &c, std::shared_ptr<CryptoParametersBase<DCRTPoly>> cryptoParamsBase) const override

std::shared_ptr<std::vector<DCRTPoly>> EvalFastKeySwitchCore(const std::shared_ptr<std::vector<DCRTPoly>> digits, const EvalKey<DCRTPoly> evalKey, const std::shared_ptr<ParmType> paramsQl) const override

std::shared_ptr<std::vector<DCRTPoly>> EvalFastKeySwitchCoreExt(const std::shared_ptr<std::vector<DCRTPoly>> digits, const EvalKey<DCRTPoly> evalKey, const std::shared_ptr<ParmType> paramsQl) const override

template<class Archive> inline void save(Archive &ar) const

template<class Archive> inline void load(Archive &ar)

inline virtual std::string SerializedObjectName() const override