An implementation of HeContext for BGV scheme in HElib. More...

#include <HelibBgvContext.h>

Inheritance diagram for helayers::HelibBgvContext:

Public Member Functions
void	init (unsigned long p, unsigned long m, unsigned long r, unsigned long L)

void	init (const HelibConfig &conf) override
	Initializes context with given configuration. More...

void	init (const HelibConfig &conf, helib::Context userContext, helib::SecKey userSecretKey, helib::PubKey *userPublicKey)
	Initializes context with given context and keys. More...

virtual std::shared_ptr< AbstractCiphertext >	createAbstractCipher ()
	Returns a pointer to HelibBgvCiphertext, initialized with this HelibBgvContext.

virtual std::shared_ptr< AbstractPlaintext >	createAbstractPlain ()
	Returns a pointer to HelibBgvPlaintext, initialized with this HelibBgvContext.

std::shared_ptr< AbstractFunctionEvaluator >	getFunctionEvaluator () override
	Returns a pointer to HelibBgvNativeFunctionEvaluator, initialized with this HelibBgvContext.

std::shared_ptr< AbstractEncoder >	getEncoder () override
	Returns a pointer to HelibBgvEncoder, initialized with this HelibBgvContext.

void	printSignature (std::ostream &out=std::cout) const override
	Prints a summary of library details and configuration params. More...

virtual const helib::EncryptedArray &	getEncryptedArray ()
	Returns the EncryptedArray used to perform operation on ciphertexts and plaintexts that are initialized with this scheme.

void	load (std::istream &in)
	Loads this HelibBgvcontext from the given istream. More...

std::string	getSchemeName () const override
	Returns the name of this scheme (i.e. "BGV").

Public Member Functions inherited from helayers::HelibContext
void	init (const HeConfigRequirement &req) override
	Internal use.

void	initPreset (HelibPreset preset)
	Initalizes with a given preset. More...

int	getTopChainIndex () const override
	Returns the highest available chain index (for schemes where it is applicable).

int	slotCount () const override
	The number of slots in each CTile (ciphertext) or PTile (plaintext) created over this context.

int	getSecurityLevel () const override
	Returns the security level supplied by this context.

bool	hasSecretKey () const override
	Returns whether this context contains a secret key. More...

const helib::PubKey &	getPublicKey () const

const helib::SecKey &	getSecretKey () const

const helib::Context &	getContext () const

bool	getMirrored () const

void	setMirrored (bool v)

void	printSignature (std::ostream &out=std::cout) const override
	Prints a summary of library details and configuration params. More...

void	debugPrint (const std::string &title="", int verbose=0, std::ostream &out=std::cout) const override
	Prints detailed information for debug purposes. More...

void	save (std::ostream &out, bool withSecretKey) override
	Saves this context to a stream in binary form. More...

void	load (std::istream &in) override
	Loads context saved by the save() method. More...

void	saveSecretKey (std::ostream &out) override
	Save secret key to the given ostream. More...

void	loadSecretKey (std::istream &in) override
	Load secret key from the given istream. More...

std::string	getLibraryName () const override
	Returns the name of the underlying library.

bool	isConfigRequirementFeasible (const HeConfigRequirement &req) const override
	Internal use.

Public Member Functions inherited from helayers::HeContext
	HeContext ()
	Constructs an empty object.

	HeContext (const HeContext &src)=delete
	Copy constructor. More...

HeContext &	operator= (const HeContext &src)=delete
	Copy from another object. More...

virtual std::shared_ptr< AbstractBitwiseEvaluator >	getBitwiseEvaluator ()
	Do not use. Should be made private.

const HeTraits &	getTraits ()
	Returns an HeTraits object containing various properties of the underlying scheme.

virtual std::shared_ptr< std::vector< uint64_t > >	getModulusChain () const
	Returns the modulus chain bit length for each prime in the chain (where applicable).

void	saveToFile (const std::string &fileName, bool withSecretKey)
	Saves this context to a file in binary form. More...

void	loadFromFile (const std::string &fileName)
	Loads context saved by the saveToFile() method. More...

void	saveSecretKeyToFile (const std::string &fileName)
	save secret key to the given file. More...

void	loadSecretKeyFromFile (const std::string &fileName)
	load secret key from the given file. More...

virtual double	getDefaultScale () const
	Returns default scale used in encoding (where applicable).

virtual void	setDefaultScale (double v)
	Sets the default scale to be used in encoding (where applicable). More...

virtual std::string	getSignature () const
	Returns a signature of the context that distinguishes it enough to be able to load previously stored contexts based on their signatures.

virtual std::shared_ptr< JsonWrapper >	getEstimatedLatencies () const
	For internal use.

virtual std::shared_ptr< HeContext >	clone () const
	Returns an uninitialized context of the same type. More...

Additional Inherited Members
Static Public Member Functions inherited from helayers::HelibContext
static std::shared_ptr< HelibContext >	create (HelibPreset preset)
	Creates a new HelibContext for either CKKS or BGV, based on a preset configuration. More...

Static Public Member Functions inherited from helayers::HeContext
static std::shared_ptr< HeContext >	loadHeContextFromFile (const std::string &fileName)
	Returns a pointer to a context initialized from file. More...

static std::shared_ptr< HeContext >	loadHeContext (std::istream &in)
	Returns a pointer to a context initialized from stream. More...

static bool	internalRegisterContext (const HeContext *context)
	Registers a context object for the purpose of dynamic loading. More...

Protected Attributes inherited from helayers::HelibContext
HelibConfig	config

helib::Context *	context = NULL

helib::SecKey *	secretKey = NULL

helib::PubKey *	publicKey = NULL

long	nslots = 0

bool	mirrored = false

Protected Attributes inherited from helayers::HeContext
HeTraits	traits

Detailed Description

An implementation of HeContext for BGV scheme in HElib.

It can be either initialized via parameters, via an HelibConfig, or loaded from a file.

It is recommended not to use directly after initialization, but use an HeContext reference instead.

It is currently in beta version, as not all BGV operators are covered.

Member Function Documentation

◆ init() [1/2]

void helayers::HelibBgvContext::init ( const HelibConfig & conf )

overridevirtual

Initializes context with given configuration.

Parameters

[in] conf user configuration

Reimplemented from helayers::HelibContext.

◆ init() [2/2]

void helayers::HelibBgvContext::init	(	const HelibConfig &	conf,
		helib::Context *	userContext,
		helib::SecKey *	userSecretKey,
		helib::PubKey *	userPublicKey
	)

Initializes context with given context and keys.

Parameters

[in]	conf	user configuration
[in]	userContext	user context
[in]	userSecretKey	user secret key
[in]	userPublicKey	user public key

◆ load()

void helayers::HelibBgvContext::load ( std::istream & in )

virtual

Loads this HelibBgvcontext from the given istream.

Parameters

[in] istream The istream to load from.

Reimplemented from helayers::HeContext.

◆ printSignature()

void helayers::HelibBgvContext::printSignature ( std::ostream & out = std::cout ) const

overridevirtual

Prints a summary of library details and configuration params.

Parameters

[in] out output stream to write to

Implements helayers::HeContext.

The documentation for this class was generated from the following files:

/opt/IBM/FHE-distro/ML-HElib/src/helayers/hebase/helib/HelibBgvContext.h
/opt/IBM/FHE-distro/ML-HElib/src/helayers/hebase/helib/HelibBgvContext.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ init() [1/2]

◆ init() [2/2]

◆ load()

◆ printSignature()