OpenFheCkksContext#

class OpenFheCkksContext#

An implementation of HeContext using the OpenFhe CKKS backend.

init(self: pyhelayers.OpenFheCkksContext, req: pyhelayers.HeConfigRequirement) → None#

Initializes this OpenFheCkksContext according the given requirement.

Parameters:: req – an HeConfigRequirement object, indicating the required configuration parameters (e.g. securityLevel, numSlots).
Raises:: RuntimeError – if it is not possible to fulfill the given requirement.

class OpenFheCkksContext : public helayers::OpenFheContext #

Implementation of OpenFheContext for the CKKS scheme.

Public Functions

OpenFheCkksContext()#

virtual void init(const HeConfigRequirement &req) override#: Internal use.

virtual std::shared_ptr<MultiPartyUtils> getMultiPartyUtils() override#: Do not use. Should be made private.

virtual std::shared_ptr<MultiPartyUtils> getMultiPartyUtils() const override#

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

virtual int getBestFeasibleFractionalPartPrecision(const HeConfigRequirement &req) const override#

Returns the best feasible fractional part precision under the given configuration requirement.

If there is no such a fractional part precision, returns -1. All the fields of the given requirement other than req.fractionalPartPrecision are expected to be present, while any value in req.fractionalPartPrecision will be ignored.

Parameters:: req – The requirement to get best fractional part precision for.

virtual int getBestFeasibleMulDepth(const HeConfigRequirement &req) const override#

Returns the best feasible multiplication depth under the given configuration requirement.

If there is no such a multiplication depth, returns -1. All the fields of the given requirement other than req.multiplicationDepth are expected to be present, while any value in req.multiplicationDepth will be ignored.

Parameters:: req – The requirement to get best multiplication depth for.

virtual bool publicFunctionsSupported(const PublicFunctions &publicFunctions) const override#

Returns whether the given PublicFunctions object is supported by this HeContext.

The given PublicFunctions object is assumed to be valid (see also PublicFunctions::validate()).

Parameters:: publicFunctions – The PublicFunctions object.

inline virtual std::string getSchemeName() const override#: Returns the name of the underlying scheme.

virtual std::shared_ptr<HeContext> clone() const override#

Returns an uninitialized context of the same type.

Used for dynamic type loading among others.

virtual BootstrapConfig getBootstrapChainIndexes(const HeConfigRequirement &req) const override#

Returns a bootstrap config object with two chain index values: the minimum level in which ciphertexts can be bootstrapped and the level of ciphertexts after bootstrapping.

Parameters:: req – The requirement, must indicate a bootstrappable object.

virtual int getMinChainIndexForBootstrapping() const override#: Assuming this HeContext is bootstrappable, returns the minimum level in which ciphertexts can be bootstrapped.