One entry in a ciphertext std::vector. More...

#include <Ctxt.h>

Inheritance diagram for helib::CtxtPart:

Public Member Functions
bool	operator== (const CtxtPart &other) const

bool	operator!= (const CtxtPart &other) const

	CtxtPart (const Context &_context, const IndexSet &s)

	CtxtPart (const Context &_context, const IndexSet &s, const SKHandle &otherHandle)

	CtxtPart (const DoubleCRT &other)

	CtxtPart (const DoubleCRT &other, const SKHandle &otherHandle)

void	writeTo (std::ostream &str) const
	Write out the `CtxtPart` object in binary format. More...

void	read (std::istream &str)
	In-place read from the stream the serialized `CtxtPart` object in binary format. More...

void	writeToJSON (std::ostream &str) const
	Write out the ciphertext part (`CtxtPart`) object to the output stream using JSON format. More...

JsonWrapper	writeToJSON () const
	Write out the ciphertext part (`CtxtPart`) object to a `JsonWrapper`. More...

void	readJSON (std::istream &str)
	Read from the stream the serialized ciphertext part (`CtxtPart`) object using JSON format. More...

void	readJSON (const JsonWrapper &j)
	Read from the `JsonWrapper` the serialized ciphertext part (`CtxtPart`) object. More...

Public Member Functions inherited from helib::DoubleCRT
	DoubleCRT (const DoubleCRT &other)=default

	DoubleCRT (const NTL::ZZX &poly, const Context &_context, const IndexSet &indexSet)
	Initializing DoubleCRT from a ZZX polynomial. More...

	DoubleCRT (const zzX &poly, const Context &_context, const IndexSet &indexSet)
	Same as above, but with zzX's. More...

	DoubleCRT (const Context &_context, const IndexSet &indexSet)
	Also specify the IndexSet explicitly. More...

DoubleCRT &	operator= (const DoubleCRT &other)

DoubleCRT &	operator= (const zzX &poly)

DoubleCRT &	operator= (const NTL::ZZX &poly)

DoubleCRT &	operator= (const NTL::ZZ &num)

DoubleCRT &	operator= (const long num)

	DoubleCRT (const NTL::ZZ &num, const Context &context, const IndexSet &indexSet)

	DoubleCRT (long num, const Context &context, const IndexSet &indexSet)

long	getOneRow (NTL::Vec< long > &row, long idx, bool positive=false) const
	Get one row of a polynomial. More...

long	getOneRow (NTL::zz_pX &row, long idx) const

void	toPoly (NTL::ZZX &p, const IndexSet &s, bool positive=false) const
	Recovering the polynomial in coefficient representation. This yields an integer polynomial with coefficients in [-P/2,P/2], unless the positive flag is set to true, in which case we get coefficients in [0,P-1] (P is the product of all moduli used). Using the optional IndexSet param we compute the polynomial reduced modulo the product of only the primes in that set. More...

void	toPoly (NTL::ZZX &p, bool positive=false) const

bool	operator== (const DoubleCRT &other) const

bool	operator!= (const DoubleCRT &other) const

DoubleCRT &	SetZero ()

DoubleCRT &	SetOne ()

NTL::xdouble	breakIntoDigits (std::vector< DoubleCRT > &dgts) const
	Break into n digits,according to the primeSets in context.digits. See Section 3.1.6 of the design document (re-linearization) Returns the sum of the canonical embedding of the digits. More...

void	addPrimes (const IndexSet &s1, NTL::ZZX *poly_p=0)
	Expand the index set by s1. It is assumed that s1 is disjoint from the current index set. If poly_p != 0, then *poly_p will first be set to the result of applying toPoly. More...

double	addPrimesAndScale (const IndexSet &s1)
	Expand index set by s1, and multiply by Prod_{q in s1}. s1 is disjoint from the current index set, returns log(product). More...

void	removePrimes (const IndexSet &s1)
	Remove s1 from the index set. More...

void	setPrimes (const IndexSet &s1)
	@ brief make prime set equal to s1 More...

const Context &	getContext () const

const IndexMap< NTL::vec_long > &	getMap () const

const IndexSet &	getIndexSet () const

void	randomize (const NTL::ZZ *seed=nullptr)
	Fills each row i with random ints mod pi, uses NTL's PRG. More...

double	sampleSmall ()
	Coefficients are -1/0/1, Prob[0]=1/2. More...

double	sampleSmallBounded ()

double	sampleHWt (long Hwt)
	Coefficients are -1/0/1 with pre-specified number of nonzeros. More...

double	sampleHWtBounded (long Hwt)

double	sampleGaussian (double stdev=0.0)
	Coefficients are Gaussians Return a high probability bound on L-infty norm of canonical embedding. More...

double	sampleGaussianBounded (double stdev=0.0)

NTL::xdouble	sampleGaussianBounded (NTL::xdouble stdev)

double	sampleUniform (long B)
	Coefficients are uniform in [-B..B]. More...

NTL::xdouble	sampleUniform (const NTL::ZZ &B)

void	scaleDownToSet (const IndexSet &s, long ptxtSpace, NTL::ZZX &delta)

void	FFT (const NTL::ZZX &poly, const IndexSet &s)

void	FFT (const zzX &poly, const IndexSet &s)

void	reduce () const

void	writeTo (std::ostream &str) const
	Write out the `DoubleCRT` object in binary format. More...

void	read (std::istream &str)
	In-place read from the stream the serialized `DoubleCRT` object in binary format. More...

void	writeToJSON (std::ostream &str) const
	Write out the ciphertext (`Ctxt`) object to the output stream using JSON format. More...

JsonWrapper	writeToJSON () const
	Write out the ciphertext (`Ctxt`) object to a `JsonWrapper`. More...

void	readJSON (std::istream &str)
	In-place read from the `str` `std::istream` the serialized ciphertext (`Ctxt`) object. More...

void	readJSON (const JsonWrapper &j)
	In-place read from the `JsonWrapper` the serialized ciphertext (`Ctxt`) object. More...

DoubleCRT &	Negate (const DoubleCRT &other)

DoubleCRT &	Negate ()

DoubleCRT &	operator+= (const DoubleCRT &other)

DoubleCRT &	operator+= (const NTL::ZZX &poly)

DoubleCRT &	operator+= (const NTL::ZZ &num)

DoubleCRT &	operator+= (long num)

DoubleCRT &	operator-= (const DoubleCRT &other)

DoubleCRT &	operator-= (const NTL::ZZX &poly)

DoubleCRT &	operator-= (const NTL::ZZ &num)

DoubleCRT &	operator-= (long num)

DoubleCRT &	operator++ ()

DoubleCRT &	operator-- ()

void	operator++ (int)

void	operator-- (int)

DoubleCRT &	operator*= (const DoubleCRT &other)

DoubleCRT &	operator*= (const NTL::ZZX &poly)

DoubleCRT &	operator*= (const NTL::ZZ &num)

DoubleCRT &	operator*= (long num)

void	Add (const DoubleCRT &other, bool matchIndexSets=true)

void	Sub (const DoubleCRT &other, bool matchIndexSets=true)

void	Mul (const DoubleCRT &other, bool matchIndexSets=true)

DoubleCRT &	operator/= (const NTL::ZZ &num)

DoubleCRT &	operator/= (long num)

void	Exp (long k)
	Small-exponent polynomial exponentiation. More...

void	automorph (long k)
	Apply the automorphism F(X) --> F(X^k) (with gcd(k,m)=1) More...

DoubleCRT &	operator>>= (long k)

void	complexConj ()
	Compute the complex conjugate, the same as automorph(m-1) More...

Static Public Member Functions
static CtxtPart	readFrom (std::istream &str, const Context &context)
	Read from the stream the serialized `CtxtPart` object in binary format. More...

static CtxtPart	readFromJSON (std::istream &str, const Context &context)
	Read from the stream the serialized ciphertext part (`CtxtPart`) object using JSON format. More...

static CtxtPart	readFromJSON (const JsonWrapper &j, const Context &context)
	Read from the `JsonWrapper` the serialized ciphertext part (`CtxtPart`) object. More...

Static Public Member Functions inherited from helib::DoubleCRT
static DoubleCRT	readFrom (std::istream &str, const Context &context)
	Read from the stream the serialized `DoubleCRT` object in binary format. More...

static DoubleCRT	readFromJSON (std::istream &str, const Context &context)
	Read from the stream the serialized ciphertext (`Ctxt`) object using JSON format. More...

static DoubleCRT	readFromJSON (const JsonWrapper &j, const Context &context)
	Read from the `JsonWrapper` the serialized ciphertext (`Ctxt`) object. More...

Public Attributes
SKHandle	skHandle
	The handle is a public data member. More...

Detailed Description

One entry in a ciphertext std::vector.

A ciphertext part consists of a polynomial (element of the ring R_Q) and a handle to the corresponding secret-key polynomial.

Constructor & Destructor Documentation

◆ CtxtPart() [1/4]

helib::CtxtPart::CtxtPart	(	const Context &	_context,
		const IndexSet &	s
	)

inline

◆ CtxtPart() [2/4]

helib::CtxtPart::CtxtPart	(	const Context &	_context,
		const IndexSet &	s,
		const SKHandle &	otherHandle
	)

inline

◆ CtxtPart() [3/4]

helib::CtxtPart::CtxtPart ( const DoubleCRT & other )

inlineexplicit

◆ CtxtPart() [4/4]

helib::CtxtPart::CtxtPart	(	const DoubleCRT &	other,
		const SKHandle &	otherHandle
	)

inline

Member Function Documentation

◆ operator!=()

bool helib::CtxtPart::operator!= ( const CtxtPart & other ) const

inline

◆ operator==()

bool helib::CtxtPart::operator== ( const CtxtPart & other ) const

◆ read()

void helib::CtxtPart::read ( std::istream & str )

In-place read from the stream the serialized CtxtPart object in binary format.

Parameters

str	Input `std::istream`.

◆ readFrom()

CtxtPart helib::CtxtPart::readFrom	(	std::istream &	str,
		const Context &	context
	)

static

Read from the stream the serialized CtxtPart object in binary format.

Parameters

str	Input `std::istream`.

Returns: The deserialized CtxtPart object.

◆ readFromJSON() [1/2]

CtxtPart helib::CtxtPart::readFromJSON	(	const JsonWrapper &	j,
		const Context &	context
	)

static

Read from the JsonWrapper the serialized ciphertext part (CtxtPart) object.

Parameters

j	The `JsonWrapper` containing the serialized `CtxtPart` object.
context	The `Context` to be used.

Returns: The deserialized CtxtPart object.

◆ readFromJSON() [2/2]

CtxtPart helib::CtxtPart::readFromJSON	(	std::istream &	str,
		const Context &	context
	)

static

Read from the stream the serialized ciphertext part (CtxtPart) object using JSON format.

Parameters

str	Input `std::istream`.
context	The `Context` to be used.

Returns: The deserialized CtxtPart object.

◆ readJSON() [1/2]

void helib::CtxtPart::readJSON ( const JsonWrapper & j )

Read from the JsonWrapper the serialized ciphertext part (CtxtPart) object.

Parameters

j	The `JsonWrapper` containing the serialized `SKHandle` object.

◆ readJSON() [2/2]

void helib::CtxtPart::readJSON ( std::istream & str )

Read from the stream the serialized ciphertext part (CtxtPart) object using JSON format.

Parameters

str	Input `std::istream`.

◆ writeTo()

void helib::CtxtPart::writeTo ( std::ostream & str ) const

Write out the CtxtPart object in binary format.

Parameters

str	Output `std::ostream`.

◆ writeToJSON() [1/2]

JsonWrapper helib::CtxtPart::writeToJSON ( ) const

Write out the ciphertext part (CtxtPart) object to a JsonWrapper.

Returns: The JsonWrapper.

◆ writeToJSON() [2/2]

void helib::CtxtPart::writeToJSON ( std::ostream & str ) const

Write out the ciphertext part (CtxtPart) object to the output stream using JSON format.

Parameters

str	Output `std::ostream`.

Member Data Documentation

◆ skHandle

SKHandle helib::CtxtPart::skHandle

The handle is a public data member.

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ CtxtPart() [1/4]

◆ CtxtPart() [2/4]

◆ CtxtPart() [3/4]

◆ CtxtPart() [4/4]

Member Function Documentation

◆ operator!=()

◆ operator==()

◆ read()

◆ readFrom()

◆ readFromJSON() [1/2]

◆ readFromJSON() [2/2]

◆ readJSON() [1/2]

◆ readJSON() [2/2]

◆ writeTo()

◆ writeToJSON() [1/2]

◆ writeToJSON() [2/2]

Member Data Documentation

◆ skHandle