helib::EncryptedArrayCx Class Reference

A different derived class to be used for the approximate-numbers scheme. More...

#include <EncryptedArray.h>

Inheritance diagram for helib::EncryptedArrayCx:

Public Member Functions
double	encodei (zzX &ptxt, long precision=-1) const
	EncryptedArrayCx (const Context &_context)
	EncryptedArrayCx (const Context &_context, const PAlgebraModCx &_alMod)
EncryptedArrayBase *	clone () const override
const zzX &	getiEncoded () const
PA_tag	getTag () const override
const Context &	getContext () const override
const PAlgebra &	getPAlgebra () const override
long	getDegree () const override
void	rotate (Ctxt &ctxt, long k) const override
	Right rotation as a linear array. E.g., rotating ctxt=Enc(1 2 3 ... n) by k=1 gives Enc(n 1 2 ... n-1) More...
void	shift (Ctxt &ctxt, long k) const override
	Non-cyclic right shift with zero fill E.g., shifting ctxt=Enc(1 2 3 ... n) by k=1 gives Enc(0 1 2... n-1) More...
void	rotate1D (Ctxt &ctxt, long i, long k, bool dc=false) const override
	right-rotate k positions along the i'th dimension More...
void	shift1D (Ctxt &ctxt, long i, long k) const override
	Right shift k positions along the i'th dimension with zero fill. More...
long	getP2R () const override
void	encode (UNUSED zzX &ptxt, UNUSED const std::vector< long > &array) const override
	Unimplemented encode function for BGV. It will always throw helib::LogicError. More...
void	encode (UNUSED NTL::ZZX &ptxt, UNUSED const std::vector< long > &array) const override
	Unimplemented encode function for BGV. It will always throw helib::LogicError. More...
void	encode (UNUSED zzX &ptxt, UNUSED const std::vector< zzX > &array) const override
	Unimplemented encode function for BGV. It will always throw helib::LogicError. More...
void	encode (UNUSED zzX &ptxt, UNUSED const PlaintextArray &array) const override
	Unimplemented encode function for BGV. It will always throw helib::LogicError. More...
void	encode (UNUSED NTL::ZZX &ptxt, UNUSED const std::vector< NTL::ZZX > &array) const override
	Unimplemented encode function for BGV. It will always throw helib::LogicError. More...
void	encode (UNUSED NTL::ZZX &ptxt, UNUSED const PlaintextArray &array) const override
	Unimplemented encode function for BGV. It will always throw helib::LogicError. More...
void	decode (UNUSED std::vector< long > &array, UNUSED const NTL::ZZX &ptxt) const override
	Unimplemented decode function for BGV. It will always throw helib::LogicError. More...
void	decode (UNUSED std::vector< NTL::ZZX > &array, UNUSED const NTL::ZZX &ptxt) const override
	Unimplemented decode function for BGV. It will always throw helib::LogicError. More...
void	decode (UNUSED PlaintextArray &array, UNUSED const NTL::ZZX &ptxt) const override
	Unimplemented decode function for BGV. It will always throw helib::LogicError. More...
void	random (UNUSED std::vector< NTL::ZZX > &array) const override
	Unimplemented random function for BGV. It will always throw helib::LogicError. More...
void	decrypt (UNUSED const Ctxt &ctxt, UNUSED const SecKey &sKey, UNUSED std::vector< long > &ptxt) const override
	Unimplemented decrypt function for BGV. It will always throw helib::LogicError. More...
void	decrypt (UNUSED const Ctxt &ctxt, UNUSED const SecKey &sKey, UNUSED std::vector< NTL::ZZX > &ptxt) const override
	Unimplemented decrypt function for BGV. It will always throw helib::LogicError. More...
void	decrypt (UNUSED const Ctxt &ctxt, UNUSED const SecKey &sKey, UNUSED PlaintextArray &ptxt) const override
	Unimplemented decrypt function for BGV. It will always throw helib::LogicError. More...
void	buildLinPolyCoeffs (UNUSED std::vector< NTL::ZZX > &C, UNUSED const std::vector< NTL::ZZX > &L) const override
	Unimplemented buildLinPolyCoeffs function for BGV. It will always throw helib::LogicError. More...
double	encode (zzX &ptxt, const std::vector< cx_double > &array, double useThisSize, long precision=-1) const
double	encode (zzX &ptxt, const std::vector< double > &array, double useThisSize, long precision=-1) const
double	encode (zzX &ptxt, const std::vector< long > &array, double useThisSize, long precision=-1) const
template<typename Scheme >
double	encode (zzX &out, const Ptxt< Scheme > &ptxt, double useThisSize, long precision=-1) const
	Encode a Ptxt object into a zzX. More...
double	encode (zzX &ptxt, double aSingleNumber, double useThisSize=-1, long precision=-1) const
template<typename PTXT >
double	encode (NTL::ZZX &ptxt, const PTXT &pt, double useThisSize=-1, long precision=-1) const
void	encryptOneNum (Ctxt &ctxt, const PubKey &key, double num, double useThisSize=-1, long precision=-1) const
template<typename PTXT >
void	encrypt (Ctxt &ctxt, const PubKey &key, const PTXT &ptxt, double useThisSize, long precision=-1) const
template<typename PTXT >
void	encrypt (Ctxt &ctxt, const PubKey &key, const PTXT &ptxt) const
void	encodeUnitSelector (zzX &ptxt, long i) const override
	Encodes a std::vector with 1 at position i and 0 everywhere else. More...
double	encodeRoundingError () const
long	encodeScalingFactor (long precision=-1, double roundErr=-1.0) const
void	decode (std::vector< cx_double > &array, const zzX &ptxt, double scaling) const
void	decode (std::vector< cx_double > &array, const NTL::ZZX &ptxt, double scaling) const
void	decode (std::vector< double > &array, const zzX &ptxt, double scaling) const
void	decode (std::vector< double > &array, const NTL::ZZX &ptxt, double scaling) const
void	random (std::vector< cx_double > &array, double rad=1.0) const
void	random (std::vector< double > &array, double rad=1.0) const
void	random (std::vector< long > &array) const override
void	decrypt (const Ctxt &ctxt, const SecKey &sKey, std::vector< cx_double > &ptxt) const override
void	decrypt (const Ctxt &ctxt, const SecKey &sKey, std::vector< double > &ptxt) const override
template<typename Scheme >
void	decrypt (const Ctxt &ctxt, const SecKey &sKey, Ptxt< Scheme > &ptxt) const
	Decrypt ciphertext to a plaintext relative to a specific scheme. More...
void	extractRealPart (Ctxt &c) const
template<typename Scheme >
void	extractRealPart (Ptxt< Scheme > &p) const
	Extract the real part of a CKKS plaintext. More...
template<typename Scheme >
void	extractImPart (Ptxt< Scheme > &p) const
	Extract the imaginary part of a CKKS plaintext. More...
void	extractImPart (Ctxt &c, DoubleCRT *dcrt=nullptr) const
Linearized polynomials for EncryptedArrayCx
buildLinPolyCoeffs returns in C two encoded constants such that the linear transformation(s) defined as L(1) = oneImage and L(i)=iImage can be computed as: L(x) = C[0]*x + C[1]*conjugate(x). Once C is computed, we can apply this L to a ciphertext by calling applyLinPolyLL(ctxt, C, 2). Alternatively, we can convert C to a vector of two DoubleCRT objects, then call applyLinPolyLL(ctxt, dcrtVec, 2). This lets us compute the DoubleCRT object just once, then use them many times.
void	buildLinPolyCoeffs (std::vector< zzX > &C, const cx_double &oneImage, const cx_double &iImage, long precision=0) const
	First variant: same linear transformation in all the slots. More...
void	buildLinPolyCoeffs (std::vector< zzX > &C, const std::vector< cx_double > &oneImages, const std::vector< cx_double > &iImages, long precision=0) const
	Second variant: different linear transformation in each slots. More...
Public Member Functions inherited from helib::EncryptedArrayBase
virtual	~EncryptedArrayBase ()
virtual void	buildLinPolyCoeffs (std::vector< NTL::ZZX > &C, const std::vector< NTL::ZZX > &L) const =0
	Linearized polynomials. L describes a linear map M by describing its action on the standard power basis: M(x^j mod G) = (L[j] mod G), for j = 0..d-1. The result is a coefficient std::vector C for the linearized polynomial representing M: a polynomial h in Z/(p^r)[X] of degree < d is sent to. More...
virtual void	restoreContext () const
virtual void	restoreContextForG () const
long	size () const
	Total size (# of slots) of hypercube. More...
long	dimension () const
	Number of dimensions of hypercube. More...
long	sizeOfDimension (long i) const
	Size of given dimension. More...
bool	nativeDimension (long i) const
	Is rotations in given dimension a "native" operation? More...
long	coordinate (long i, long k) const
	returns coordinate of index k along the i'th dimension More...
long	addCoord (long i, long k, long offset) const
	adds offset to index k in the i'th dimension More...
template<typename U >
void	rotate1D (std::vector< U > &out, const std::vector< U > &in, long i, long offset) const
	rotate an array by offset in the i'th dimension (output should not alias input) More...
virtual void	encode (zzX &ptxt, const std::vector< long > &array) const =0
virtual void	encode (NTL::ZZX &ptxt, const std::vector< long > &array) const =0
virtual void	encode (zzX &ptxt, const std::vector< zzX > &array) const =0
virtual void	encode (zzX &ptxt, const PlaintextArray &array) const =0
virtual void	encode (NTL::ZZX &ptxt, const std::vector< NTL::ZZX > &array) const =0
virtual void	encode (NTL::ZZX &ptxt, const PlaintextArray &array) const =0
void	encode (zzX &ptxt, const std::vector< NTL::ZZX > &array) const
virtual void	decode (std::vector< long > &array, const NTL::ZZX &ptxt) const =0
virtual void	decode (std::vector< NTL::ZZX > &array, const NTL::ZZX &ptxt) const =0
virtual void	decode (PlaintextArray &array, const NTL::ZZX &ptxt) const =0
virtual void	random (std::vector< NTL::ZZX > &array) const =0
long	decode1Slot (const NTL::ZZX &ptxt, long i) const
void	decode1Slot (NTL::ZZX &slot, const NTL::ZZX &ptxt, long i) const
template<typename PTXT >
void	encrypt (Ctxt &ctxt, const PubKey &key, const PTXT &ptxt) const
virtual void	decrypt (const Ctxt &ctxt, const SecKey &sKey, std::vector< long > &ptxt) const =0
virtual void	decrypt (const Ctxt &ctxt, const SecKey &sKey, std::vector< NTL::ZZX > &ptxt) const =0
virtual void	decrypt (const Ctxt &ctxt, const SecKey &sKey, PlaintextArray &ptxt) const =0
long	decrypt1Slot (const Ctxt &ctxt, const SecKey &sKey, long i) const
void	decrypt1Slot (NTL::ZZX &slot, const Ctxt &ctxt, const SecKey &sKey, long i) const

Static Public Member Functions
static double	roundedSize (double x)
static void	convert (std::vector< cx_double > &out, const std::vector< double > &in)
static void	convert (std::vector< double > &out, const std::vector< cx_double > &in)
static void	convert (std::vector< cx_double > &out, const std::vector< long > &in)
static void	convert (std::vector< long > &out, const std::vector< cx_double > &in)

Detailed Description

A different derived class to be used for the approximate-numbers scheme.

Constructor & Destructor Documentation

EncryptedArrayCx() [1/2]

helib::EncryptedArrayCx::EncryptedArrayCx ( const Context &  _context )

inlineexplicit

EncryptedArrayCx() [2/2]

helib::EncryptedArrayCx::EncryptedArrayCx ( const Context &  _context, const PAlgebraModCx &  _alMod  )

inline

Member Function Documentation

buildLinPolyCoeffs() [1/3]

void helib::EncryptedArrayCx::buildLinPolyCoeffs	(	std::vector< zzX > &	C,
		const cx_double &	oneImage,
		const cx_double &	iImage,
		long	precision = 0
	)		const

First variant: same linear transformation in all the slots.

buildLinPolyCoeffs() [2/3]

void helib::EncryptedArrayCx::buildLinPolyCoeffs	(	std::vector< zzX > &	C,
		const std::vector< cx_double > &	oneImages,
		const std::vector< cx_double > &	iImages,
		long	precision = 0
	)		const

Second variant: different linear transformation in each slots.

buildLinPolyCoeffs() [3/3]

void helib::EncryptedArrayCx::buildLinPolyCoeffs ( UNUSED std::vector< NTL::ZZX > &  C, UNUSED const std::vector< NTL::ZZX > &  L  ) const

inlineoverride

Unimplemented buildLinPolyCoeffs function for BGV. It will always throw helib::LogicError.

Parameters

C	Unused.
L	Unused.

clone()

EncryptedArrayBase* helib::EncryptedArrayCx::clone ( ) const

inlineoverridevirtual

Implements helib::EncryptedArrayBase.

convert() [1/4]

static void helib::EncryptedArrayCx::convert ( std::vector< cx_double > &  out, const std::vector< double > &  in  )

inlinestatic

convert() [2/4]

static void helib::EncryptedArrayCx::convert ( std::vector< cx_double > &  out, const std::vector< long > &  in  )

inlinestatic

convert() [3/4]

static void helib::EncryptedArrayCx::convert ( std::vector< double > &  out, const std::vector< cx_double > &  in  )

inlinestatic

convert() [4/4]

static void helib::EncryptedArrayCx::convert ( std::vector< long > &  out, const std::vector< cx_double > &  in  )

inlinestatic

decode() [1/7]

void helib::EncryptedArrayCx::decode ( std::vector< cx_double > &  array, const NTL::ZZX &  ptxt, double  scaling  ) const

inline

decode() [2/7]

void helib::EncryptedArrayCx::decode	(	std::vector< cx_double > &	array,
		const zzX &	ptxt,
		double	scaling
	)		const

decode() [3/7]

void helib::EncryptedArrayCx::decode ( std::vector< double > &  array, const NTL::ZZX &  ptxt, double  scaling  ) const

inline

decode() [4/7]

void helib::EncryptedArrayCx::decode ( std::vector< double > &  array, const zzX &  ptxt, double  scaling  ) const

inline

decode() [5/7]

void helib::EncryptedArrayCx::decode ( UNUSED PlaintextArray &  array, UNUSED const NTL::ZZX &  ptxt  ) const

inlineoverride

Unimplemented decode function for BGV. It will always throw helib::LogicError.

Parameters

array	Unused.
ptxt	Unused.

decode() [6/7]

void helib::EncryptedArrayCx::decode ( UNUSED std::vector< long > &  array, UNUSED const NTL::ZZX &  ptxt  ) const

inlineoverride

Unimplemented decode function for BGV. It will always throw helib::LogicError.

Parameters

array	Unused.
ptxt	Unused.

decode() [7/7]

void helib::EncryptedArrayCx::decode ( UNUSED std::vector< NTL::ZZX > &  array, UNUSED const NTL::ZZX &  ptxt  ) const

inlineoverride

Unimplemented decode function for BGV. It will always throw helib::LogicError.

Parameters

array	Unused.
ptxt	Unused.

decrypt() [1/6]

template<typename Scheme >

void helib::EncryptedArrayCx::decrypt ( const Ctxt &  ctxt, const SecKey &  sKey, Ptxt< Scheme > &  ptxt  ) const

inline

Decrypt ciphertext to a plaintext relative to a specific scheme.

Template Parameters

Scheme

Encryption scheme to be used (either BGV or CKKS).

Parameters

ctxt	Ciphertext to decrypt.
sKey	Secret key to be used for decryption.
ptxt	Plaintext into which to decrypt. Decrypt a Ctxt ciphertext object to a Ptxt plaintext one relative to a specific scheme.

decrypt() [2/6]

void helib::EncryptedArrayCx::decrypt ( const Ctxt &  ctxt, const SecKey &  sKey, std::vector< cx_double > &  ptxt  ) const

overridevirtual

Implements helib::EncryptedArrayBase.

decrypt() [3/6]

void helib::EncryptedArrayCx::decrypt ( const Ctxt &  ctxt, const SecKey &  sKey, std::vector< double > &  ptxt  ) const

inlineoverridevirtual

Implements helib::EncryptedArrayBase.

decrypt() [4/6]

void helib::EncryptedArrayCx::decrypt ( UNUSED const Ctxt &  ctxt, UNUSED const SecKey &  sKey, UNUSED PlaintextArray &  ptxt  ) const

inlineoverride

Unimplemented decrypt function for BGV. It will always throw helib::LogicError.

Parameters

ctxt	Unused.
sKey	Unused.
ptxt	Unused.

decrypt() [5/6]

void helib::EncryptedArrayCx::decrypt ( UNUSED const Ctxt &  ctxt, UNUSED const SecKey &  sKey, UNUSED std::vector< long > &  ptxt  ) const

inlineoverride

Unimplemented decrypt function for BGV. It will always throw helib::LogicError.

Parameters

ctxt	Unused.
sKey	Unused.
ptxt	Unused.

decrypt() [6/6]

void helib::EncryptedArrayCx::decrypt ( UNUSED const Ctxt &  ctxt, UNUSED const SecKey &  sKey, UNUSED std::vector< NTL::ZZX > &  ptxt  ) const

inlineoverride

Unimplemented decrypt function for BGV. It will always throw helib::LogicError.

Parameters

ctxt	Unused.
sKey	Unused.
ptxt	Unused.

encode() [1/12]

template<typename PTXT >

double helib::EncryptedArrayCx::encode ( NTL::ZZX &  ptxt, const PTXT &  pt, double  useThisSize = -1, long  precision = -1  ) const

inline

encode() [2/12]

void helib::EncryptedArrayCx::encode ( UNUSED NTL::ZZX &  ptxt, UNUSED const PlaintextArray &  array  ) const

inlineoverride

Unimplemented encode function for BGV. It will always throw helib::LogicError.

Parameters

ptxt	Unused.
array	Unused.

encode() [3/12]

void helib::EncryptedArrayCx::encode ( UNUSED NTL::ZZX &  ptxt, UNUSED const std::vector< long > &  array  ) const

inlineoverride

Unimplemented encode function for BGV. It will always throw helib::LogicError.

Parameters

ptxt	Unused.
array	Unused.

encode() [4/12]

void helib::EncryptedArrayCx::encode ( UNUSED NTL::ZZX &  ptxt, UNUSED const std::vector< NTL::ZZX > &  array  ) const

inlineoverride

Unimplemented encode function for BGV. It will always throw helib::LogicError.

Parameters

ptxt	Unused.
array	Unused.

encode() [5/12]

void helib::EncryptedArrayCx::encode ( UNUSED zzX &  ptxt, UNUSED const PlaintextArray &  array  ) const

inlineoverride

Unimplemented encode function for BGV. It will always throw helib::LogicError.

Parameters

ptxt	Unused.
array	Unused.

encode() [6/12]

void helib::EncryptedArrayCx::encode ( UNUSED zzX &  ptxt, UNUSED const std::vector< long > &  array  ) const

inlineoverride

Unimplemented encode function for BGV. It will always throw helib::LogicError.

Parameters

ptxt	Unused.
array	Unused.

encode() [7/12]

void helib::EncryptedArrayCx::encode ( UNUSED zzX &  ptxt, UNUSED const std::vector< zzX > &  array  ) const

inlineoverride

Unimplemented encode function for BGV. It will always throw helib::LogicError.

Parameters

ptxt	Unused.
array	Unused.

encode() [8/12]

template<typename Scheme >

double helib::EncryptedArrayCx::encode ( zzX &  out, const Ptxt< Scheme > &  ptxt, double  useThisSize, long  precision = -1  ) const

inline

Encode a Ptxt object into a zzX.

Template Parameters

Scheme

Encryption scheme to be used (either BGV or CKKS).

Parameters

out	Polynomial to encode into.
ptxt	Plaintext Ptxt object to encode.
useThisSize	Size to use.
precision	Precision to use.

Returns

The scaling factor used in the encoding routine.

encode() [9/12]

double helib::EncryptedArrayCx::encode	(	zzX &	ptxt,
		const std::vector< cx_double > &	array,
		double	useThisSize,
		long	precision = -1
	)		const

encode() [10/12]

double helib::EncryptedArrayCx::encode ( zzX &  ptxt, const std::vector< double > &  array, double  useThisSize, long  precision = -1  ) const

inline

encode() [11/12]

double helib::EncryptedArrayCx::encode ( zzX &  ptxt, const std::vector< long > &  array, double  useThisSize, long  precision = -1  ) const

inline

encode() [12/12]

double helib::EncryptedArrayCx::encode	(	zzX &	ptxt,
		double	aSingleNumber,
		double	useThisSize = -1,
		long	precision = -1
	)		const

encodei()

double helib::EncryptedArrayCx::encodei	(	zzX &	ptxt,
		long	precision = -1
	)		const

encodeRoundingError()

double helib::EncryptedArrayCx::encodeRoundingError ( ) const

inline

encodeScalingFactor()

long helib::EncryptedArrayCx::encodeScalingFactor ( long  precision = -1, double  roundErr = -1.0  ) const

inline

encodeUnitSelector()

void helib::EncryptedArrayCx::encodeUnitSelector ( zzX &  ptxt, long  i  ) const

inlineoverridevirtual

Encodes a std::vector with 1 at position i and 0 everywhere else.

Implements helib::EncryptedArrayBase.

encrypt() [1/2]

template<typename PTXT >

void helib::EncryptedArrayCx::encrypt ( Ctxt &  ctxt, const PubKey &  key, const PTXT &  ptxt  ) const

inline

encrypt() [2/2]

template<typename PTXT >

void helib::EncryptedArrayCx::encrypt ( Ctxt &  ctxt, const PubKey &  key, const PTXT &  ptxt, double  useThisSize, long  precision = -1  ) const

inline

encryptOneNum()

void helib::EncryptedArrayCx::encryptOneNum ( Ctxt &  ctxt, const PubKey &  key, double  num, double  useThisSize = -1, long  precision = -1  ) const

inline

extractImPart() [1/2]

void helib::EncryptedArrayCx::extractImPart	(	Ctxt &	c,
		DoubleCRT *	dcrt = nullptr
	)		const

Note: If called with dcrt==nullptr, extractImPart will perform FFT's when encoding i as a DoubleCRT object. If called with dcrt!=nullptr, it assumes that dcrt points to an object that encodes i.

extractImPart() [2/2]

template<typename Scheme >

void helib::EncryptedArrayCx::extractImPart ( Ptxt< Scheme > &  p ) const

inline

Extract the imaginary part of a CKKS plaintext.

Template Parameters

Scheme

Encryption scheme to be used (must be CKKS).

Parameters

p	Plaintext on which to operate.

extractRealPart() [1/2]

void helib::EncryptedArrayCx::extractRealPart

(

Ctxt &

c

)

const

extractRealPart() [2/2]

template<typename Scheme >

void helib::EncryptedArrayCx::extractRealPart ( Ptxt< Scheme > &  p ) const

inline

Extract the real part of a CKKS plaintext.

Template Parameters

Scheme

Encryption scheme to be used (must be CKKS).

Parameters

p	Plaintext on which to operate.

getContext()

const Context& helib::EncryptedArrayCx::getContext ( ) const

inlineoverridevirtual

Implements helib::EncryptedArrayBase.

getDegree()

long helib::EncryptedArrayCx::getDegree ( ) const

inlineoverridevirtual

Implements helib::EncryptedArrayBase.

getiEncoded()

const zzX & helib::EncryptedArrayCx::getiEncoded

(

)

const

getP2R()

long helib::EncryptedArrayCx::getP2R ( ) const

inlineoverridevirtual

Implements helib::EncryptedArrayBase.

getPAlgebra()

const PAlgebra& helib::EncryptedArrayCx::getPAlgebra ( ) const

inlineoverridevirtual

Implements helib::EncryptedArrayBase.

getTag()

PA_tag helib::EncryptedArrayCx::getTag ( ) const

inlineoverridevirtual

Implements helib::EncryptedArrayBase.

random() [1/4]

void helib::EncryptedArrayCx::random	(	std::vector< cx_double > &	array,
		double	rad = 1.0
	)		const

random() [2/4]

void helib::EncryptedArrayCx::random ( std::vector< double > &  array, double  rad = 1.0  ) const

inline

random() [3/4]

void helib::EncryptedArrayCx::random ( std::vector< long > &  array ) const

inlineoverridevirtual

Implements helib::EncryptedArrayBase.

random() [4/4]

void helib::EncryptedArrayCx::random ( UNUSED std::vector< NTL::ZZX > &  array ) const

inlineoverride

Unimplemented random function for BGV. It will always throw helib::LogicError.

Parameters

array

Unused.

rotate()

void helib::EncryptedArrayCx::rotate ( Ctxt &  ctxt, long  k  ) const

overridevirtual

Right rotation as a linear array. E.g., rotating ctxt=Enc(1 2 3 ... n) by k=1 gives Enc(n 1 2 ... n-1)

Implements helib::EncryptedArrayBase.

rotate1D()

void helib::EncryptedArrayCx::rotate1D ( Ctxt &  ctxt, long  i, long  k, bool  dc = false  ) const

overridevirtual

right-rotate k positions along the i'th dimension

Parameters

dc	means "don't care", which means that the caller guarantees that only zero elements rotate off the end – this allows for some optimizations that would not otherwise be possible

Implements helib::EncryptedArrayBase.

roundedSize()

static double helib::EncryptedArrayCx::roundedSize ( double  x )

inlinestatic

shift()

void helib::EncryptedArrayCx::shift ( Ctxt &  ctxt, long  k  ) const

overridevirtual

Non-cyclic right shift with zero fill E.g., shifting ctxt=Enc(1 2 3 ... n) by k=1 gives Enc(0 1 2... n-1)

Implements helib::EncryptedArrayBase.

shift1D()

void helib::EncryptedArrayCx::shift1D ( Ctxt &  ctxt, long  i, long  k  ) const

overridevirtual

Right shift k positions along the i'th dimension with zero fill.

Implements helib::EncryptedArrayBase.