noisy

type KeyStruct ¶

type KeyStruct struct {
	TheSecKey *OTNHMultiIPESecKey
}

type MyKeyStruct ¶

type MyKeyStruct struct {
	TheSecKey *NHMultiIPESecKey
}

type NHMultiIPE ¶

type NHMultiIPE struct {
	Params *NHMultiIPEParams
}

NHMultiIPE represents a Function Hiding Multi-input Inner Product Encryption scheme based on the paper by P. Datta, T. Okamoto, and J. Tomida: "Full-Hiding (Unbounded) Multi-Input Inner Product Functional Encryption from the 𝒌-Linear Assumption". It allows clients to encrypt vectors {x_1,...,x_m} and derive a secret key based on an inner product vectors {y_1,...,y_m} so that a decryptor can decrypt the sum of inner products <x_1,y_1> + ... + <x_m, y_m> without revealing vectors x_i or y_i. The scheme is slightly modified from the original one to achieve a better performance. The difference is in storing the secret master key as matrices B, BStar, instead of matrices of elliptic curve elements g_1^B, g_2^BStar. This replaces elliptic curves operations with matrix multiplication.

This struct contains the shared choice for parameters on which the functionality of the scheme depend.

func NewNHMultiIPE(secLevel, numClients, vecLen int, boundX, boundY *big.Int) *NHMultiIPE

func NewNHMultiIPEFromParams(params *NHMultiIPEParams) *NHMultiIPE

func (f *NHMultiIPE) Decrypt(cipher data.MatrixG1, key data.MatrixG2, pubKey *bn256.GT) (*big.Int, error)

func (f NHMultiIPE) DeriveKey(y data.Matrix, secKey *NHMultiIPESecKey, noise int64) (data.MatrixG2, error)

func (f NHMultiIPE) DeriveKeyFake(a *int64)

func (f NHMultiIPE) Encrypt(x data.Vector, partSecKey data.Matrix) (data.VectorG1, error)

func (f NHMultiIPE) GenerateKeys() (*NHMultiIPESecKey, *bn256.GT, error)

type NHMultiIPEParams ¶

type NHMultiIPEParams struct {
	SecLevel   int
	NumClients int
	VecLen     int
	BoundX     *big.Int
	BoundY     *big.Int
}

NHMultiIPEParams represents configuration parameters for the NHMultiIPE scheme instance. SecLevel (int): The parameter defines the security assumption of the scheme, so called k-Lin assumption, where k is the specified SecLevel. NumClients (int): The number of clients participating VecLen (int): The length of vectors that clients encrypt. BoundX (int): The value by which the coordinates of encrypted vectors are bounded. BoundY (int): The value by which the coordinates of inner product vectors are bounded.

type NHMultiIPESecKey ¶

type NHMultiIPESecKey struct {
	BHat     []data.Matrix
	BStarHat []data.Matrix
}

NHMultiIPESecKey represents a master secret key in NHMultiIPE scheme.

type OTNHMultiIPE ¶

type OTNHMultiIPE struct {
	Params *OTNHMultiIPEParams
}

OTNHMultiIPE represents a onte time noise Hiding Multi-input Inner Product Encryption scheme based on the paper by P. Datta, T. Okamoto, and J. Tomida: This struct contains the shared choice for parameters on which the functionality of the scheme depend.

func NewOTNHMultiIPE(secLevel, numClients, vecLen int, boundX, boundY *big.Int) *OTNHMultiIPE

func NewOTNHMultiIPEFromParams(params *OTNHMultiIPEParams) *OTNHMultiIPE

func (f *OTNHMultiIPE) Decrypt(cipher data.MatrixG1, key data.MatrixG2, pubKey *bn256.GT) (*big.Int, error)

func (f OTNHMultiIPE) DeriveKey(y data.Matrix, secKey *OTNHMultiIPESecKey, noise int64) (data.MatrixG2, error)

func (f OTNHMultiIPE) DeriveKeyFake(a *int64)

func (f OTNHMultiIPE) Encrypt(x data.Vector, partSecKey data.Matrix) (data.VectorG1, error)

func (f OTNHMultiIPE) GenerateKeys() (*OTNHMultiIPESecKey, *bn256.GT, error)

type OTNHMultiIPEParams ¶

type OTNHMultiIPEParams struct {
	SecLevel   int
	NumClients int
	VecLen     int
	BoundX     *big.Int
	BoundY     *big.Int
}

OTNHMultiIPEParams represents configuration parameters for the oTNHMultiIPE scheme instance. SecLevel (int): The parameter defines the security assumption of the scheme, so called k-Lin assumption, where k is the specified SecLevel. NumClients (int): The number of clients participating VecLen (int): The length of vectors that clients encrypt. BoundX (int): The value by which the coordinates of encrypted vectors are bounded. BoundY (int): The value by which the coordinates of inner product vectors are bounded.

type OTNHMultiIPESecKey ¶

type OTNHMultiIPESecKey struct {
	BHat     []data.Matrix
	BStarHat []data.Matrix
}

OTNHMultiIPESecKey represents a master secret key in OTNHMultiIPE scheme.