C# Class MpcLib.SecretSharing.ShamirSharing

Implemenets the threshold secret sharing scheme based on Adi Shamir's method.

Datei anzeigen Open project: mahdiz/mpclib Class Usage Examples

Public Methods

Method	Description
CalculateRandomShare ( Zp myShare, IList polyUpdate ) : Zp	The i-th user gets a Qj(i) List from users, each user j calculated Qj(i) - the j element in the List
CheckSharedSecrets ( Zp secret, int numberOfPlayers, int polynomDeg, int prime ) : bool
DetailedShare ( Zp secret, int numPlayers, int polynomDeg ) : ShareDetails	Evaluates the shared secrets of secret with polynom of degree t and numberOfPlayers players.
GetRandomizedShares ( int numPlayers, int polynomDeg, int prime ) : IList	Creates a random poynomial Qj(x), for the j player, and creates a list of elements, such that the i-th element is Qj(i)
GetRandomizedSharesByzantineCase ( int numPlayers, int polynomDeg, int prime ) : IList	Creates a random poynomial Qj(x) ,for the j player,and creates a list of elements, such that the i-th element is Qj(i)
PrimitiveShare ( Zp secret, int numPlayers, int polynomDeg ) : IList
Recombine ( IList sharedSecrets, int polynomDeg, int prime ) : Zp
Recombine ( IList sharedSecrets, int polyDeg, int prime, bool usePrimitiveRecombine ) : Zp	Recombines (interpolate) the secret from secret shares.
Share ( Zp secret, int numPlayers, int polyDeg ) : IList	Calculates the shares of a secret with polynomial of degree t and numPlayers players.
Share ( Zp secret, int numPlayers, int polyDeg, IList &coeffs ) : IList	Calculates the shares of a secret with polynomial of degree t and numPlayers players. The method also returns the array of coefficients of the polynomial.
SimpleRecombine ( IList sharedSecrets, int polyDeg, int prime ) : Zp

Private Methods

Method	Description
Share ( Zp secret, int numPlayers, int polynomDeg, bool usePrimitiveShare, IList &coeffs ) : IList	Evaluates the shares of secret with polynomial of degree 'polynomDeg' and 'numPlayers' players.
TruncateVector ( Zp vector, int toSize ) : Zp[]

Method Details

CalculateRandomShare() public static method

The i-th user gets a Qj(i) List from users, each user j calculated Qj(i) - the j element in the List

public static CalculateRandomShare ( Zp myShare, IList polyUpdate ) : Zp
myShare	Zp
polyUpdate	IList
return	Zp

CheckSharedSecrets() public static method

public static CheckSharedSecrets ( Zp secret, int numberOfPlayers, int polynomDeg, int prime ) : bool
secret	Zp
numberOfPlayers	int
polynomDeg	int
prime	int
return	bool

DetailedShare() public static method

Evaluates the shared secrets of secret with polynom of degree t and numberOfPlayers players.

public static DetailedShare ( Zp secret, int numPlayers, int polynomDeg ) : ShareDetails
secret	Zp
numPlayers	int
polynomDeg	int
return	ShareDetails

GetRandomizedShares() public static method

Creates a random poynomial Qj(x), for the j player, and creates a list of elements, such that the i-th element is Qj(i)

public static GetRandomizedShares ( int numPlayers, int polynomDeg, int prime ) : IList
numPlayers	int
polynomDeg	int
prime	int
return	IList

GetRandomizedSharesByzantineCase() public static method

Creates a random poynomial Qj(x) ,for the j player,and creates a list of elements, such that the i-th element is Qj(i)

public static GetRandomizedSharesByzantineCase ( int numPlayers, int polynomDeg, int prime ) : IList
numPlayers	int
polynomDeg	int
prime	int
return	IList

PrimitiveShare() public static method

public static PrimitiveShare ( Zp secret, int numPlayers, int polynomDeg ) : IList
secret	Zp
numPlayers	int
polynomDeg	int
return	IList

Recombine() public static method

public static Recombine ( IList sharedSecrets, int polynomDeg, int prime ) : Zp
sharedSecrets	IList
polynomDeg	int
prime	int
return	Zp

Recombine() public static method

Recombines (interpolate) the secret from secret shares.

public static Recombine ( IList sharedSecrets, int polyDeg, int prime, bool usePrimitiveRecombine ) : Zp
sharedSecrets	IList
polyDeg	int
prime	int
usePrimitiveRecombine	bool
return	Zp

Share() public static method

Calculates the shares of a secret with polynomial of degree t and numPlayers players.

public static Share ( Zp secret, int numPlayers, int polyDeg ) : IList
secret	Zp
numPlayers	int
polyDeg	int
return	IList

Share() public static method

Calculates the shares of a secret with polynomial of degree t and numPlayers players. The method also returns the array of coefficients of the polynomial.

public static Share ( Zp secret, int numPlayers, int polyDeg, IList &coeffs ) : IList
secret	Zp
numPlayers	int
polyDeg	int
coeffs	IList
return	IList

SimpleRecombine() public static method

public static SimpleRecombine ( IList sharedSecrets, int polyDeg, int prime ) : Zp
sharedSecrets	IList
polyDeg	int
prime	int
return	Zp