org.cryptimeleon.math.structures.groups.elliptic.type3.bn

Class BarretoNaehrigSourceGroupElementImpl

java.lang.Object

org.cryptimeleon.math.structures.groups.elliptic.AbstractEllipticCurvePoint

org.cryptimeleon.math.structures.groups.elliptic.AffineEllipticCurvePoint

org.cryptimeleon.math.structures.groups.elliptic.PairingSourceGroupElement

org.cryptimeleon.math.structures.groups.elliptic.type3.bn.BarretoNaehrigSourceGroupElementImpl

All Implemented Interfaces:

UniqueByteRepresentable, Representable, EllipticCurvePoint, GroupElementImpl

Direct Known Subclasses:

BarretoNaehrigGroup1ElementImpl, BarretoNaehrigGroup2ElementImpl

public abstract class BarretoNaehrigSourceGroupElementImpl
extends PairingSourceGroupElement

Abstract class for elements of both G1 and G2.

Constructor Summary

Constructors

Constructor and Description
BarretoNaehrigSourceGroupElementImpl(BarretoNaehrigSourceGroupImpl curve)
BarretoNaehrigSourceGroupElementImpl(BarretoNaehrigSourceGroupImpl curve, FieldElement x, FieldElement y)

Method Summary

Modifier and Type	Method and Description
int	compressX() Compresses the point to an integer.
BarretoNaehrigSourceGroupElementImpl	pow(java.math.BigInteger e) Calculates the result of applying the group operation k times.

Methods inherited from class org.cryptimeleon.math.structures.groups.elliptic.AffineEllipticCurvePoint

add, computeLine, equals, inv, isNormalized, normalize, updateAccumulator

Methods inherited from class org.cryptimeleon.math.structures.groups.elliptic.AbstractEllipticCurvePoint

getFieldOfDefinition, getRepresentation, getStructure, getX, getY, getZ, hashCode, isNeutralElement, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.cryptimeleon.math.structures.groups.elliptic.EllipticCurvePoint

op

Methods inherited from interface org.cryptimeleon.math.structures.groups.GroupElementImpl

square

Methods inherited from interface org.cryptimeleon.math.hash.UniqueByteRepresentable

getUniqueByteRepresentation

Constructor Detail

BarretoNaehrigSourceGroupElementImpl

public BarretoNaehrigSourceGroupElementImpl(BarretoNaehrigSourceGroupImpl curve,
                                            FieldElement x,
                                            FieldElement y)

BarretoNaehrigSourceGroupElementImpl

public BarretoNaehrigSourceGroupElementImpl(BarretoNaehrigSourceGroupImpl curve)

Method Detail

pow

public BarretoNaehrigSourceGroupElementImpl pow(java.math.BigInteger e)

Description copied from interface: GroupElementImpl

Calculates the result of applying the group operation k times.

compressX

public int compressX()

Compresses the point to an integer.

Compress point (x,y) by mapping x to an integer i in {0,1,2} such that this.getStructure().mapToPoint(y,this.compress(x,y)).equals(this). Hence (y,i) is a compression of (x,y) of approximately half size.

Returns:

compression of x