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

Class BarretoNaehrigParameterSpec

java.lang.Object

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

public class BarretoNaehrigParameterSpec
extends java.lang.Object

Represents a fixed parametrization of a Barreto-Naehrig bilinear group.

See Also:

BarretoNaehrigBilinearGroup(BarretoNaehrigParameterSpec), BarretoNaehrigBilinearGroup(String), BarretoNaehrigBasicBilinearGroup(BarretoNaehrigParameterSpec), BarretoNaehrigBasicBilinearGroup(String)

Field Summary

Fields

Modifier and Type	Field and Description
java.math.BigInteger	alpha
java.math.BigInteger	b
java.math.BigInteger	beta0
java.math.BigInteger	beta1
java.math.BigInteger	characteristic
java.lang.String	hash
java.lang.String	pairing
java.math.BigInteger	size
java.math.BigInteger	u
java.math.BigInteger	x1
java.math.BigInteger	x20
java.math.BigInteger	x21
java.math.BigInteger	y1
java.math.BigInteger	y20
java.math.BigInteger	y21

Constructor Summary

Constructors

Constructor and Description

BarretoNaehrigParameterSpec(java.math.BigInteger u, java.math.BigInteger characteristic, java.math.BigInteger size, java.math.BigInteger alpha, java.math.BigInteger beta0, java.math.BigInteger beta1, java.math.BigInteger b, java.math.BigInteger x1, java.math.BigInteger y1, java.math.BigInteger x20, java.math.BigInteger x21, java.math.BigInteger y20, java.math.BigInteger y21, java.lang.String pairing, java.lang.String hash)

Method Summary

Modifier and Type	Method and Description
static BarretoNaehrigParameterSpec	getParameters(java.lang.String spec) Returns the BarretoNaehrigParameterSpec belonging to the given spec string.
static BarretoNaehrigParameterSpec	sfc256() Returns parameters for a BN instantiation where the group order is 256 bits long, resulting in a security parameter of roughly 100 bits.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

u

public final java.math.BigInteger u

characteristic

public final java.math.BigInteger characteristic

size

public final java.math.BigInteger size

alpha

public final java.math.BigInteger alpha

beta0

public final java.math.BigInteger beta0

beta1

public final java.math.BigInteger beta1

b

public final java.math.BigInteger b

x1

public final java.math.BigInteger x1

y1

public final java.math.BigInteger y1

x20

public final java.math.BigInteger x20

x21

public final java.math.BigInteger x21

y20

public final java.math.BigInteger y20

y21

public final java.math.BigInteger y21

pairing

public final java.lang.String pairing

hash

public final java.lang.String hash

Constructor Detail

BarretoNaehrigParameterSpec

public BarretoNaehrigParameterSpec(java.math.BigInteger u,
                                   java.math.BigInteger characteristic,
                                   java.math.BigInteger size,
                                   java.math.BigInteger alpha,
                                   java.math.BigInteger beta0,
                                   java.math.BigInteger beta1,
                                   java.math.BigInteger b,
                                   java.math.BigInteger x1,
                                   java.math.BigInteger y1,
                                   java.math.BigInteger x20,
                                   java.math.BigInteger x21,
                                   java.math.BigInteger y20,
                                   java.math.BigInteger y21,
                                   java.lang.String pairing,
                                   java.lang.String hash)

Method Detail

sfc256

public static BarretoNaehrigParameterSpec sfc256()

Returns parameters for a BN instantiation where the group order is 256 bits long, resulting in a security parameter of roughly 100 bits.

getParameters

public static BarretoNaehrigParameterSpec getParameters(java.lang.String spec)

Returns the BarretoNaehrigParameterSpec belonging to the given spec string.

The currently available specs are:

• "SFC-256": a 256 bit size spec resulting in a security level of roughly 100 bits

Parameters:

spec - a String specifying the parameter spec

Returns:

the corresponding spec

Throws:

java.lang.IllegalArgumentException - if the given spec string does not correspond to any