org.cryptimeleon.math.structures.groups.debug

Class DebugBilinearGroupImpl

java.lang.Object

org.cryptimeleon.math.structures.groups.debug.DebugBilinearGroupImpl

All Implemented Interfaces:

Representable, StandaloneRepresentable, BilinearGroupImpl

public class DebugBilinearGroupImpl
extends java.lang.Object
implements BilinearGroupImpl

A BilinearGroupImpl implementing a fast, but insecure pairing over Zn. Allows for selecting between counting total group operations, or (multi-)exponentiations plus group operations outside of (multi-)exponentiations.

Usually, you should be using DebugBilinearGroup instead of this class as it provides pairing counting capabilities and allows for tracking both kinds of group operation data at once.

See Also:

DebugBilinearGroup

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.Boolean	enableExpMultiExpCounting Whether to count exponentiations and multi-exponentiations as a single unit.
protected BilinearGroup.Type	pairingType The type of pairing this bilinear group should offer.
protected java.lang.Integer	securityParameter The security level offered by this bilinear group in number of bits.
protected java.math.BigInteger	size The group order of this bilinear group.

Constructor Summary

Constructors

Constructor and Description
DebugBilinearGroupImpl(java.math.BigInteger groupSize, BilinearGroup.Type pairingType, boolean enableExpMultiExpCounting)
DebugBilinearGroupImpl(Representation repr)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object other)
BilinearMapImpl	getBilinearMap() Returns the BilinearMapImpl (contains the pairing operation) belonging to this BilinearGroupImpl.
DebugGroupImpl	getG1() Returns the source group G1 implementation associated with this bilinear group implementation.
DebugGroupImpl	getG2() Returns the source group G2 implementation associated with this bilinear group implementation.
DebugGroupImpl	getGT() Returns the target group G2 implementation associated with this bilinear group implementation.
HashIntoGroupImpl	getHashIntoG1() Retrieves a hash function implementation that maps byte arrays to G1.
HashIntoGroupImpl	getHashIntoG2() Retrieves a hash function implementation that maps byte arrays to G2.
HashIntoGroupImpl	getHashIntoGT() Retrieves a hash function implementation that maps byte arrays to GT.
GroupHomomorphismImpl	getHomomorphismG2toG1() Retrieves the homomorphism implementation from G2 to G1 if it exists.
BilinearGroup.Type	getPairingType() Returns the type of pairing offered by this bilinear group.
Representation	getRepresentation() The representation of this object.
java.lang.Integer	getSecurityLevel() Returns the security level offered by this bilinear group in number of bits.
int	hashCode()
protected void	init()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

securityParameter

protected java.lang.Integer securityParameter

The security level offered by this bilinear group in number of bits.

pairingType

protected BilinearGroup.Type pairingType

The type of pairing this bilinear group should offer.

size

protected java.math.BigInteger size

The group order of this bilinear group.

enableExpMultiExpCounting

protected java.lang.Boolean enableExpMultiExpCounting

Whether to count exponentiations and multi-exponentiations as a single unit. If set to true, group operations in those (multi-)exponentiations will not be counted. Instead (multi-)exponentiations will be counted as a single unit.

Constructor Detail

DebugBilinearGroupImpl

public DebugBilinearGroupImpl(java.math.BigInteger groupSize,
                              BilinearGroup.Type pairingType,
                              boolean enableExpMultiExpCounting)

DebugBilinearGroupImpl

public DebugBilinearGroupImpl(Representation repr)

Method Detail

init

protected void init()

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getRepresentation

public Representation getRepresentation()

Description copied from interface: Representable

The representation of this object. Used for serialization. A convenient way to implement this is using @link ReprUtil

Specified by:

getRepresentation in interface Representable

Returns:

a Representation or null if an equal object can be recreated without any information.

See Also:

Representation

getG1

public DebugGroupImpl getG1()

Description copied from interface: BilinearGroupImpl

Returns the source group G1 implementation associated with this bilinear group implementation.

Specified by:

getG1 in interface BilinearGroupImpl

getG2

public DebugGroupImpl getG2()

Description copied from interface: BilinearGroupImpl

Returns the source group G2 implementation associated with this bilinear group implementation.

Specified by:

getG2 in interface BilinearGroupImpl

getGT

public DebugGroupImpl getGT()

Description copied from interface: BilinearGroupImpl

Returns the target group G2 implementation associated with this bilinear group implementation.

Specified by:

getGT in interface BilinearGroupImpl

getBilinearMap

public BilinearMapImpl getBilinearMap()

Description copied from interface: BilinearGroupImpl

Returns the BilinearMapImpl (contains the pairing operation) belonging to this BilinearGroupImpl.

Specified by:

getBilinearMap in interface BilinearGroupImpl

getHomomorphismG2toG1

public GroupHomomorphismImpl getHomomorphismG2toG1()
                                            throws java.lang.UnsupportedOperationException

Description copied from interface: BilinearGroupImpl

Retrieves the homomorphism implementation from G2 to G1 if it exists.

Specified by:

getHomomorphismG2toG1 in interface BilinearGroupImpl

Throws:

java.lang.UnsupportedOperationException - if no such homomorphism exists or the bilinear group is not configured to support such functionality

getHashIntoG1

public HashIntoGroupImpl getHashIntoG1()
                                throws java.lang.UnsupportedOperationException

Description copied from interface: BilinearGroupImpl

Retrieves a hash function implementation that maps byte arrays to G1.

Specified by:

getHashIntoG1 in interface BilinearGroupImpl

Throws:

java.lang.UnsupportedOperationException - if no such hash function exists or the bilinear group is not configured to support such functionality

getHashIntoG2

public HashIntoGroupImpl getHashIntoG2()
                                throws java.lang.UnsupportedOperationException

Description copied from interface: BilinearGroupImpl

Retrieves a hash function implementation that maps byte arrays to G2.

Specified by:

getHashIntoG2 in interface BilinearGroupImpl

Throws:

java.lang.UnsupportedOperationException - if no such hash function exists or the bilinear group is not configured to support such functionality

getHashIntoGT

public HashIntoGroupImpl getHashIntoGT()
                                throws java.lang.UnsupportedOperationException

Description copied from interface: BilinearGroupImpl

Retrieves a hash function implementation that maps byte arrays to GT.

Specified by:

getHashIntoGT in interface BilinearGroupImpl

Throws:

java.lang.UnsupportedOperationException - if no such hash function exists or the bilinear group is not configured to support such functionality

getSecurityLevel

public java.lang.Integer getSecurityLevel()

Returns the security level offered by this bilinear group in number of bits.

Specified by:

getSecurityLevel in interface BilinearGroupImpl

getPairingType

public BilinearGroup.Type getPairingType()

Returns the type of pairing offered by this bilinear group.

Specified by:

getPairingType in interface BilinearGroupImpl

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object