org.cryptimeleon.math.structures.groups.lazy

Class LazyBilinearGroup

java.lang.Object

org.cryptimeleon.math.structures.groups.lazy.LazyBilinearGroup

All Implemented Interfaces:

Representable, StandaloneRepresentable, BilinearGroup

Direct Known Subclasses:

BarretoNaehrigBilinearGroup, SupersingularBilinearGroup

public class LazyBilinearGroup
extends java.lang.Object
implements BilinearGroup

A BilinearGroupImpl wrapper implementing deferred (lazy) evaluation.

Allows for additional optimizations using information about the operations being applied.

For more information, see the documentation.

Nested Class Summary

Nested classes/interfaces inherited from interface org.cryptimeleon.math.structures.groups.elliptic.BilinearGroup

BilinearGroup.Type

Field Summary

Fields

Modifier and Type	Field and Description
protected BilinearGroupImpl	impl

Constructor Summary

Constructors

Constructor and Description
LazyBilinearGroup(BilinearGroupImpl impl)
LazyBilinearGroup(Representation repr)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
LazyBilinearMap	getBilinearMap() Returns the BilinearMap (contains the pairing operation) belonging to this BilinearGroup.
LazyGroup	getG1() Returns the source group G1 associated with this bilinear group.
LazyGroup	getG2() Returns the source group G2 associated with this bilinear group.
LazyGroup	getGT() Returns the target group GT associated with this bilinear group.
HashIntoLazyGroup	getHashIntoG1() Retrieves a hash function that maps byte arrays to G1.
HashIntoLazyGroup	getHashIntoG2() Retrieves a hash function that maps byte arrays to G2.
HashIntoLazyGroup	getHashIntoGT() Retrieves a hash function that maps byte arrays to GT.
LazyGroupHomomorphism	getHomomorphismG2toG1() Retrieves the homomorphism from G2 to G1 if it exists.
BilinearGroup.Type	getPairingType()
Representation	getRepresentation() The representation of this object.
java.lang.Integer	getSecurityLevel()
int	hashCode()
protected void	instantiateBasicStuff()
java.lang.String	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.BilinearGroup

getHashIntoZGroupExponent, getZn, size

Field Detail

impl

protected BilinearGroupImpl impl

Constructor Detail

LazyBilinearGroup

public LazyBilinearGroup(BilinearGroupImpl impl)

LazyBilinearGroup

public LazyBilinearGroup(Representation repr)

Method Detail

instantiateBasicStuff

protected void instantiateBasicStuff()

getG1

public LazyGroup getG1()

Description copied from interface: BilinearGroup

Returns the source group G1 associated with this bilinear group.

Specified by:

getG1 in interface BilinearGroup

getG2

public LazyGroup getG2()

Description copied from interface: BilinearGroup

Returns the source group G2 associated with this bilinear group.

Specified by:

getG2 in interface BilinearGroup

getGT

public LazyGroup getGT()

Description copied from interface: BilinearGroup

Returns the target group GT associated with this bilinear group.

Specified by:

getGT in interface BilinearGroup

getBilinearMap

public LazyBilinearMap getBilinearMap()

Description copied from interface: BilinearGroup

Returns the BilinearMap (contains the pairing operation) belonging to this BilinearGroup.

Specified by:

getBilinearMap in interface BilinearGroup

getHomomorphismG2toG1

public LazyGroupHomomorphism getHomomorphismG2toG1()
                                            throws java.lang.UnsupportedOperationException

Description copied from interface: BilinearGroup

Retrieves the homomorphism from G2 to G1 if it exists.

Specified by:

getHomomorphismG2toG1 in interface BilinearGroup

Throws:

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

getHashIntoG1

public HashIntoLazyGroup getHashIntoG1()
                                throws java.lang.UnsupportedOperationException

Description copied from interface: BilinearGroup

Retrieves a hash function that maps byte arrays to G1.

Specified by:

getHashIntoG1 in interface BilinearGroup

Throws:

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

getHashIntoG2

public HashIntoLazyGroup getHashIntoG2()
                                throws java.lang.UnsupportedOperationException

Description copied from interface: BilinearGroup

Retrieves a hash function that maps byte arrays to G2.

Specified by:

getHashIntoG2 in interface BilinearGroup

Throws:

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

getHashIntoGT

public HashIntoLazyGroup getHashIntoGT()
                                throws java.lang.UnsupportedOperationException

Description copied from interface: BilinearGroup

Retrieves a hash function that maps byte arrays to GT.

Specified by:

getHashIntoGT in interface BilinearGroup

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()

Specified by:

getSecurityLevel in interface BilinearGroup

getPairingType

public BilinearGroup.Type getPairingType()

Specified by:

getPairingType in interface BilinearGroup

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

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object