org.cryptimeleon.math.structures.groups

Class RingUnitGroupImpl.RingUnitGroupElementImpl

java.lang.Object

org.cryptimeleon.math.structures.groups.RingGroupImpl.RingGroupElementImpl

org.cryptimeleon.math.structures.groups.RingUnitGroupImpl.RingUnitGroupElementImpl

All Implemented Interfaces:

UniqueByteRepresentable, Representable, GroupElementImpl

Enclosing class:

RingUnitGroupImpl

public class RingUnitGroupImpl.RingUnitGroupElementImpl
extends RingGroupImpl.RingGroupElementImpl

A ring element interpreted as an element of the ring's unit group. Note that such an element is not equal (according to equals()) to its original ring element. Use projectToRing() to interpret the element as a ring element again.

Also, note that you could potentially wrap non-units in a RingUniGroupElement. This is not checked (but obviously discouraged). The invert operation will fail.

Field Summary

Fields inherited from class org.cryptimeleon.math.structures.groups.RingGroupImpl.RingGroupElementImpl

element

Constructor Summary

Constructors

Constructor and Description
RingUnitGroupElementImpl(RingElement e)

Method Summary

Modifier and Type	Method and Description
RingUnitGroupImpl	getStructure() Retrieves the group this element belongs to.
RingUnitGroupImpl.RingUnitGroupElementImpl	inv() Calculates the inverse of this group element.
RingUnitGroupImpl.RingUnitGroupElementImpl	op(GroupElementImpl e) Calculates the result of this op e.
RingUnitGroupImpl.RingUnitGroupElementImpl	pow(java.math.BigInteger exponent) Calculates the result of applying the group operation k times.
ByteAccumulator	updateAccumulator(ByteAccumulator accumulator) Updates the ByteAccumulator with the unique byte representation of this object.

Methods inherited from class org.cryptimeleon.math.structures.groups.RingGroupImpl.RingGroupElementImpl

equals, getRepresentation, hashCode, projectToRing, 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.GroupElementImpl

isNeutralElement, square

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

getUniqueByteRepresentation

Constructor Detail

RingUnitGroupElementImpl

public RingUnitGroupElementImpl(RingElement e)

Method Detail

op

public RingUnitGroupImpl.RingUnitGroupElementImpl op(GroupElementImpl e)

Description copied from interface: GroupElementImpl

Calculates the result of this op e.

Parameters:

e - right hand side of the operation

Returns:

the element resulting from the group operation

pow

public RingUnitGroupImpl.RingUnitGroupElementImpl pow(java.math.BigInteger exponent)

Description copied from interface: GroupElementImpl

Calculates the result of applying the group operation k times.

getStructure

public RingUnitGroupImpl getStructure()

Description copied from interface: GroupElementImpl

Retrieves the group this element belongs to.

inv

public RingUnitGroupImpl.RingUnitGroupElementImpl inv()

Description copied from interface: GroupElementImpl

Calculates the inverse of this group element.

Returns:

an element x such that x.op(this).equals(getStructure().getNeutralElement())

updateAccumulator

public ByteAccumulator updateAccumulator(ByteAccumulator accumulator)

Description copied from interface: UniqueByteRepresentable

Updates the ByteAccumulator with the unique byte representation of this object.

The input to the accumulators update function is an injective (with respect to a given domain) byte encoding of this object.

For many use-cases, the AnnotatedUbrUtil can be used to quickly implement this method.

Returns:

the same accumulator as was input