org.cryptimeleon.craco.secretsharing.accessstructure.utils

Class RandomFunction

java.lang.Object

org.cryptimeleon.craco.secretsharing.accessstructure.utils.RandomFunction

public class RandomFunction
extends java.lang.Object

Represents a random polynomial, where only the value at position 0 is set. This is for example used in Shamir secret sharing

Constructor Summary

Constructors

Constructor and Description
RandomFunction(java.math.BigInteger deg, org.cryptimeleon.math.structures.rings.zn.Zp.ZpElement zeroValue, org.cryptimeleon.math.structures.rings.zn.Zp zpField) Creates a new random polynomial of degree deg over the field.

Method Summary

Modifier and Type	Method and Description
org.cryptimeleon.math.structures.rings.zn.Zp.ZpElement	getValueFor(java.math.BigInteger x) Return the value of the polynomial evaluated at x.

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomFunction

public RandomFunction(java.math.BigInteger deg,
                      org.cryptimeleon.math.structures.rings.zn.Zp.ZpElement zeroValue,
                      org.cryptimeleon.math.structures.rings.zn.Zp zpField)

Creates a new random polynomial of degree deg over the field. The value of the zeroth degree coefficient is zeroValue .

Parameters:

deg - degree of the created polynomial

zeroValue - value of zeroth degree coefficient

zpField - field over which the polynomial is defined

Method Detail

getValueFor

public org.cryptimeleon.math.structures.rings.zn.Zp.ZpElement getValueFor(java.math.BigInteger x)

Return the value of the polynomial evaluated at x. Applies Horner scheme.

Parameters:

x - position to evaluate

Returns:

result of evaluation at position x