org.bouncycastle.pqc.math.ntru.polynomial

Class DenseTernaryPolynomial

java.lang.Object

org.bouncycastle.pqc.math.ntru.polynomial.IntegerPolynomial

org.bouncycastle.pqc.math.ntru.polynomial.DenseTernaryPolynomial

All Implemented Interfaces:

Polynomial, TernaryPolynomial

public class DenseTernaryPolynomial
extends IntegerPolynomial
implements TernaryPolynomial

A TernaryPolynomial with a "high" number of nonzero coefficients.

Field Summary

Fields inherited from class org.bouncycastle.pqc.math.ntru.polynomial.IntegerPolynomial

coeffs

Constructor Summary

Constructors

Constructor and Description
DenseTernaryPolynomial(int[] coeffs) Constructs a new DenseTernaryPolynomial with a given set of coefficients.
DenseTernaryPolynomial(IntegerPolynomial intPoly) Constructs a DenseTernaryPolynomial from a IntegerPolynomial.

Method Summary

Modifier and Type	Method and Description
static DenseTernaryPolynomial	generateRandom(int N, int numOnes, int numNegOnes, java.security.SecureRandom random) Generates a random polynomial with numOnes coefficients equal to 1, numNegOnes coefficients equal to -1, and the rest equal to 0.
static DenseTernaryPolynomial	generateRandom(int N, java.security.SecureRandom random) Generates a polynomial with coefficients randomly selected from {-1, 0, 1}.
int[]	getNegOnes()
int[]	getOnes()
IntegerPolynomial	mult(IntegerPolynomial poly2, int modulus) Multiplies the polynomial with another, taking the values mod modulus and the indices mod N
int	size() Returns the maximum number of coefficients the polynomial can have

Methods inherited from class org.bouncycastle.pqc.math.ntru.polynomial.IntegerPolynomial

add, add, center0, centeredNormSq, clear, clone, count, div, ensurePositive, equals, equalsOne, fromBinary, fromBinary, fromBinary3Sves, fromBinary3Tight, fromBinary3Tight, invertF3, invertFq, mod, mod3, modPositive, mult, mult, mult, mult3, resultant, resultant, resultantMultiThread, rotate1, sub, sub, sumCoeffs, toBinary, toBinary3Sves, toBinary3Tight, toIntegerPolynomial

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.bouncycastle.pqc.math.ntru.polynomial.TernaryPolynomial

clear, mult

Methods inherited from interface org.bouncycastle.pqc.math.ntru.polynomial.Polynomial

mult, toIntegerPolynomial

Constructor Detail

DenseTernaryPolynomial

public DenseTernaryPolynomial(IntegerPolynomial intPoly)

Constructs a DenseTernaryPolynomial from a IntegerPolynomial. The two polynomials are independent of each other.

Parameters:

intPoly - the original polynomial

DenseTernaryPolynomial

public DenseTernaryPolynomial(int[] coeffs)

Constructs a new DenseTernaryPolynomial with a given set of coefficients.

Parameters:

coeffs - the coefficients

Method Detail

generateRandom

public static DenseTernaryPolynomial generateRandom(int N,
                                                    int numOnes,
                                                    int numNegOnes,
                                                    java.security.SecureRandom random)

Generates a random polynomial with numOnes coefficients equal to 1, numNegOnes coefficients equal to -1, and the rest equal to 0.

Parameters:

N - number of coefficients

numOnes - number of 1's

numNegOnes - number of -1's

generateRandom

public static DenseTernaryPolynomial generateRandom(int N,
                                                    java.security.SecureRandom random)

Generates a polynomial with coefficients randomly selected from {-1, 0, 1}.

Parameters:

N - number of coefficients

mult

public IntegerPolynomial mult(IntegerPolynomial poly2,
                              int modulus)

Description copied from class: IntegerPolynomial

Multiplies the polynomial with another, taking the values mod modulus and the indices mod N

Specified by:

mult in interface Polynomial

Overrides:

mult in class IntegerPolynomial

Parameters:

poly2 - a polynomial

modulus - a modulus to apply

Returns:

the product of the two polynomials

getOnes

public int[] getOnes()

Specified by:

getOnes in interface TernaryPolynomial

getNegOnes

public int[] getNegOnes()

Specified by:

getNegOnes in interface TernaryPolynomial

size

public int size()

Description copied from interface: TernaryPolynomial

Returns the maximum number of coefficients the polynomial can have

Specified by:

size in interface TernaryPolynomial