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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.crypto.params;

import java.math.BigInteger;

/**
 * Public key parameters for NaccacheStern cipher. For details on this cipher,
 * please see
 * 
 * https://www.gemplus.com/smart/rd/publications/pdf/NS98pkcs.pdf
 */
public class NaccacheSternKeyParameters extends AsymmetricKeyParameter
{

    private BigInteger g, n;

    int lowerSigmaBound;

    /**
     * @param privateKey
     */
    public NaccacheSternKeyParameters(boolean privateKey, BigInteger g, BigInteger n, int lowerSigmaBound)
    {
        super(privateKey);
        this.g = g;
        this.n = n;
        this.lowerSigmaBound = lowerSigmaBound;
    }

    /**
     * @return Returns the g.
     */
    public BigInteger getG()
    {
        return g;
    }

    /**
     * @return Returns the lowerSigmaBound.
     */
    public int getLowerSigmaBound()
    {
        return lowerSigmaBound;
    }

    /**
     * @return Returns the n.
     */
    public BigInteger getModulus()
    {
        return n;
    }

}