Modified random variable to use java.security.SecureRandom for authentication challenge genration.

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.util.Calendar;

import java.util.Random;

import java.security.SecureRandom;

/**

 * This class implements the javax.obex.HeaderSet interface for OBEX over

    private Long[] mIntegerUserDefined; // 4 byte unsigned integer

    private final Random mRandom;

    private final SecureRandom mRandom;

    /*package*/ byte[] nonce;

        mByteUserDefined = new Byte[16];

        mIntegerUserDefined = new Long[16];

        responseCode = -1;

        mRandom = new Random();

        mRandom = new SecureRandom();

    }

    /**