Here you can find the source of generateKey(final SecureRandom srand)
public static byte[] generateKey(final SecureRandom srand) throws NoSuchAlgorithmException
//package com.java2s; /*/*from w w w. j a v a 2 s . c o m*/ Copyright (C) 2013 Tobias Baum <tbaum at tntinteractive.de> This file is a part of Portalsammler. Portalsammler is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Portalsammler is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Portalsammler. If not, see <http://www.gnu.org/licenses/>. */ import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; public class Main { public static byte[] generateKey(final SecureRandom srand) throws NoSuchAlgorithmException { final byte[] key = new byte[256 / 8]; srand.nextBytes(key); return key; } }