Java tutorial
import java.security.NoSuchAlgorithmException; import java.security.Provider; import java.security.SecureRandom; public class Main { public static void main(String[] args) throws NoSuchAlgorithmException { int numBytes = (new Integer("1111")).intValue(); SecureRandom srand = new SecureRandom(new byte[] { 1, 2, 3, 4 }); Provider provider = srand.getProvider(); System.out.println(provider.getName()); byte[] bytes = new byte[numBytes]; srand.nextBytes(bytes); System.out.println(bytes); } }