org.bouncycastle.crypto.prng
Class ThreadedSeedGenerator

java.lang.Object
  org.bouncycastle.crypto.prng.ThreadedSeedGenerator

public class ThreadedSeedGenerator
extends java.lang.Object

A thread based seed generator - one source of randomness.

Based on an idea from Marcus Lippert.

Constructor Summary

ThreadedSeedGenerator()

Method Summary

byte[]

generateSeed(int numBytes, boolean fast) Generate seed bytes.

Methods inherited from class java.lang.Object

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

Constructor Detail

ThreadedSeedGenerator

public ThreadedSeedGenerator()

Method Detail

generateSeed

public byte[] generateSeed(int numBytes,
                           boolean fast)

Generate seed bytes. Set fast to false for best quality.

If fast is set to true, the code should be round about 8 times faster when generating a long sequence of random bytes. 20 bytes of random values using the fast mode take less than half a second on a Nokia e70. If fast is set to false, it takes round about 2500 ms.

Parameters:

numBytes - the number of bytes to generate

fast - true if fast mode should be used