org.bouncycastle.crypto.prng

Class ThreadedSeedGenerator


public class ThreadedSeedGenerator
extends java.lang.Object

A thread based seed generator - one source of randomness.

Based on an idea from Marcus Lippert.

Method Summary

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

Method Details

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