Package 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

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      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