de.bb.security
Class SecureRandom

java.lang.Object
  |
  +--java.util.Random
        |
        +--de.bb.security.SecureRandom

All Implemented Interfaces:

java.io.Serializable

public class SecureRandom

extends java.util.Random

This class provides a crytpographically strong pseudo-random number generator based on the SHA-1 hash algorithm.

The calls inherited from Random will be implemented in terms of the strengthened functionality.

See Also:

Random, Serialized Form

Field Summary

static SecureRandom

instance

Constructor Summary

SecureRandom()
ct of SecureRandom

Method Summary

protected int	next(int bits) generate the next random bits
void	setSeed(byte[] b) Set a new seed.
void	setSeed(long l) Set a new seed.

Methods inherited from class java.util.Random

nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static final SecureRandom instance

Constructor Detail

SecureRandom

public SecureRandom()

ct of SecureRandom

Method Detail

setSeed

public final void setSeed(long l)

Set a new seed. Even setting the same seed again, this will *NOT* reproduce the same random values!

Overrides:

setSeed in class java.util.Random

Parameters:

l - - the long to add to the seed

setSeed

public final void setSeed(byte[] b)

Set a new seed. Even setting the same seed again, this will *NOT* reproduce the same random values!

Parameters:

b - - the byte array to add to the seed;

next

protected final int next(int bits)

generate the next random bits

Overrides:

next in class java.util.Random

Parameters:

bits - - count of new generated bits

Returns:

an integer containing the generated random bits