In general, use a pool and worry less for most purposes as long as some of them are good enough. An old project of mine: http://random.hd.org/ http://random.h

In general, use a pool and worry less for most purposes as long as some of them are good enough. An old project of mine: http://random.hd.org/ http://random.hd.org/ It was good enough to use for a financial application when whitened / XORed with system sources.