Entropy testers: Robert Brown's dieharder: http://www.phy.duke.edu/~rgb/General/dieharder.php http://www.phy.duke.edu/~rgb/General/dieharder.php NIST Statisti

Entropy testers: Robert Brown's dieharder: http://www.phy.duke.edu/~rgb/General/dieharder.php http://www.phy.duke.edu/~rgb/General/dieharder.php NIST Statistical Test Suite: http://csrc.nist.gov/groups/ST/toolkit/rng/index.html http://csrc.nist.gov/groups/ST/toolkit/rng/index.html Fourmilab's ENT: http://www.fourmilab.ch/random/ http://www.fourmilab.ch/random/