Random number generators

"Anyone who uses arithmetic methods to produce random numbers is in a state of sin."
-- John von Neumann.

Paradise Poker has an interesting page on how they generate random numbers for their Internet casinos, and why most random number generators can't shuffle even a small list of items properly. For example, a standard deck of cards can be shuffled 52! different ways (more than 10⁶⁷, or ten thousand billion billion billion billion billion billion billion). A 32-bit random number generator can generate at most four billion combinations -- clearly inadequate.