"Jim Choate" <[EMAIL PROTECTED]> wrote: > But that changes the game in the middle of play, the sequence of digits > in pi is fixed, not random. You can't get a random number from a constant. > Otherwise it wouldn't be a constant. PRNG output is fixed/repeatable too - that is a properly you *want* from a PRNG. any subset of the digits of pi is as close to RNG output as you would need to satisfy any entropy tests - unless you *knew* you had derived it from pi you couldn't distinguish it from a true random string of the same size.
> You can't stop them from using their tables. Slow them down, not stop > them. You can't use that huge a seed, hardware limitations. They can match > you. *shrug* given that adding a bit to the seed doubles the quantity of data they would have to cache in their tables, it can quickly become unworkable; the single-digit-of-pi formula is too slow to form a good stream cypher, but is otherwise ok; if you aren't constrained to matching a real world sequence (pi in this case) but are happy with *any* non-repeating but deterministic stream, you can probably find something much faster.
