Why do people come up with the same discussions every week on the same thread?  The random number generation used in just-dice is secure.  it takes entropy from OpenSSL's RAND_bytes function which is as secure as you can get without resorting to custom hardware - if you're worried about OpenSSL's RAND_bytes function then be worried about the ephemeral keys used to secure the SSL you use to talk to your bank.

Once it has these random bytes (the seed) it then uses HMAC_512 to generate all the random numbers for the player.  This is predictable because the game has to be provably fair, but it is not possible to determine or predict anything about the output of the function without knowing the server seed (see above).

I wish we could just put these PRNG vs RNG vs TRNG arguments to rest for good.

Will