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I love playing on a computer...but what about XG cheating???

Posted By: Michael Petch
Date: Monday, 3 August 2015, at 2:52 a.m.

In Response To: I love playing on a computer...but what about XG cheating??? (Sean Garber)

You could ask each player to choose some random number between 1 and some large number (Maybe 2^32-1) without revealing the number to the other player. A pre-established method of taking the 2 numbers (one from each player) and combining them into one number would be known ahead of time. This process is done by a third party and entered into the bot. At the end of a match you could verify the combined seed (and its output) by both players making their numbers known to each other.

Unfortunately it is possible with many PRNG algorithms (including Mersenne) to determine the the current state of the PRNG (based on enough previous rolls) which would allow someone to compute the future rolls. Using a PRNG like Blum Blum Shub would solve this problem.

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