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Old 2007-11-23, 20:18   #2
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Jun 2003

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Originally Posted by jasong View Post
The passcode is 64 bits, meaning 2^64 combinations, but there's a bug in the software. Each time you attempt a guess, you find out if the number of bits that are correct is odd or even
The bug gives exactly one bit of information -- namely, the parity of the passcode. Additional tries will not give any additional information. So the only way you'll ever crack a passcode is if you get the whole code right at one go and the door opens. So your best strategy is to join the guards and watch some porn ;)
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