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1

If I know the initial state and the time window that the first player pressed the button, I can just run the LFSR up to and through that time window. The first player's token will match one of these states, which means you know the LFSR state after player 1 has gone. You can repeat this to find the token for player 2, since applying the inversion gives you ...


2

Here is an attack that I think will, with excellent odds, allow certain determination of which value is on the ticket of colluding players; and consequently give an advantage on guessing the tickets of these colluding players, and a (typically lesser) advantage on guessing the tickets of honest players. I'm assuming: The adversary knows the value on every ...


1

The master keys are kept very securely and are used to generate session keys which enable the decryption of the high-precision codes only for a limited time. Some military underling has the unfortunate task of priming all the GPS equipment with the codes for the time period for which their use is anticipated. It's common for the equipment to forget the keys ...


4

Am I going to regret posting this? There seems to be enough non-classified information available about GPS to answer this question. I see 3 reasons why P(Y) encryption is different and less likely to be hacked than game console encryption: Hardware containing the GPS decryption key is more difficult to obtain than hardware containing the game console ...



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