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Added: 35a36
The consensus of the Cambridge University Computer Laboratory Security Group informal meeting seemed to agree. It was noted that once a host has the output they could use a fake user (in a multi-player game) to default if they thought the output bad for them, and that casinos who finished games as "fail" too frequently should be suspected.
Changed: 53c54
DouglasReay write: Someone at the Cambridge University Computer Laboratory Security Group suggested 150 bits should be sufficient. I think I'd like to see it larger than that, because making the usertext fixed length simplifies things, and I'd like to see it significantly larger (say 150 bits larger) than 55 factorial (52 card deck + 3 jokers).
Changed: 74c75,76
::::[HalFinney] wrote: Hmmm, I'd have to think about that. There might be a way to do it, but it's not clear. The problem is that some cards get revealed only to one player, and I can't see how to let the dealer show that he is behaving properly in the general case where there is partial information about the cards. If you have any ideas along this line I'd love to hear them
::::[HalFinney] wrote: Hmmm, I'd have to think about that. There might be a way to do it, but it's not clear. The problem is that some cards get revealed only to one player, and I can't see how to let the dealer show that he is behaving properly in the general case where there is partial information about the cards. If you have any ideas along this line I'd love to hear them. :::::DouglasReay wrote: I put this problem to RossAnderson?, who thinks he has a way. Details may be forthcoming.