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by eru 795 days ago
They wanted to show that they didn't cheat.

In general, you can pick a random seed at the start of the day, commit to it somewhere (eg publish a hash of it on the bitcoin blockchain, or just on your website), then use that seed in a cryptographically secure PRNG on your website all day, and at the end of the day you publish the seed you already committed to.

This way people can check that you didn't cheat, but can't guess their opponents cards either.
2 comments
thenewnewguy 795 days ago
Wouldn't the most obvious method of cheating be the site owner peeking at other player's hands and/or the deck? Which this doesn't (and cannot) prevent?

I guess I'm not sure what publicizing their PRNG is meant to prove. It shows they didn't cheat via a very specific type of cheating but there are several other potential cheating vectors.

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eru 793 days ago
> It shows they didn't cheat via a very specific type of cheating but there are several other potential cheating vectors.

Yes, and this is not the only anti-cheat method they had.

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eru 795 days ago
(The above was simplified. In a game of poker, you also want to make sure that when hands get folded, that no one learns what the cards were.)
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