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I am trying and failing to find an article where a poker website published their source code, including how they shuffled cards and seeded their randomness. The

I am trying and failing to find an article where a poker website published their source code, including how they shuffled cards and seeded their randomness. The seed was the current timestamp. Someone realized an efficient way to reduce the search space, assuming vaguely accurate clocks, and predict every card distributed at the table after viewing only a small number of cards.

charcircuit 3y ago
This sounds similar https://github.com/ech0ii/forceitbox https://github.com/ech0ii/forceitbox Also for an example of exploiting a gambling site that used javascript's Math.random https://jonasnick.github.io/blog/2015/07/08/exploiting-csgojackpots-weak-rng/ https://jonasnick.github.io/blog/2015/07/08/exploiting-csgoj...
Tangurena2 3y ago
This is probably the article you are looking for: https://www.developer.com/guides/how-we-learned-to-cheat-at-online-poker-a-study-in-software-security/ https://www.developer.com/guides/how-we-learned-to-cheat-at-... The timestamp was down to a fraction of a second, so instead of having 52! possible decks (about 2^226) there were only 2^32 possible decks that could be generated by the algorithm. Also: https://blog.codinghorror.com/shuffling/ https://blog.codinghorror.com/shuffling/