The true RNG uses electromagnetic noise to generate completely random and completely unpredictable values. The breakthrough happened when he had spotted that slot machines were using an insecure PRNG algorithm that might be predictable. He also learned about PRNG (Pseudo Random Number Generators), how they work and how they are used in slot machines. To do the job, Alex had to learn in detail about how these machines work internally. Īlex, the guy who deciphered the PRNG used by slots and made millionsĪlex was working as a freelance programmer and hacker when a Russian casino hired him to manipulate the RTP of some Novomatic slot machines. The credit for publishing the details about this story goes to and Brendan Koerner. This story is so mind-blowing that I have decided to spend some time with it, and delve in for a deeper analysis of the techniques he used. Petersburg, who managed to successfully predict the spin outcome on certain models of slot machines and used this to his advantage to milk millions from casinos around the world. However, by far the most interesting case is the story from the very recent past (2009-2018) of a Russian guy from St. They managed to find a software glitch and used it in their favor. In another group of cases, players were just unusually lucky. Some cases involved a casino insider who helped to manipulate the slot machine. These usually include tools to manipulate a slot machine’s hardware, namely its coin dispenser or note acceptor. But in reality, there are many documented cases of players who managed to trick slots into paying them out much more than the casino owners’ had hoped. Properly designed slots which work with true Random Number Generators are theoretically unbeatable. Appendix: How Alex’s algorithm might work.Slot machine frauds, HW manipulation, and special tools.Alex, the guy who deciphered the PRNG used by slots and made millions.

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