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Thread: Exploiting Casino PRNGs

  1. #1

    Default Exploiting Casino PRNGs

    (Yes, it's technically illegal, since they are using a device. But it's an interesting article and exploit nonetheless.)

    https://www.wired.com/2017/02/russia...asinos-no-fix/

    In essence, they would relay reel positions for off-site analysis, and the team would figure out precisely when to press the "spin" button, and relay that back to the player. As usual, they get greedy, and it gets figured out. But I can understand that with a large team they need a lot of payout to make it worthwhile. I can think of a few ways to make this less detectable.

    (Even better, to figure it out without a device!)

  2. #2

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    Those damn Russians - first they hack our election and now our slot machines!
    "The dogs bark but the caravan moves on."
    .....................The Zengrifter Interview (PDF) |
    The Zengrifter / James Grosjean Reputation Debate
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    “Truth, like gold, is obtained not by growth, but by washing away all that is not gold.” — Leo Tolstoy........
    "Is everything a conspiracy? No, just the important stuff." ZG

  3. #3

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    Quote Originally Posted by JohnDoe View Post
    (Yes, it's technically illegal, since they are using a device. But it's an interesting article and exploit nonetheless.)

    https://www.wired.com/2017/02/russia...asinos-no-fix/

    In essence, they would relay reel positions for off-site analysis, and the team would figure out precisely when to press the "spin" button, and relay that back to the player. As usual, they get greedy, and it gets figured out. But I can understand that with a large team they need a lot of payout to make it worthwhile. I can think of a few ways to make this less detectable.

    (Even better, to figure it out without a device!)
    This was an interesting article JD. I like reading about obscure gaming stories such as this. These guys seem like they had a pretty sophisticated slot cheat going on. I wonder how and the hell they got the idea to do such a thing and how they figured it out. Either way I'm sure they field tested it in their own home base before deploying their agents of evil upon the casinos around the world. JD what kind of technical people would one need on their team to figure out such a scam?

  4. #4

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    Quote Originally Posted by Blitzkrieg View Post
    This was an interesting article JD. I like reading about obscure gaming stories such as this. These guys seem like they had a pretty sophisticated slot cheat going on. I wonder how and the hell they got the idea to do such a thing and how they figured it out. Either way I'm sure they field tested it in their own home base before deploying their agents of evil upon the casinos around the world. JD what kind of technical people would one need on their team to figure out such a scam?
    It does take some solid engineering. I haven't studied it, but it's possible that the weakness leaked from someone from the company that makes the machines, or they had a machine of their own to experiment with. It takes a lot of study to work out the pattern, but it can be done given enough time.

    I think 1-2 people with decent math background (or insider knowledge) could study the reels, and writing the software after is very easy. Then you have as many as practical go and exploit it.

    I've often thought something like this could be exploited with CSM, but there's no reason to take the risks with using a device for analysis. Better to spend time looking for HC opportunities and such.

  5. #5

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    Quote Originally Posted by JohnDoe View Post
    It does take some solid engineering. I haven't studied it, but it's possible that the weakness leaked from someone from the company that makes the machines, or they had a machine of their own to experiment with.
    They were able to buy a few machines due to Putin's closure of the Moscow casino industry.
    This isn't the first time a gaming PRNG was exploited - back in 2000 a college kid cracked a Canadian casino's keno PRNG.
    "The dogs bark but the caravan moves on."
    .....................The Zengrifter Interview (PDF) |
    The Zengrifter / James Grosjean Reputation Debate
    -----------------------------------------
    “Truth, like gold, is obtained not by growth, but by washing away all that is not gold.” — Leo Tolstoy........
    "Is everything a conspiracy? No, just the important stuff." ZG

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