Whenever the slot machine is turned on, the random number generator is spitting out whole numbers (typically between 1 and several billion) hundreds of times. Here's a little video I did, when I was thinking of creating a course on how to beat the casino. Never did create. Information on the random number generators that online casinos use to and roulette games, as well as for keno, video poker and video slot machines. They offer a full range of testing and consulting to both online and brick and mortar casinos and gambling companies. I hope no one will follow the advice in this answer. An insider attack is all it takes to break the. But there's always the insider angle, or a well resourced malicious actor that could force reinitialization and just wait and see exactly what time that key was turned. A nice payoff for drawing the red ball.