Longreads

A Russian mathematician from St. Petersburg named Alex has quite the talent: he reverse engineers the pseudorandom number generators (PRNGs) that govern how slot machines behave. His team of field agents roams casinos around the world and “milk” the machines whose algorithms they’ve cracked.

Here’s how it works: an agent records a video of a targeted slot machine, sends the footage back to St. Petersburg, and Alex analyzes the slot’s behavior to determine the moment it will pay out. “By using these cues to beat slots in multiple casinos,” writes Brendan Koerner in Wired, “a four-person team can earn more than $250,000 a week.”

After interviewing Alex on the record, Koerner tells the story of this programmer-turned-hacker and what he views as his Robin Hood-like crusade against the global gambling industry.

In the course of reverse engineering Novomatic’s software, Alex encountered his first PRNG. He was instantly fascinated…

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