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Artificial Intelligence vs. the Hackers

Machine-learning algorithms watch hackers’ behavior and adapt to their evolving tactics.

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Illustration: Ben Lemoine

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Last year, Microsoft Corp.’s Azure security team detected suspicious activity in the cloud computing usage of a large retailer: One of the company’s administrators, who usually logs on from New York, was trying to gain entry from Romania. And no, the admin wasn’t on vacation. A hacker had broken in.

Microsoft quickly alerted its customer, and the attack was foiled before the intruder got too far.