Machine learning technologies can help companies spot suspicious user behaviors, malicious software, and fraudulent purchases -- but even as the defensive technologies are getting better, attackers are finding ways to get around them. Many defensive systems need to be tuned, or tune themselves, in order to appropriately respond to possible threats. Smoke alarms that go off each time someone microwaves popcorn get replaced with less sensitive ones, or are moved farther away from the kitchen. Old-school crowbar-and-ski mask crooks already know this. "If there's a motion detector and I ride my bike by innocently and set off their alarm, and do that every day for a month, they'll either turn the motion detector off or recalibrate it," said Steve Grobman, Intel Security CTO at Intel.