![]() ![]() Here's how it works: Wi-Fi-enabled devices, including PCs, iPhones, iPads, and Android phones, transmit a unique hardware identifier, called a MAC address, to anyone within a radius of approximately 100 to 200 feet. Entering Doty's unique hardware ID into Google's database returns his former home in the Capitol Hill neighborhood in Seattle. "I was surprised to see such precise data on where my laptop-and I-used to live," says Nick Doty, a lecturer at the University of California at Berkeley who co-teaches the Technology and Policy Lab. ![]()
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