Ordinary Wi-Fi can identify people with nearly 100% accuracy
“Better the devil you know ...” That’s a worst-case scenario outlook. The best case is an angel you know. But what if that angel was somewhat of a devil all along? Researchers have shown that ordinary Wi-Fi technology can serve as a powerful surveillance tool.
Researchers at Germany’s Karlsruhe Institute of Technology (KIT) have shown that ordinary Wi-Fi traffic can identify individuals with almost 100% accuracy, without a camera, dedicated sensing hardware, or requiring the person being watched to carry a phone or any device at all.
The enabling system, created by the researchers, uses machine learning to analyze information that Wi-Fi devices already send back to their routers. As a person moves through the room, their body physically alters the radio waves traveling through it. Those alterations contain enough biometric information for the system to "learn" a person and later distinguish them from everyone else, much like a radio...
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