Everyday WiFi Could Identify You Without a Device
TL;DR Summary
German researchers demonstrated that ordinary WiFi signals can identify people with near-perfect accuracy by analyzing how radio waves reflect off their bodies using beamforming feedback information, even if the person isn’t carrying a device or has their phone off. The finding raises serious privacy concerns, suggesting routers could serve as covert surveillance tools; experts urge safeguards in the upcoming IEEE 802.11bf standard.
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