Hidden WiFi Signals Could Identify You Without a Device
Researchers warn that ordinary, unencrypted WiFi signals exchanged between devices and routers can be used to form radio images of people and identify them with near-100% accuracy—even if they’re not carrying a phone or other connected gadget—raising concerns that everyday networks could become covert surveillance systems. The method relies on beamforming feedback, was tested with 197 participants, and experts say privacy protections must be built into future WiFi systems to prevent widespread monitoring by governments or corporations.
