Ordinary WiFi can now identify you with near-perfect accuracy
AI Summary: Researchers at KASTEL, KIT's Institute of Information Security and Dependability, have found that WiFi signals can be used to identify individuals and map their surroundings without requiring cameras or connected devices. The technique analyzes radio waves moving through a space, using beamforming feedback information (BFI) transmitted by devices connected to a WLAN. In a study of 197 participants, the system achieved almost 100% identification accuracy, raising concerns about potential surveillance risks. The method can be implemented using standard WiFi devices, turning ordinary routers into potential surveillance tools.