Ordinary Wi-Fi can reveal your identity — scientists have discovered a threat

Researchers have found that Wi-Fi signals can identify people with nearly 100% accuracy, even without a smartphone or network connection. The method analyzes beamforming feedback signals, which may be transmitted without encryption. The technology raises questions about personal data protection.

Researchers have demonstrated a technology that can identify people through Wi-Fi signals with accuracy approaching 100%, even if the person does not have a smartphone or other connected device. The method is based on analyzing beamforming feedback data — information exchanged between routers and connected devices, which may be transmitted without encryption. The human body affects the propagation of radio waves, and the system creates a kind of radio image for subsequent recognition. The experiment involved 197 people. Researcher Julien Todt noted that a person regularly passing near an establishment with Wi-Fi could be detected and identified without their knowledge. Professor Thorsten Strufe of the Karlsruhe Institute of Technology warned of the need for privacy protection mechanisms. The technology raises questions about personal data protection and the potential use of wireless network infrastructure for covert surveillance.