Scientists in Germany have demonstrated a startling new form of surveillance: identifying people using nothing more than ordinary WiFi signals. By analyzing how radio waves bounce around a room, researchers can effectively “see” and recognize individuals — even if they are not carrying a device and even if their phone is turned off.
“Identify” seems like a very misleading word in this context. Isn’t it just detecting and locating? Or am I misunderstanding and they can tell me and my roommate appart?
Height and body mass