Researchers have revealed a security loophole where hackers or governments can hijack wireless signals to identify and track people without their permission, even if their phones are turned off.

Researchers warn that ordinary WiFi routers could be exploited to identify and track people using radio wave analysis, raising new concerns about invisible surveillance.

Researchers have revealed a security loophole where hackers or governments can hijack wireless signals to identify and track people without their permission, even if their phones…