Adding to the technological horror show is a troubling new system known as “WhoFi,” a high-tech apparatus that can track humans through Wi-Fi.

A team of researchers at the Sapienza University of Rome recently released a paper outlining a new system capable of detecting “biometric signatures” through distortions in Wi-Fi signals. Notably, the system can surveil humans regardless of lighting conditions, and can sense them through walls.

The researchers say that WhoFi can capture “rich biometric information,” identifying individual people with a 95.5 percent accuracy rate.