India, July 24 -- What if we told you that researchers at La Sapienza University of Rome have introduced a new way to identify individuals by analysing how their bodies affect Wi-Fi signals? Sounds made up, right? But it's real. This system is called WhoFi and works without cameras, microphones, or the person carrying any device. It detects unique changes in wireless signals caused by a person's size, shape, and movement.

Wi-Fi signals spread through spaces and bounce off or are absorbed by objects, including people. Everyone's body interacts with these signals in a slightly different way. WhoFi captures these small changes by measuring details like signal amplitude and phase. The system then uses a neural network to learn each person's ...