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.
I was watching a video the other day that was showing WiFi sensing using TOMMY which uses channel state information (CSI) - something this article describes as the previous approach. That was already quite impressive, although not nearly as powerful as this teaser hints at.
We’ll have to wait for thehang on, the Taipei conference was last year so this is old news. Here’s the paper: https://publikationen.bibliothek.kit.edu/1000185756