this post was submitted on 16 Aug 2026
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Ordinary WiFi can now identify you with near-perfect accuracy (www.sciencedaily.com)
submitted 4 days ago* (last edited 4 days ago) by floofloof@lemmy.ca to c/privacy@lemmy.world
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cross-posted from: https://lemmy.bestiver.se/post/1289547

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[–] moldy_rice@piefed.keyboardvagabond.com 2 points 4 days ago

They're using BFI to form 3d images using WiFi radios

Connected devices routinely send information back to the router to help optimize wireless communication. These signals, known as beamforming feedback information (BFI), are transmitted without encryption, meaning that anyone within range can potentially read them.

By analyzing that information, the system can generate images of people from multiple viewpoints. Those images can then be used to determine a person's identity.