Wi-Fi-tapping: Detecting Hidden Gestures Through Walls

It turns out that you can use ambient WiFi signal not only to figure out if there is someone inside the room across the wall who you can’t see but also events like someone petting, handshaking or kicking! Amazing paper from MIT CSAIL: https://arxiv.org/abs/1909.09300 https://x.com/eturner303/status/1182137105696182272

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