Recognizing Keystrokes Using WiFi Devices
11 points by Yogthos
11 points by Yogthos
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From the abstract, it is unclear if the devices need to be on the same network or not.
The ACM site has the full paper: https://dl.acm.org/doi/epdf/10.1145/2789168.2790109
The two wifi devices need to be on the same network because it is subtle changes in the network that reveal details about finger movements between the devices, but the keyboard can be on some other device on another network or no network at all.