Your Wi-Fi Is the Eavesdropper’s Radar: How to Counter Privacy Threats...
summary
A prototype 256‑element IRS (≈30×40 cm, ≈$100) operating near 5.35 GHz toggles 5% of elements 20×/s with periodic full inversions; this IRShield introduces randomized channel variation and reduces a state‑of‑the‑art eavesdropped human‑motion detector to below 5% detection (often 0%) while leaving Wi‑Fi packet error rates and throughput essentially unchanged. The attack uses commodity routers that export CSI, and the countermeasure is device‑agnostic plug‑and‑play.
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chapters (9)
- 0:00Wi-Fi privacy threats
- 3:41Wi-Fi physical layer basics
- 9:28Wireless sensing overview
- 11:58Adversarial wireless sensing
- 14:29Eavesdropping attack demo
- 20:12Encryption vs physical attacks
- 22:19IR Shield countermeasure
- 39:47IR Shield performance impact
- 41:32Summary
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