🚨A new surveillance method identifies and tracks you using Wi-Fi signals — without needing a phone, camera, or wearable.

Developed by researchers at La Sapienza University of Rome, the system has been dubbed "WhoFi."

Ir reads how Wi-Fi waves interact with a person’s body, essentially creating a unique biometric “fingerprint” based on the way wireless signals bounce off them.

This allows a person to be identified and re-identified across rooms and even different locations, all without visible technology or consent.

Unlike previous attempts at similar tracking, which topped out at 75% accuracy, WhoFi leverages neural networks and standard, low-cost Wi-Fi routers to achieve unprecedented precision. The implications are enormous: this could revolutionize everything from retail analytics to law enforcement surveillance, raising pressing questions about privacy. The system works even through walls and in the dark, potentially making it more powerful than traditional camera systems. While still in the experimental stage, the technology’s reliance on widely available hardware suggests it could be deployed at scale sooner than most would expect.

source

D Avola. et al., "WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding." July 2025. arxiv

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