peoples bodies leave FINGERPRINT ON WIFI based on the way how they block WIFI radiation when it hits them, everyone is different!

UNIQUE BLUETOOTH SIGNATURE

he can say "Jack is there, in that multistorey aparment altough his mobile phone aint there" and he would be right

https://arxiv.org/html/2507.12869v1

"The core insight is that as a Wi-Fi signal propagates through an environment, its waveform is altered by the presence and physical characteristics of objects and people along its path," the authors state in their paper.

"These alterations, captured in the form of Channel State Information (CSI), contain rich biometric information." CSI in the context of Wi-Fi devices refers to information about the amplitude and phase of electromagnetic transmissions. These measurements, the researchers say, interact with the human body in a way that results in person-specific distortions. When processed by a deep neural network, the result is a unique data signature.

Researchers proposed a similar technique, dubbed EyeFi, in 2020, and asserted it was accurate about 75 percent of the time. The Rome-based researchers who proposed WhoFi claim their technique makes accurate matches on the public NTU-Fi dataset up to 95.5 percent of the time when the deep neural network uses the transformer encoding architecture.

"The encouraging results achieved confirm the viability of Wi-Fi signals as a robust and privacy-preserving biometric modality, and position this study as a meaningful step forward in the development of signal-based Re-ID systems," the authors say.

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since 2022 it became easier than ever before because people now have no free will, they are vaccinated and contorlled by commands sent by AI from 5G connection