A fascinating new study, recently highlighted by DezDok, shows that Wi-Fi signals can be used to recognize individuals - not just detect presence or movement.
By analyzing subtle variations in the Channel State Information (CSI), researchers have trained AI models to capture unique human signatures created as Wi-Fi waves bounce off the human body. The results? Achieve up to 95% re-identification accuracy, even through walls, without relying on cameras or wearables.
This breakthrough opens new directions for sensing-aware communication systems - imagine integrated Wi-Fi networks that can perceive and respond intelligently to human activity.
But it also raises important ethical and privacy questions about surveillance, consent, and data security in everyday wireless environments.
As someone working at the intersection of optical and wireless communication systems, I find this a reminder of how deeply our communication channels are evolving into sensing systems.
Would you welcome such technology in smart buildings or healthcare?
Or do you see it as a step too far into invisible surveillance?
