Well, gait is usable as a biometric identifier. While most approaches use video analysis, I found this a paper [1] that is about identifying people through footstep induced structural vibration using a geophone[2].
It would be quite interesting if it is possible to measure the structural vibration using a laptops or smartphones built in accelerometers.
But I think acoustic sensors would be a better way. Or a combination of both options.
Interesting - can you provide [1] and [2] please?
Yikes, it was a bit too late in my timezone, sorry.
[1]: https://www.andrew.cmu.edu/user/shijiapa/documentations/Hotm...
webcam vibration changing the field of view could be a decent proxy for laptops.
In any case, I wonder if detecting vibrations and recognizing the boss via machine learning wouldn't be more elegant.