[jaifraic]

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.

[suhlig]

Interesting - can you provide [1] and [2] please?

[jaifraic]

Yikes, it was a bit too late in my timezone, sorry.

[1]: https://www.andrew.cmu.edu/user/shijiapa/documentations/Hotm...

[2]: https://en.wikipedia.org/wiki/Geophone