like i mentioned in another comment, do you really need good resolution for gait analysis? You also have people carrying their phones inside the house all the time, so you know what bssid is associated with that coarse movement. and if you have access to their ap/router combo, you can tell what IP that device has and what domains it's been visiting.
Let's say you visit a friend in a different city, the same ISP controlling their router, can use your mac, but even if you turn off your wifi or leave your phone in your car, your volume profile and gait can betray you. how you sit, how you lean, how you turn. I'd wager, if 6-10 distinct "points" can be made out and associated with a person, that's all that's needed to uniquely identify that person after enough analysis of their motion, regardless of where they go in the world.
Imagine if they're not using one AP, but using your neighbors AP as well, two neighbor APs and your own can triangulate and refine much better.
> In China cameras use your gait to automatically ticket you for J-walking and automatically deduct funds from your bank account. I’ve read that before at least.
China is a huge place with a population larger than the entire western world combined, so I don't doubt something like that could be happening somewhere. Maybe it was a tech demo?
However in general that is not a thing. If you pick any of China's megacities and walk down a street it will take you all of 5 seconds to realize how absolutely not a thing that is. Jaywalking is rampant, so obviously there's efforts to crack down on it, but I've yet to see anyone be shy about it around cameras*.
* And cameras really are everywhere. Though I suspect a lot are closer to a decorative prop for deterrence than a surveillance tool.
"If I have nothing to hide I have nothing to fear" eh?
What a colossally bad thing to do for personal privacy. Yes let's give governments the ability to spot and pick up anyone they want for any reason under the guise of 'criminality'. ICE or the SS would have a field day.
I guess people better keep their mouth shut if they know what is good for them??
Let's say you visit a friend in a different city, the same ISP controlling their router, can use your mac, but even if you turn off your wifi or leave your phone in your car, your volume profile and gait can betray you. how you sit, how you lean, how you turn. I'd wager, if 6-10 distinct "points" can be made out and associated with a person, that's all that's needed to uniquely identify that person after enough analysis of their motion, regardless of where they go in the world.
Imagine if they're not using one AP, but using your neighbors AP as well, two neighbor APs and your own can triangulate and refine much better.