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nothing. And banning ALPR wont fix anything either. All cars have 4 unique serial numbers broadcast via radio at all times via the TPMS system. you don't even
by calvinmorrison 11mo ago
nothing. And banning ALPR wont fix anything either. All cars have 4 unique serial numbers broadcast via radio at all times via the TPMS system. you don't even need a camera, just a radio receiver.
- 1shooner 11mo ago> banning ALPR wont fix anything either. Ideally the implementation would be immaterial to a ban. The ban (or more likely first, warrant requirement similar to cell data) would be on the tracking database, not the details of how the tracking was accomplished.
- ErroneousBosh 11mo ago> All cars have 4 unique serial numbers broadcast via radio at all times via the TPMS system. Mine doesn't.
- calvinmorrison 11mo agodo you have some sort of indirect tire pressure checking like wheel speed?
- ErroneousBosh 11mo agoNo, I have a tyre pressure gauge. Every so often I check the tyre pressures and maybe stick a bit more in if it needs it. Some VWs used to use wheel speed, though, which was fun because they added tyre pressure checking with a software upgrade. Not terribly accurate, but enough to tell you if one was low.
- jeroenhd 11mo agoTPMS doesn't need to be unencrypted like that, although many car manufacturers do like to save a buck. If you get a car old enough, you won't need to worry about TPMS (but that car will not have been tested against recent crash test scenarios).
- calvinmorrison 11mo agoTPMS is over the air, each sesnor has a 32 bit unique ID. you have 4 per car... its easy to identify
- jeroenhd 11mo agoDepends on the TPMS implementation to be honest. Most of the UHF ones are impossible to receive unless you're using some optimally placed/pretty powerful equipment. Even then, the protocol is entirely up to the vendor, as long as the system is reliable. My car is old enough that it doesn't have TPMS sensors but I have looked into third party ones. It looks like there's all kinds of systems, from custom UHF to Bluetooth LE. No idea what your car uses.
- fh973 11mo agoChecked how to receive those with SDR. Turns out they are very low power and you need to basically touch the tire. Also the transmit in minute intervals. Bit exactly a a smoking gun in terms of mass surveillance.
- EvanAnderson 11mo agoI have an RTL-SDR rig with the stock tiny omni antenna in a second story of a building adjacent a public parking lot. I'm using rtl433 and I am able to reliably pick up TPMS from the lot. I've never done any testing to see what the metes and bounds of my reception are, but it's definitely not touching the tire. My rig is at least 30 feet away from the closest parking spot.