as mentioned i had incredible opportunity recently to attend conference one of the new things is identifying vehicles using wireless tpms sensors i think the work may have trickled up to enforcement and corporate workerd via uc berkelely students unsure, to fight slavery, funded by consumer data gathering venture capital all vehicles made in recent decades using the cheaper “indirect” tire pressure measurement systems constantly broadcast a tire pressure signal unique to the vehicle. occasionally the vin is retrievable but not usually, rather useful data is found via cross-correlation the sensor is small, raspberry-pi-like. they are being deployed with scrubbed PII all over. sorry i don’t have links atm. but the emissions content seemed pretty cool to me.