via hexview.comNew technologies always come with privacy issues.
Tire Pressure Monitoring Systems (TPMS) is one of those technologies.
What is TPMS?
TPMS lets on-board vehicle computers measure air pressure in the tires.
How does TPMS work?
In a typical TPMS, each wheel of the vehicle contains a device (TPMS sensor) - usually attached to the inflation valve - that measures air pressure and, optionally, temperature, vehicle state (moving or not), and the health of the sensor's battery. Each sensor transmits this information (either periodically or upon request) to the on-board computer in the vehicle. To differentiate between its own wheels and wheels of the vehicle in the next lane, each TPMS sensor contains a unique id.
TPMS transmits data that uniquely identifies your car!
Here is where privacy problems become obvious: Each wheel of the vehicle transmits a unique ID, easily readable using off-the-shelf receiver. Although the transmitter’s power is very low, the signal is still readable from a fair distance using a good directional antenna.
Why is this a problem?
If you live in the United States, chances are, you have heard about the “traffic-improving” ideas where transportation authorities looked for the possibility to track all vehicles in nearly real time in order to issue speeding tickets or impose mileage-adjusted taxes... Guess what? With minor limitations, TPMS can be used for the very purpose of tracking your vehicle in real time with no substantial investments! TPMS can also be used to measure the speed of your vehicle... (remember) car manufacturers know serial numbers of every part in your vehicle, including unique IDs of TPMS sensors.
("Your ticket is in the mail.")
Now, no article is complete unless it mentions terrorists...
It is now super easy to blow up someone's car. There's no need to fix the explosive to the vehicle. No more wires and buttons. No human factor. A high-school kid with passion for electronics can assemble a device that will trigger the detonator when the right vehicle passes by. (more)
