Researchers from the University of Washington and the University of California, San Diego did an experiment to see what could be learned from just the information many cars are already recording. The result was that the way people drove was as identifiable as a fingerprint. […] When it was given data from all 16 sensors for the whole drive, the match was made 100 percent of the time. When it was given data from five sensors, three sensors, and even just the brake pedal, the match was made 100 percent of the time.
On just 15 minutes of data and all 16 sensors, the match was made 100 percent of the time. Just the brake pedal was 87 percent accurate.
This research reveals just how much data your car is actually collecting—and that turning over all that data through apps or insurance company dongles may be revealing more about yourself than you realize. Tesla, with its auto-uploading feature, probably knows a lot about its drivers.