as we’ve long suspected, the computers in today’s cars can be hijacked wirelessly by feeding specially crafted packets of data into their networks. There’s often no need for physical contact; no leaving of evidence lying around after getting your hands dirty.

This means, depending on the circumstances, the software running in your dashboard can be forced to unlock doors, or become infected with malware, and records on where you’ve have been and how fast you were going may be obtained. The lack of encryption in various models means sniffed packets may be readable.

Key systems to start up engines, the electronics connecting up vital things like the steering wheel and brakes, and stuff on the CAN bus, tend to be isolated and secure, we’re told.

http://www.theregister.co.uk/2015/02/09/car_security_senator_report/