Baby, You Can Drive My Car

So somebody has figured out how to hack into cars' computers. “We demonstrate the ability to adversarially control a wide range of automotive functions and completely ignore driver input — including disabling the brakes, selectively braking individual wheels on demand, stopping the engine, and so on.” How would you like to be driving down a winding road on the coast of California, and find that your brakes are being disabled by a hacker in Bulgaria?