The IBM researcher

Why buying used cars could put your safety at risk

The IBM researcher leading X-Force Red, the firm's security testing group, wasn't researching car security when he discovered a major privacy issue. He simply sold his car.

"The car is really smart, but it's not smart enough to know who its owner is, so it's not smart enough to know it's been resold," Henderson told CNNTech. "There's nothing on the dashboard that tells you 'the following people have access to the car.'"