Open doors and locks with your skin

Unlocking cars and activating devices securely could soon be a matter of simply touching them, thanks to a communications system that transmits data across the skin.

"We are using the body as a signal transmitter," says CEO Peter Rosenbeck. "You simply have a transmitter, a person and a receiver."

Rosenbeck says the system operates at just 30 nanoamperes, making it entirely safe for people to use. The code transmitted by the electric signal allows cars to be unlocked, doors opened or other devices started.

You do need to carry a credit card-sized object in your pocket. Here is the full story.