The technology is known as Bodyprint, and was revealed by a blog post on the Yahoo Labs website. Bodyprint makes use of a smartphone’s capacitive touchscreen to scan your ear when you press your phone against it. An image is then generated which is used to identify the user and unlock the phone, writes Steven Tweedie for Business Insider.
Ears and various other body parts used to unlock devices
Researchers at Yahoo Labs have also been able to make Bodyprint work using other parts of the human body such as fists, knuckles, fingers and palms, using the touchscreen to create an image in each case. Although other body parts can be used, it would appear that the technology is best suited to use with the ear, seeing as people hold their phone there when they talk.