The Sound of your Skull could soon replace your Password – seriously
Geraldine
Scientists in Germany are working on a system that can identify the way your skull vibrates in reaction to an ultrasonic signal, because it could be just as unique as your fingerprint. It could eventually be used to prove you are who you say you are when logging into your email, or trying to gain access to the Pentagon.
From our very good friends over at sciencealert.com