Apple Insider reports Apple filed a patent for a new user identification method that can recognize you through a picture, the sound of your voice or even your heartbeat.
"The photograph, recording, or heartbeat can be compared, respectively, to a photograph, recording or heartbeat of authorized users of the electronic device to determine whether they match," the application reads. "If they do not match, the current user can be detected as an unauthorized user."
If an unauthorized user were to attempt to access an iPhone or another device, the owner of the handset could be notified in a variety of manners, including a phone call, text message or e-mail. It could even send the owner -- or the police -- a picture of the unauthorized user, or other information specific to the potential thief, such as the current location.