Apple has filed an application to patent a new biometric ID system for the iPhone.
Technology blog Unwired View reports that the new system would use cardiac sensors, designed to identify users by analysing the pace at which their hearts beat.
The technology used by the cardiac sensors is based on the heart rate monitors used for exercise, but has been greatly enhanced.
Considering the progress made by Apple in biometric security, technology experts believe it's just a matter of time before iPhones will be able to read the mood of a user by their heart rate, and operate accordingly.
Apple's patent application reads as follows “Using the detected signals, the electronic device can identify or authenticate the user and perform an operation based on the identity of the user.”
Apple believe the cardiac sensors will usher in a new era of biometric security for mobile devices, rendering passwords, security questions and thumb scans obsolete.