Patent ID: 8362874

Claim:
A bio-presence based keyguard mechanism, comprising: a set of key sensors associated with keys of a device keypad, wherein each of the key sensors is one or more of a pressure sensor or displacement sensor for detecting engagement of the device keypad through pressure or displacement sensing; one or more bio-presence sensors associated with one or more of the keys of the device keypad and configured to register a condition associated with human touch on the device keypad; and a processor for processing signals generated by the key sensors and the one or more bio-presence sensors to determine that changing from a locked state to an unlocked state for the device keypad is warranted, wherein the unlocked state is warranted when (1) a key sensor detects an engagement of the device keypad, (2) a bio-presence sensor detects the same engagement of the device keypad, and (3) a time period measured from when the engagement of the device keypad is detected by the key sensor, to when the same engagement of the device keypad is detected by the bio-presence sensor, is less than an allotted time period.