An input device for an electronic system includes: an input surface, configured to provide an interface for determining positional information for an input object in a sensing region of the input device; a biometric sensor, configured to determine biometric information about a user; and a processing system, configured to: in response to placement of a valid biometric object on the biometric sensor, enable access to a secure object of the electronic system while the valid biometric object is maintained on the biometric sensor; and disable access to the secure object of the electronic system in response to removal of the valid biometric object from the biometric sensor.