An electronic device is provided that includes a processor, an output
device connected to the processor for issuing a stimulus to a user of the
electronic device, and at least one input device connected to the
processor and responsive to user interaction. The electronic device also
includes a device lock module associated with the processor for
implementing restrictions on user access to the electronic device if user
interaction is not detected within a predetermined lockout-time interval,
the device lock module being configured for resetting the lockout-time
interval into a shorter value if a user stimulus is issued by the output
device.