TERMINAL APPARATUS, DEVICE, UNAUTHORIZED USE PREVENTING SYSTEM, UNAUTHORIZED USE PREVENTING METHOD, AND PROGRAM

摘要

To provide the safety of preventing the illicit use of others by using a state as to whether or not the essential function of the device is not in use in locking the terminal to prohibit the use. A user terminal 10 makes a determination whether or not a device unit 20 is in a use state, the terminal unit 10 is locked after a predetermined second time from a last operation signal from the device unit 20, if the device unit 20 is not in use, irrespective of the network connection.