PURPOSE: To eliminate the need to provide definition for protection and to make handling easy irrespective of increasing secrecy protection by using adverse definition when a user protects secrecy.

CONSTITUTION: When a command is inputted to a user terminal protection detecting part 1, the detecting part 1 detects user protection and terinal device protection. When either one of the protection is detected, an adverse definition recognition part 2 is requested to recognize it. The recognition part 2 recognizes the 2nd attribute of the user protection, i.e. adverse definition. When normal definition is recognized, normal definition processing is performed by a normal recognition part 3. When the adverse recognition is recognized, the protection subordinates of the adverse definition are checked and coupling processing is performed by a coupling processing part 5 in case of a general closed resource or open resource. In case of the open resource of the adverse definition, i.e. general closed resource, the right to access or not is checked, and when not, error processing is performed by an error processing part 4; when there is the right to access, the coupling processing is performed by the processing part 5.