摘要:
There is provided a portable electronic device limiting an allowable operating range thereof for security reason and a security system using the portable electronic device. A security system 10 includes a mobile-phone 100 and an item 101. The mobile-phone 100 has functions of a registering unit 501, a judging unit 503 and an operating range determining unit 504, etc. The registering unit 501 registers item information to specify the item in advance. The judging unit 503 judges, based on the presence or absence of a signal from the item, whether an item specified by the registered item information can communicate with the mobile-phone or not when an event is generated in the mobile-phone. When it is judged that the communication is possible, the operating range determining unit 504 allows a normal operation of the mobile-phone in response to an external access, and when it is judged that the communication is impossible, the operating range determining unit 504 limits the operating range of the portable electronic device in response to an external access.
摘要:
With a shared index information file in a file sharing index manager, a distributed file system controls access to files based on access right obtained from the index information. Even when a host terminal operated by a user does not have directory information required, that host terminal may obtain an access right from the file sharing index manager without making access to the host terminals. The host terminals perform local management via file sharing managers to minimize accesses to the host terminals which are required until processing is completed.