| 摘要 |
PURPOSE: To disable the use of a stolen portable terminal by outputting a system lock request from a network to the terminal based upon information from an owner of the terminal and allowing the terminal to delete its all internal data. CONSTITUTION: An owner of a stolen radio portable terminal 11 transmits information to which the terminal ID of the terminal 11 to an information center 14 through another radio portable terminal 12 or a wired terminal 13. The center 14 transmits an ID check request command to which the terminal ID of the terminal 11 is added through a radio base station 15. When a respose is returned from the terminal 11, the center 14 transmits a system lock command to the terminal 11. Thereby the terminal 11 erases all the contents of an owner's personal data storage RAM backed up by a battery and then returns a system lock completion response to the center 14. The center 14 returns system lock completion information to the owner of the terminal 11. |
