| 摘要 |
PROBLEM TO BE SOLVED: To provide a usage support system capable of supporting a user to make a user available to operate a communication subject while securing security even if the user is in an off-line area.SOLUTION: When a user loses an electronic key in an off-line area incapable of network connection, the user informs an information Dus to a center 18 through a telephone, a FAX, or the like. The center 18 confirms the rightness of the user by the user information Dus, and if he or she is an authorized user, transmits an limited use electronic key 29 to the user by mailing or the like. The limited use electronic key 29 is, for instance, a key allowing driving to a dealer nearest to the user, a key allowing engine starting only at a predetermined rotational speed, a key having an expiration time or the like. |
