| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication system including a mobile terminal, capable of preventing information leakage if the mobile terminal is lost, and capable of regenerating secret data having been stored ever, without losing the new created and updated secret data. <P>SOLUTION: A mobile terminal 1 includes connection state decision means 6 for detecting a channel connection state to a server 2. When the channel connection state indicates a broadband connection, the mobile terminal 1 directly reads out or stores data from/to data storage means 23 provided in the server 2. When the channel connection state indicates a narrow band connection, the mobile terminal 1 once reads out or stores data from/to data storage means 14 provided in the terminal, and thereafter, stores the secret data updated when the operation of the mobile terminal 1 is completed or a secrecy keeping operation initiation command is generated from a user, into the data storage means 23 of the server 2, and then erases the secret data. <P>COPYRIGHT: (C)2013,JPO&INPIT |
