| 摘要 |
PROBLEM TO BE SOLVED: To prevent leakage of information.SOLUTION: A terminal device 200 transmits terminal authentication information 211 to a server device 300. The server device 300 receives the terminal authentication information 211, to authenticate the terminal device 200 by use of the terminal authentication information 211. The server device 300 transmits server authentication information 311 to the terminal device 200. The terminal device 200 receives the server authentication information 311, to authenticate the server device 300 by use of the server authentication information 311. When both the terminal device 200 and server device 300 are successfully authenticated, the terminal device 200 and the server device 300 start communicating with each other. When one of the terminal device 200 and the server device 300 cannot be authenticated, the terminal device 200 executes erasure processing of erasing the terminal authentication information 211 from a storage section.SELECTED DRAWING: Figure 1 |
