| 摘要 |
PROBLEM TO BE SOLVED: To attain individual certification with one-time password for which any exclusive hardware is not necessary. SOLUTION: The path of a file in which the file update history information 105 is stored is designated from a password set in a network connecting device 101, and the data of the past file update history information are preserved in a password management table 104. When a password from a remote logging-in user PC102, the data of the file update history information 105, and the data of the password management table 104 are made coincident with each other the user PC102 logs-in a server PC103 or a user PC107. Then, new file update history information 105 is loaded from a path designated by the user PC102, and the password management table 104 is updated so that a new password can be generated. Then, the user PC102 logs-out of the server PC103 or the user PC107. |
