| 摘要 |
PROBLEM TO BE SOLVED: To limit a user and to secure high security by making a balance /user management center allow account settlement when the final history information of a user file and the final history information of a data base are matching. SOLUTION: At the time of receiving a user authentication message and recognizing that a user ID and an electronic signature are normal, the management device 41 of a management center 14 confirms the history information of the received message by reading the final history information from a file corresponding to the user inside the data base 42 and comparing it with the received message. Then, in the case that a confirmed result is normal, the management device 41 allows the account settlement accompanying various electronic business transactions by the user. Thereafter, at the time of confirming that the user is provided with a balance at the point of time of the account settlement, the management device 41 executes the electronic signature to the new balance information, records it in the file inside the data base 42 as the final history information and sends it through a network 13 to a pertinent terminal 11A. As a result, the history information of the user file is updated. |
