| 摘要 |
PROBLEM TO BE SOLVED: To prevent illegal access to a server with high security strength. SOLUTION: User authentication information from a client 10 is collated with user authentication information registered in a user authentication table 22 by a user authenticating processing part 21 of a server 20, and when it is matched, new user authentication information is generated by user identification information and a random number from a random number generating part 23, and transmitted to the client. Corresponding to the request of user authentication from a user or server, a user authentication request part 11 of the client acquires the user authentication information from a user authentication information storage part 12 and transmits it to the server, and user authentication information from the server is received and stored in the user authentication information storage part. |
