| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a new user authentication method and a system for realizing it for effectively preventing unauthorized access of a third party to the system. <P>SOLUTION: In the user authentication method and a user authentication system, a password derivation pattern for each user is pre-registered in an authentication server, and when a user uses the system, the authentication server generates a presentation pattern and presents it to the user, the user inputs a password corresponding to the user's own password derivation pattern for the presentation pattern, the authentication server performs authentication of the input password based on the presented presentation pattern and the user's own password derivation pattern that is registered, and an authentication result is then notified to a usage target system. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
