| 摘要 |
<p>A user authentication method and a user authentication system. A password derivation pattern for each user is registered in an authentication server. When a user uses the system, the authentication server generates a presentation pattern and presents it to the user. For the presentation pattern, the user is requested to enter a password corresponding to the user’s password derivation pattern. The authentication server authenticates the entered password based on the presented presentation pattern and the user’s password derivation pattern that is registered and notifies the system, which is used by the user, of the authentication result.</p> |
