| 摘要 |
PThe present invention provided is a matrix authentication system for two- factor authentication in which the risk of authentication information leakage is reduced. A two factor user authentication system using as a password a rule for generating a one-time password by applying the rule to a factorn element which is included at a specific position in a presentation pattern included in a presentation pattern, and further using the password to authenticate identification information of a client used by a user. An wherein, an authentication server dispatches generates a pattern seed value which is a value that combined with client identification information uniquely determines a presentation pattern, and sends the pattern seed value to an authentication request client. ;T and the authentication request client generates a presentation pattern on the basis of the client identification information acquired from the authentication server and the received pattern seed value received therefrom, displays the presentation pattern, and receives from the user the input of a one-time password based on the presentation pattern. |
