Computer Systems Engineering Co., Ltd.

Tsugune Saito

Shigetomo Tamai

Yukiya Ueda

Disclosed is an off-line user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An off-line authentication client pre-stores a plurality of pattern element sequences each adapted to form a presentation pattern, and a plurality of verification codes created by applying a one-time-password derivation rule to the respective presentation patterns and subjecting the obtained results to a one-way function algorithm. A presentation pattern is created using one selected from the stored pattern element sequences, and presented to a user. A one-time password entered from the user is verified based on a corresponding verification code to perform user authentication. The present invention provides an off-line matrix authentication scheme with enhanced security.

System, method and program for off-line user authentication

Disclosed is an off-line user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An off-line authentication client pre-stores a plurality of pattern element sequences each adapted to form a presentation pattern, and a plurality of verification codes created by applying a one-time-password derivation rule to the respective presentation patterns and subjecting the obtained results to a one-way function algorism. A presentation pattern is created using one selected from the stored pattern element sequences, and presented to a user. A one-time password entered from the user is verified based on a corresponding verification code to perform user authentication. The present invention provides an off-line matrix authentication scheme with enhanced security.

Disclosed is a user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password of the user to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An authentication server is operable to generate a pattern seed value adapted to be combined with a user ID so as to allow a presentation pattern to be uniquely determined, and transmit the generated pattern seed value to an authentication-requesting client. The authentication-requesting client is operable to display a presentation pattern created based on an entered user ID and the received pattern seed value and in accordance with a given pattern-element-sequence creation rule, so as to allow the user to enter therein a one-time password, and transmit the entered one-time password to the authentication server. The authentication server is operable to duplicate the presentation pattern so as to create a verification code, and compare between the received one-time password and the created verification code, so as to carry out user authentication. The present invention provides a matrix authentication scheme capable of reducing the risk of password leakage.

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Tokyo, Japan

Tsugune Saito