US 7,461,252 B2Granted

Authentication method, program for implementing the method, and storage medium storing the program

AssigneeCanon Kabushiki Kaisha

InventorHiroaki Kishimoto

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Abstract

A authentication method which can provide a card application that does not depend on the presence of an authentication information comparison system and can also improve security and simplify authentication information management. An authentication system to which the authentication method is applied is comprised of an IC card 200 having a card application 210 and a card application 220, and a terminal device 100 that can communicate with the IC card 200. The card application 210 compares authentication information inputted by a user and transmitted from the terminal device and authentication information held by itself. The card application 210 stores authentication status information according to results of the comparison. The card application 220 acquires the authentication status information from the card application 210, stored in the IC card 200.

Claims9

Dependent claims

An authentication method for an authentication system including an information recording medium storing a plurality of applications, including an authentication application holding authentication information and a plurality of terminal applications associated respectively with the plurality of applications, and at least one terminal device communicable with the information recording medium, the method comprising:

a comparison step of comparing authentication information inputted by a user and transmitted from the terminal device and the authentication information held by the authentication application, with the authentication application;
a storage step of storing authentication status information according to results of the comparison, with the authentication application;
an acquisition step of acquiring the authentication status information from the authentication application, with at least one application other than the authentication application, stored in the information recording medium;
a notification step of notifying the terminal application associated with the other application stored in the information recording medium that the authentication status information acquired from the authentication application indicates non-authentication when the acquired authentication status indicates the non-authentication;
and
a request step of requesting the terminal application associated with the authentication application to carry out user authentication, with the terminal application associated with the other application, in response to the notification.

3 more elements

Dependencies are inferred from the claim text.