Patent ID: 7552330
Filing Date: 2009-06-23
Classification: G06F

Abstract:
1. A multi-step mutual authentication system between a user and a system in which an electronic apparatus at a system management side and a terminal device at the user side are connected via a communication path and mutually authenticate a user and the electronic apparatus at the system management side as a target of access by using the system authentication information from a recording medium that is incorporated in the electronic apparatus at the system side and the personal authentication information from a personal input operation of the terminal device operated by the user, wherein two sets of a plurality of data for authentication are registered on the server, said two sets of a plurality of data consist of images, one of the sets being plural images for personal authentication indicating personal authentication information of the user, and the other set being plural images for server authentication indicating system authentication information, and the authentication at the server side using the plural images for the server authentication is performed one by one of said plural images for server authentication and then the authentication at the user side using the plural images for the personal authentication of the user is performed one by one of said plural images for personal authentication after each one of said plural images for server authentication is performed.