| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an authentication method convenient for an authentication object while maintaining the security of authentication processing. <P>SOLUTION: In the authentication method for authenticating a member of a group by use of registration information registering a plurality of pieces of display information 701 to be displayed to a user and sharing information commonly associable by each member of the group according to the display information 701, a predetermined number of pieces of registration information are selected from a plurality of pieces of registered registration information, display information 701 contained in the selected registration information is displayed on an authentication screen 700, it is determined whether user input information inputted through a predetermined input means by the user by association from the displayed display information is identical with the sharing information contained in the selected registration information or not, and when the identity is determined, the user is determined to be a member of the group. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
