| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize a low-cost cooperation service in which a plurality of Web services are cooperated. <P>SOLUTION: An authentication server 4 of an authentication cooperation system generates secret authentication information of each piece of authentication information by performing concealing arithmetic processing, using the authentication information handled by authentication processing as an input. An authentication information verification server 3 extracts a plurality of pieces of authentication information in which diversion of a combination occurs, by acquiring a plurality of combination sets of the secret authentication information generated by the authentication server 4 and a user ID for uniquely specifying a user of a user terminal 8 using the authentication information which is a generation source of the secret authentication information and mutually referencing them. An authentication cooperation server 2 approves a service if a state of user authentication as an authentication result constituting the state of user authentication satisfies a policy, the state after excluding an authentication result in which the diversion of the authentication information has occurred. <P>COPYRIGHT: (C)2013,JPO&INPIT |
