Patent ID: 8856906

Claim:
An authentication processing method executed in a system having a plurality of groups each having a service system, an authentication server for the service system and a cookie setting service, the method comprising: operating a first cookie setting service for setting a first cookie in a user terminal in response to a first cookie setting request from the user terminal, the first cookie indicating use of a first authentication server belonging to a first group which is the same group as the first cookie setting service, wherein the first cookie setting service sets the first cookie in the user terminal and transmits information including a second cookie setting request to the user terminal when a list includes information with regard to a second group other than the first group, without transmitting the second cookie setting request to the user terminal when the list does not include information with regard to the second group; and operating a second cookie setting service for setting a second cookie in the user terminal when the second cookie setting service receives the second cookie setting request from the first cookie setting service via the user terminal, the second cookie indicating use of a second authentication server belonging to the second group which is the same group as the second cookie setting service.