| 摘要 |
PROBLEM TO BE SOLVED: To improve convenience of users and service providers, and to easily change an authentication method.SOLUTION: An authentication system according to an embodiment comprises: a service provider device; an IDaaS business administrator device; and an authentication proxy device. On the basis of a user ID transmitted from a user terminal and a SSO request therefrom, the authentication proxy device, which has authentication account information associated with SSO account information including a SSO account identifier matching the user ID via a second cooperation ID, is configured to execute authentication processing of a user. When a result of the authentication processing is succeeded, the IDssS business administrator device having the SSO account information including the SSO account information matching the user ID is configured to allow for SSO authentication to a service of the service account identifier included in service account information associated with the SSO account information via a first cooperation ID. The service providing device is configured to transmit information on the service to the user terminal. |
