| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of providing a service corresponding to information before single sign-on (SSO) for a service user after the SSO.SOLUTION: An authentication system comprises an IdP server, an SP server, an SSO authentication database, and an information holding unit. When the SSP server is accessed according to SSO by a user terminal, it stores communication session information before SSO on the user terminal as prior SSO information in the information holding unit, and redirects the user terminal to the IdP server. The IdP server uses authentication information input by the user terminal to refer to the SSO authentication database and performs SSO authentication, and redirects the user terminal to the SP server if the SSO authentication is successful. After the success of SSO authentication, the SP server obtains the prior SSO information from the information holding unit, and provides the user terminal with a service corresponding to the contents of the prior SSO information.SELECTED DRAWING: Figure 1 |
