Centralized Control of Account Migration at Single Sign-On in Shibboleth

Single Sign-On (SSO) is adopted to use multiple services with a single log-in in the Internet. However, when a user tries to change the identity provider (IdP) which is responsible for authenticating of the user, he needs to release the binding between the log-in account on the migration-source IdP and his service account on each service provider (SP), and needs to set a new binding between the account on the migration-destination IdP and the service account on the SP. There is no common migration system to support migration using the SSO function. In this research, we especially focus on Shibboleth's function as an SSO service. And we propose a protocol to migrate accounts of a user on multiple SPs at once using an attribute provider (AP) in SSO environment. Also we implement the mechanism as an open source software using SimpleSAMLphp.