A：Before visiting a service provider or an application in CARSI, user identity authentication is required. There are two workflows to get this.

(1)User authentication before using the application

The user should visit CARSI directory service http://ds.carsi.edu.cn/ first and select his home institution. Then, he should type in the username and password on his home IdP login page. After successfully authenticated, the user should types in or select the application url in the same browser and the page will be redirected to the service transparently without any further authentication.

(2)Using Application before user authentication

Users should first visit a CARSI SP application, for example http://www.ieee.org/. Following the guidance on the application, the user can select CERNET CARSI Identity Federation and visits http://ds.carsi.edu.cn/ or his home institution's login page. The user types in his campus-network username and password. After successful authentication, the page will be redirected to the application webpage the user first visited.

A：The aim of CARSI is to provide services for higher education, scientific research, and university administration. At present, the resources available are mainly electronic resources purchased by the library, and other information applications of campus are gradually introduced, such as genuine software, high-performance computing, patents, industry data, portals to provide information about postgraduate entrance examination and certificate examination, etc. The CARSI project team welcomes teachers and students to send suggestions to carsi(at)pku.edu.cn about other high-quality resources. You can find the full list of CARSI resources on https://www.carsi.edu.cn/SPlist.html. If your school has joined CARSI, you can achieve "one-stop" access to resources by logging in https://ds.carsi.edu.cn/.

A：You can contact your university network management department, such as the information office, information network center, etc. The network management department shall submit the application for joining CARSI.

From ver 3.0 upward, IdP has been equipped with user personal privacy protection that will notify the user what personal information will be sent to the service providers and stop sending data without permissions. Users can choose what information will be sent and to whom (SP or applications) the data information be sent.

A：Yes. Sites of CARSI, such as https://www.carsi.edu.cn/, https://ds.carsi.edu.cn/, https://mgmt.carsi.edu.cn/, etc. can operate in IPv6. The rapid IdP installation package provided by the PKU team supports IPv6. Please inquire universities and vendors for the IPv6 supportability of their systems.