As of July 1, 2018, CSAIL no longer uses client-side web certificates for authentication to web applications and sites. This page is the new login page for CSAIL's OIDC (OpenID Connect) service. To log in, you can just type in your CSAIL username and password in the first panel on this screen (easy). You can also use existing CSAIL Kerberos tickets (advanced). You can find out more at the TIG OIDC introduction. As always, if you get stuck and need help, please send email to email@example.com.