Certificates are your key to secure web services at MIT, (such as Benefits, Request Tracker, SAPweb, and WebSIS) and the preferred way to access MIT servers.
If you don't have a certificate installed on this machine, you may login using your MIT username (the 8 characters before your @mit.edu email address) and your Kerberos password.
Using your Kerberos tickets to authenticate to MIT Touchstone requires correct browser configuration. This option is useful for Athena and WIN.MIT.EDU users.