WebAuth is an authentication system for web pages and web applications. The first time a user attempts to access a web page protected by WebAuth, they will be sent to a central login server (weblogin.stanford.edu at Stanford) and prompted to authenticate.
Normally, they will be asked for a username and password, although other authentication methods are possible. Once the user has logged in, the weblogin server will send their encrypted identity back to the original web page they were trying to access. Their identity will also be stored in a cookie set by the weblogin server and they will not need to authenticate again until their credentials expire, even if they visit multiple protected web sites.
WebAuth works with any browser that supports cookies, requires no agents or other software installed on the client web browser systems, and works with an existing Kerberos v5 authentication realm. It can also be used as the SSO provider for a Shibboleth IdP and supports SPNEGO authentication as well as username/password over TLS/SSL.