| Single sign-on (SSO) / Kerberos authentication | |
Authentication for applications served by the GAS utilizes the Kerberos protocol. Kerberos is a secure method for authenticating a request for a service in a computer network.
A free implementation of this protocol is available from the Massachusetts Institute of Technology (http://web.mit.edu/Kerberos). Kerberos is available in many commercial products as well.
Active Directory provides central authentication and authorization services for Windows-based computers. Kerberos is used by default for authentication in Active Directory.