Source for a Kerberos implementation is available from MIT. The distribution includes a Kerberos server, applications which use Kerberos authentication, and libraries for use in developing applications which use Kerberos authentication. The current distribution, Version 5, also requires ISODE (the ISO Development Environment) in order to provide support for ASN.1 which is now used in the Kerberos protocol. The distribution may be installed on systems which do not provide any robust authentication mechanisms or to develop additional network services on systems which already have some robust authentication mechanism.
Two types of applications are included in the distribution: complete applications such as telnet and a POP (Post Office Protocol) server, and sample applications which may be used as templates to develop other Kerberos authenticated applications. The telnet application includes an option to encrypt all packets between the login client and server to insure confidentiality.