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kerberos - introduction to the Kerberos system
This is done with a Kerberos server acting as a trusted third party, keeping a database with secret keys for all users and services (collectively called principals )
Each principal belongs to exactly one realm which is the administrative domain in Kerberos. A realm usually corresponds to an organisation, and the realm should normally be derived from that organisation's domain name. A realm is served by one or more Kerberos servers.
The authentication process involves exchange of `tickets' and `authenticators' which together prove the principal's identity.
When you login to the Kerberos system, either through the normal system login or with the kinit(1) program, you acquire a ticket granting ticket which allows you to get new tickets for other services, such as telnet or ftp without giving your password.
For more information on how Kerberos works, and other general Kerberos questions see the Kerberos FAQ at http://www.nrl.navy.mil/CCS/people/kenh/kerberos-faq.html
For setup instructions see the Heimdal Texinfo manual.
The problems with version 4 are that it has many limitations, the code was not too well written (since it had been developed over a long time), and it has a number of known security problems. To resolve many of these issues work on version five started, and resulted in IETF RFC1510 in 1993. Since then much work has been put into the further development, and a new RFC will hopefully appear soon.
This manual manual page is part of the Heimdal Kerberos 5 distribution, which has been in development at the Royal Institute of Technology in Stockholm, Sweden, since about 1997.
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