Kerberos

Kerberos FAQ: http://www.cmf.nrl.navy.mil/CCS/people/kenh/kerberos-faq.html

Kerberos für Apache Webserver

Single Sign-On: http://www.onlamp.com/pub/a/onlamp/2003/09/11/kerberos.html

Kerberos Module für Apache: http://modauthkerb.sourceforge.net/

Mozilla Kerberos Plugin: http://negotiateauth.mozdev.org/