Kerberos

Kerberos 	 
 http://web.mit.edu/kerberos/www/ 		 Apple’s Introduction to Kerberos [Part 1 http://www.afp548.com/Articles/Panther/kerberos1.html ] and [Part 2 http://www.afp548.com/Articles/Panther/kerberos2.html ] – very useful