Single Sign on solutions and resource

Sun on document:

http://docs.sun.com/source/816-6774-10/index.html

single sign on using Kerberos:

http://java.sun.com/j2se/1.4.2/docs/guide/security/jgss/single-signon.html

 

IBM single sign on solution and implementation:

http://www.ibm.com/developerworks/web/library/wa-singlesign/

 

Open SSO:

https://opensso.dev.java.net/