Dimension Security in SSAS

A nice video on how to implement dimension security in SSAS

http://channel9.msdn.com/posts/Philo589/Dimension-Security-in-SQL-Server-Analysis-Services/

An excellent tool to troubleshoot whether Kerberos authentication is properly configured or not

If you are facing problems while configuring kerberos delegation in your environment then use the below link to troubleshoot the problems.

http://blogs.iis.net/brian-murphy-booth/archive/2007/03/09/delegconfig-delegation-configuration-reporting-tool.aspx