Digital identity in service implementation & SOA world
some excellent work describing how Microsoft technology stacks deals with identity management issues (mainly Authentication & Authorization) by David Chappell additionally he thoroughly explains the deferences between “domain based authentication” and “claim based authentication”
If you are developing services, or planning to as matter of fact if you are developing on Microsoft technologies in any way this is a must read document
The document is here (http://msdn2.microsoft.com/en-us/library/bb882216.aspx) his own comments on it is here (http://www.davidchappell.com/blog/2007/10/digital-identity-for-net-applications.html)
Kal