WSE 2.0 - What's New and Different in WSE 2.0?
Web Services Enhancements for Microsoft .NET version 2.0 includes a number of enhancements over earlier versions of WSE like:
WS-Trust and Security Context Tokens
Kerberos Security Tokens
Role-based Security Using Security Tokens
Signing and Encrypting Security Tokens
SOAP MessagingXML Security Token Support
To read more on WSE 2.0 Enhancement features go to -> http://msdn.microsoft.com/webservices/building/wse/WhatsNew/
a blog on Technology of Microsoft & much more..