Once you start adopting service-oriented principles for your distributed applications, you are crossing a security boundary for every service call you make. Windows Communication Foundation (WCF) provides powerful facilities for implementing authorization in your services.

In the October 2008 issue of MSDN Magazine, Dominick Baier and Christian Weyer explain how to use role-based and claims-based APIs to implement robust WCF service authorization.

Don't forget to browse the sample code in our online code library.