ABOUT THE SPEAKER Michael Stiefel, principal of Reliable Software, Inc., is a consultant on software architecture and development and the alignment of information technology with business goals. He is a coauthor of Application Development Using C# and .NET (Prentice-Hall). SESSION DESCRIPTION Businesses have started to use service-oriented architecture (SOA) to develop high-value and flexible corporate software applications. These applications are typically developed as Web services. Securing these Web services is critical for them to be widely used by businesses and customers. Traditional security protocols are often inadequate for these applications, so the security community has developed the WS-Security specification. Microsoft has developed the WSE 2.0 technology to make using WS-Security much easier. This session will explain how to use Microsoft's WSE 2.0 technology to secure applications based on an SOA or a Web service.