Microsoft WCF Security Guidance is a Patterns and Practices project to improve web services security, especially for WCF services. It contains proven practices for building secure, distributed applications with WCF. With end-to-end application scenarios, it shows you how to design and implement authentication and authorization in WCF. You can learn how to improve the security of your WCF services through prescriptive guidance including guidelines, Q&A, practices at a glance, and systematic how-tos. It is a collaborative effort between Patterns and Practices, WCF team members, and industry experts. The guidance document can be downloaded from http://wcfsecurityguide.codeplex.com/.