Vittorio Bertocci is a Senior Technical Evangelist in DPE and a key member of the extended engineering team building Windows Identity Foundation. He is co-author of A Guide to Claims-Based Identity and Access Control (Microsoft Press, 2010), Understanding Windows Cardspace (Addison-Wesley, 2008) and a prominent authority/blogger on Azure, "Geneva" (the code name for Windows Identity Foundation), .NET development, and related topics at www.cloudidentity.net.
"Frankly, you will be hard-pressed to find a more complete and technically consumable treatment of WIF and the problems faced by applications and platforms needing identity functions. If you look for one book to cover the majority of identity and claims-based processes this is the book."
--Rick Kingslan, Musings of a constant geek
"I recommend this book to all ASP.NET development teams."
--Clive Chinery, Tatworth