About the Authors xiii Author Ido Dubrawsky (CISSP, Security , CCNA) is the Chief Security Advisor for Microsoft's Communication Sector Americas division. His responsibilities include providing subject matter expertise on a wide range of technologies with customers as well as discussions on policy, regulatory concerns, and gov- ernance. Prior to working at Microsoft, Ido was the acting Security Consulting Practice Lead and a Senior Security Consultant at AT&T's Callisma subsidiary where he was tasked with helping to rebuild the practice. Ido has held a wide range of previous roles, including Network Security Architect for Cisco Systems, Inc. on the SAFE Architecture Team. He has worked in the systems and network administration field for almost 20 years in a variety of environments from gov-