Mike Shema is Director of Engineering for Qualys, a leading computer and network security services firm. Regarded as one of the top Web application security experts in the world today, Shema focuses on assessment and mitigation strategies for all aspects of Web application security. Previously, he was NT OBJECTives, Inc.'s Chief Security Office and Principal Consultant at Foundstone where he performed network penetration tests, Web application security assessments, and wireless network security audits. Shema is the co-author of all three previous editions of The Anti-Hacker Tool Kit and Hacking Exposed Web Applications, Second Edition.