David Litchfield specializes in searching for new threats to database systems and web applications. He has lectured to both British and U.S. government security agencies on database security and is a regular speaker at the Blackhat Security Briefings. He is a co-author of "The Database Hacker's Handbook", "The Shellcoder's Handbook", "SQL Server Security", and "Special Ops". In his spare time he is the Managing Director of Next Generation Security Software Ltd.