This book provides explicit hacks, tutorials, penetration tests, and demonstrations step-by-step for security professionals and Web application developers to defend their most vulnerable applications. This book defines Web application security, why should be addressed early in the lifecycle in development and quality assurance, and how it differs from other types of Internet security. * Yankee Group estimates the market for security products Web applications and services will grow to $ 1740000000 in 2007 from $ 140 million in 2002 * The writer Matt Fisher is a highly sought after speaker who regularly give presentations at the conference's leading Web application including: Black Hat, TechnoSecurity, West CanSec, Shmoo Con, Information Security, RSA Conference, and more * Companion Web site will have a download code and scripts presented in this book