If you?re charged with maintaining the security of e-commerce sites, you need this unique book that provides an in-depth understanding of basic security problems and relevant solutions, while helping you implement today?s most advanced security technologies. From designing secure Web, e-commerce, and mobile commerce applications? to securing your internal network? to providing secure employee/user authentication, this cutting-edge book is flexibly structured to give you a comprehensive overview or to help you quickly pinpoint topics of immediate concern. Included are sections on basic security mechanisms, the specific requirements of electronic payment systems, communication security, and Web- and Java-related security issues. A full section is devoted to the security aspects of code and customer mobility, specifically mobile agents, mobile devices, and smart cards. Over 70 illustrations help clarify important points.