Security is an area of increasing and grave concern to programmers. Software developers today need to worry about security as never before. They need clear guidance on safe coding practices, and that's exactly what this book delivers. This is not a book that goes deep into theory, or that rants on about the politics of security. Instead, it clearly and simply lays out the most common threats that programmers need to defend against. The book then shows programmers how to make their defense. The book takes a broad focus, ranging over SQL injection, worms and buffer overflows, password security, and more. The lead author is behind the Stanford Center for Professional Development Computer Security Certification. The book is written to appeal to all programmers, not just those using a particular language. It introduces programmers to the entire gamut of security threats that they might face, and sets those programmers on the path towards successfully defending against those threats.