Through the use of examples, this volume defines a myriad of security vulnerabilities and their resultant threats. It details how to do a security requirement analysis and outlines the security development lifecycle. The authors examine security architectures and threat countermeasures for UNIX, .NET, Java, mobile, and Web environments, and they explore the security of telecommunications and other distributed services through Service Oriented Architecture (SOA). The book employs a versatile multi-platform approach which allows users to seamlessly integrate the material into their own programming paradigm regardless of their individual programming backgrounds. The text also provides real-world code snippets for experimentation.