Computer security issues such as viruses and hacking are increasingly making headlines. This broad look at the field of computer security is aimed at professionals looking for a thorough overview of issues surrounding large computer systems in the context of network computing, wide area networks, and computers linked to the Internet and World Wide Web. Included are details concerning the underlying principles, algorithms, and concepts that are central to the maintenance of secure everyday computing. The threats to computers in networked environments or connected to the Internet are listed and analyzed. Daily events such as privacy and integrity attacks, traffic analysis, and denial of service are explored.