This book offers complete coverage of all aspects of computer security, including users, software, devices, operating systems, networks, law and ethics. Reflecting rapidly evolving attacks, countermeasures and computing environments, it introduces up-to-the-minute best practices for authenticating users, preventing malicious code execution, using encryption, protecting privacy, implementing firewalls, detecting intrusions and more.Features This classic text has been thoroughly updated to reflect today’s newest technologies, standards and trendsTopics progress from simple and straightforward to complex and intricateEasy-to-read descriptions of concepts and incidentsAs of Oct, 2015, there are new, vastly improved PowerPoint slides for instructor use.