This updated edition was written to help IT managers and assets protection professionals to assure the protection and availability of vital digital information and related information systems assets, and contains major updates and 3 new chapters. Bridging the gap between information security, information systems security and information warfare, it re-examines why organisations need to take information assurance seriously, and discusses the business, legal, and technical knowledge needed to secure these vital government and business assets. Key topics include: The role of the corporate security officer; Corporate cybercrime; Electronic commerce and the global marketplace; Cryptography; International standards, policies and security acts. "A refreshingly clear & wide-ranging view of Information Assurance...this book not only explains what the problems are, it also gives you clear information on how to address the issues that have been raised." (Dr. Andy Jones, Research Group Leader, BT Group Chief Technology Office UK)