This updated edition will help IT managers and assets protection professionals to assure the protection and availability of vital digital information and related information systems assets. It contains major updates and three new chapters. The book uniquely bridges the gap between information security, information systems security and information warfare. It re-examines why organizations need to take information assurance seriously. 19 Tables, black and white; 35 Illustrations, black and white; XVI, 264 p. 35 illus.