Bestselling author Bruce Schneier offers his expert guidance on achieving security on a networkInternationally recognized computer security expert Bruce Schneier offers a practical, straightforward guide to achieving security throughout computer networks. Schneier uses his extensive field experience with his own clients to dispel the myths that often mislead IT managers as they try to build secure systems. This practical guide provides readers with a better understanding of why protecting information is harder in the digital world, what they need to know to protect digital information.;Introduction to the Paperback Edition; Preface; Chapter 1: Introduction; SYSTEMS; SYSTEMS AND SECURITY; Part 1: The Landscape; Chapter 2: Digital Threats; THE UNCHANGING NATURE OF ATTACKS; THE CHANGING NATURE OF ATTACKS; PROACTION VS. REACTION; Chapter 3: Attacks; CRIMINAL ATTACKS; PRIVACY VIOLATIONS; PUBLICITY ATTACKS; LEGAL ATTACKS; Chapter 4: Adversaries; HACKERS; LONE CRIMINALS; MALICIOUS INSIDERS; INDUSTRIAL ESPIONAGE; PRESS; ORGANIZED CRIME; POLICE; TERRORISTS; NATIONAL INTELLIGENCE ORGANIZATIONS; INFOWARRIORS; Chapter 5: Security Needs; PRIVACY; MULTILEVEL SECURITY; ANONYMITY.