本书旨在从应用的观点来介绍计算机安全的一般原则。通过本书，读者能熟悉常见的网络攻击，包括病毒、蠕虫、密码破解、按键记录器、拒绝服务、DNS缓存中毒、端口扫描、欺骗和网络钓鱼等，掌握与计算机和网络脆弱性相关的鉴别和防御技术，以及用于检测和修复受感染系统的方法，学习如加密、数字签名、加密协议和访问控制模型等安全系统的基本要素，同时，还将学习如锁、手机、ATM机和信用卡等相关常用物品的安全原则。 本书重点介绍的不是有关安全的数学与计算知识，而是站在计算机安全的系统、技术、管理和策略的角度，为读者提供计算机安全的基本概念、计算机面临的威胁以及相应的对策，是高等学校本科生“计算机安全”课程的理想教材。

Preface This book is intended to provide an introduction to general principles of provide an introduction to general principles of .. computer security from an applied viewpoint. Readers of this book will l y trom an applied viewpoint. Readers of this book will learn about common cVberattacks. including viruses. worms, password j, Including viruses, worms, password crackers, keystroke loggers, denial-of-service, DNS cache poisoning, port . . r. 1 1. 1. al. 1 1 1 1.. 1. scanning sDoofing and Dhishing TheV will learn about techniQues for b, opoofing, and phishing. They will learn about techniques for identifying and defending against vulnerabilities in machines and netying and d...