Continuing a bestselling tradition, An Introduction to Cryptography, Second Edition features all of the requisite background material on number theory and algorithmic complexity, includes a historical look at the field, and offers updated and expanded exercise sets. In addition to updates throughout the text, this edition includes two new chapters on current and future applications that cover topics such as electronic mail, Internet security, protocol layers and SSL, firewalls, client-server model and cookies, network security, wireless security, smart cards, and biometrics. The book also provides additional information on cryptanalysis and primality testing as well as appendices on DES and primitive roots.

第二版延续了畅销书《密码学导论》的传统，提供了有关数论和算法复杂性的所有必要背景材料，包括对该领域的历史回顾，并提供了更新和扩展的练习集。除了全文的更新外，本版还包括两个关于当前和未来应用程序的新章节，涵盖电子邮件、互联网安全、协议层和SSL、防火墙、客户端服务器模型和cookie、网络安全、无线安全、智能卡和生物识别等主题。这本书还提供了关于密码分析和素性测试的附加信息，以及关于DES和原始根的附录。