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For courses in Cryptography, Computer Security, and Network Security   The Principles and Practice of Cryptography and Network Security Stallings’ Cryptography and Network Security introduces students to the compelling and evolving field of cryptography and network security. In an age of viruses and hackers, electronic eavesdropping, and electronic fraud on a global scale, security is paramount. The purpose of this book is to provide a practical survey of both the principles and practice of cryptography and network security. In the first part of the book, the basic issues to be addressed by a network security capability are explored by providing a tutorial and survey of cryptography and network security technology. The latter part of the book deals with the practice of network security: practical applications that have been implemented and are in use to provide network security.   This edition streamlines subject matter with new and updated material — including Sage, one of the most important features of the book. Sage is an open-source, multiplatform, freeware package that implements a very powerful, flexible, and easily learned mathematics and computer algebra system. It provides hands-on experience with cryptographic algorithms and supporting homework assignments. With Sage, students learn a powerful tool that can be used for virtually any mathematical application. The book also provides an unparalleled degree of support for instructors and students to ensure a successful teaching and learning experience.  The full text downloaded to your computer With eBooks you can: search for key concepts, words and phrases make highlights and notes as you study share your notes with friends eBooks are downloaded to your computer and accessible either offline through the Bookshelf (available as a free download), available online and also via the iPad and Android apps. Upon purchase, you'll gain instant access to this eBook. Time limit The eBooks products do not have an expiry date. You will continue to access your digital ebook products whilst you have your Bookshelf installed.

Cryptography and Network Security: Principles and Practice, Global Edition

• Notation


• Preface


• Contents


• About the Author


• Part One: Background


• Chapter 1 Computer and Network Security Concepts


• 1.1 Computer Security Concepts


• 1.2 The OSI Security Architecture


• 1.3 Security Attacks


• 1.4 Security Services


• 1.5 Security Mechanisms


• 1.6 Fundamental Security Design Principles


• 1.7 Attack Surfaces and Attack Trees


• 1.8 A Model for Network Security


• 1.9 Standards


• 1.10 Key Terms, Review Questions, and Problems


• Chapter 2 Introduction to Number Theory


• 2.1 Divisibility and the Division Algorithm


• 2.2 The Euclidean Algorithm


• 2.3 Modular Arithmetic


• 2.4 Prime Numbers


• 2.5 Fermat's and Euler's Theorems


• 2.6 Testing for Primality


• 2.7 The Chinese Remainder Theorem


• 2.8 Discrete Logarithms


• 2.9 Key Terms, Review Questions, and Problems


• Appendix 2A The Meaning of Mod


• Part Two: Symmetric Ciphers


• Chapter 3 Classical Encryption Techniques


• 3.1 Symmetric Cipher Model


• 3.2 Substitution Techniques


• 3.3 Transposition Techniques


• 3.4 Rotor Machines


• 3.5 Steganography


• 3.6 Key Terms, Review Questions, and Problems


• Chapter 4 Block Ciphers and the Data Encryption Standard


• 4.1 Traditional Block Cipher Structure


• 4.2 The Data Encryption Standard


• 4.3 A DES Example


• 4.4 The Strength of DES


• 4.5 Block Cipher Design Principles


• 4.6 Key Terms, Review Questions, and Problems


• Chapter 5 Finite Fields


• 5.1 Groups


• 5.2 Rings


• 5.3 Fields


• 5.4 Finite Fields of the Form GF(p)


• 5.5 Polynomial Arithmetic


• 5.6 Finit