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Modern Cryptography: Theory and Practice (paperback)

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Modern Cryptography: Theory and Practice (paperback)


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  • Realistic guidance on building “fit for application” cryptographic systems—Shows students why conventional cryptographic implementations are often inadequate, and how to build systems that are far more secure.
    • Helps students go beyond theory to build next-generation cryptographic systems that overcome the limitations of current technologies.

  • Sophisticated formal methods—Introduces advanced formal methods for demonstrating the security of cryptographic systems and protocols.
    • Helps students design cryptographic systems that are demonstrably secure.

  • Assessments of key cryptographic standards—Compares and evaluates contemporary encryption protocols and standards, including IPSec, IKE, SSH, SSL, TLS, and Kerberos.
    • Helps students understand how todays leading encryption protocols and standards were designed, and recognize their vulnerabilities.

  • Essential mathematics for advanced cryptography—Presents all the math students will need, including probability and information theory, computational complexity, and algebraic foundations.
    • Enables students to master advanced cryptographic design and development, even if they come to the course without a thorough grounding in the mathematics.

  • Extensive practical examples—Presents realistic implementation examples for a wide range of cryptographic systems.
    • Helps students more clearly understand how cryptographic theory can be translated into real-world implementation.

  • By one of the fields leading experts—By Wenbo Mao, leader of Hewlett-Packards contributions to the European Unions Secure Electronic Commerce Transactions (CASENET), a research project.
    • Gives students confidence that they are receiving state-of-the-art information that is thorough, accurate, clear, and useful.


  • Copyright 2004
  • Dimensions: 7" x 9-1/4"
  • Pages: 752
  • Edition: 1st
  • Book
  • ISBN-10: 0-13-288741-X
  • ISBN-13: 978-0-13-288741-0

"This book would be a good addition to any cryptographer's bookshelf. The book is self-contained; it presents all the background material to understand an algorithm and all the development to prove its security. I'm not aware of another book that's as complete as this one."

--Christian Paquin, Cryptographic/Security Developer, Silanis Technology Inc. "The book is both complete, and extraordinarily technically accurate. It would certainly be a useful addition to any cryptographer's or crypto-engineer's library."

--Marcus Leech, Advisor, Security Architecture and Planning, Nortel Networks Build more secure crypto systems--and prove their trustworthiness Modern Cryptography is the indispensable resource for every technical professional who needs to implement strong security in real-world applications.

Leading HP security expert Wenbo Mao explains why "textbook" crypto schemes, protocols, and systems are profoundly vulnerable by revealing real-world-scenario attacks. Next, he shows how to realize cryptographic systems and protocols that are truly "fit for application"--and formally demonstrates their fitness. Mao presents practical examples throughout and provides all the mathematical background you'll need.

Coverage includes:

  • Crypto foundations: probability, information theory, computational complexity, number theory, algebraic techniques, and more
  • Authentication: basic techniques and principles vs. misconceptions and consequential attacks
  • Evaluating real-world protocol standards including IPSec, IKE, SSH, TLS (SSL), and Kerberos
  • Designing stronger counterparts to vulnerable "textbook" crypto schemes

Mao introduces formal and reductionist methodologies to prove the "fit-for-application" security of practical encryption, signature, signcryption, and authentication schemes. He gives detailed explanations for zero-knowledge protocols: definition, zero-knowledge properties, equatability vs. simulatability, argument vs. proof, round-efficiency, and non-interactive versions.

Sample Content

Table of Contents

A Short Description of the Book.


List of Figures.

List of Algorithms, Protocols and Attacks.


1. Beginning with a Simple Communication Game.

A Communication Game. Criteria for Desirable Cryptographic Systems and Protocols. Chapter Summary. Exercises. 2. Wrestling between Safeguard and Attack.

Introduction. Encryption. Vulnerable Environment (the Dolev-Yao Threat Model). Authentication Servers. Security Properties for Authenticated Key Establishment. Protocols for Authenticated Key Establishment Using Encryption. Chapter Summary. Exercises.


Standard Notation.
3. Probability and Information Theory.

Introduction. Basic Concept of Probability. Properties. Basic Calculation. Random Variables and their Probability Distributions. Birthday Paradox. Information Theory. Redundancy in Natural Languages. Chapter Summary. Exercises. 4. Computational Complexity.

Introduction. Turing Machines. Deterministic Polynomial Time. Probabilistic Polynomial Time. Non-deterministic Polynomial Time. Non-Polynomial Bounds. Polynomial-time Indistinguishability. Theory of Computational Complexity and Modern Cryptography. Chapter Summary. Exercises. 5. Algebraic Foundations.

Introduction. Groups. Rings and Fields. The Structure of Finite Fields. Group Constructed Using Points on an Elliptic Curve. Chapter Summary. Exercises. 6. Number Theory.

Introduction. Congruences and Residue Classes. Euler's Phi Function. The Theorems of Fermat, Euler and Lagrange. Quadratic Residues. Square Roots Modulo Integer. Blum Integers. Chapter Summary. Exercises.


7. Encryption—Symmetric Techniques.

Introduction. Definition. Substitution Ciphers. Transposition Ciphers. Classical Ciphers: Usefulness and Security. The Data Encryption Standard (DES). The Advanced Encryption Standard (AES). Confidentiality Modes of Operation. Key Channel Establishment for Symmetric Cryptosystems. Chapter Summary. Exercises. 8. Encryption—Asymmetric Techniques.

Introduction. Insecurity of “Textbook Encryption Algorithms”. The Diffie-Hellman Key Exchange Protocol. The Diffie-Hellman Problem and the Discrete Logarithm Problem. The RSA Cryptosystem (Textbook Version). Cryptanalysis Against Public-key Cryptosystems. The RSA Problem. The Integer Factorization Problem. Insecurity of the Textbook RSA Encryption. The Rabin Cryptosystem (Textbook Version). Insecurity of the Textbook Rabin Encryption. The ElGamal Cryptosystem (Textbook Version). Insecurity of the Textbook ElGamal Encryption. Need for Stronger Security Notions for Public-key Cryptosystems. Combination of Asymmetric and Symmetric Cryptography. Key Channel Establishment for Public-key Cryptosystems. Chapter Summary. Exercises. 9. In an Ideal World: Bit Security of the Basic Public-Key Cryptographic Functions.

Introduction. The RSA Bit. The Rabin Bit. The ElGamal Bit. The Discrete Logarithm Bit. Chapter Summary. Exercises. 10. Data Integrity Techniques.

Introduction. Definition. Symmetric Techniques. Asymmetric Techniques I:Digital Signatures. Asymmetric Techniques II: Data Integrity without Source Identification. Chapter Summary. Exercises.


11. Authentication Protocols—Principles.

Introduction. Authentication and Refined Notions. Convention. Basic Authentication Techniques. Password-based Authentication. Authenticated Key Exchange Based on Asymmetric Cryptography. Typical Attacks on Authentication Protocols. A Brief Literature Note. Chapter Summary. Exercises. 12. Authentication Protocols—The Real World.

Introduction. Authentication Protocols for Internet Security. The Secure Shell (SSH) Remote Login Protocol. The Kerberos Protocol and its Realization in Windows 2000. SSL and TLS. Chapter Summary. Exercises. 13. Authentication Framework for Public-Key Cryptography.

Introduction. Directory-Based Authentication Framework. Non-Directory Based Public-key Authentication Framework. Chapter Summary. Exercises.


14. Formal and Strong Security Definitions for Public-Key Cryptosystems.

Introduction. A Formal Treatment for Security. Semantic Security—the Debut of Provable Security. Inadequacy of Semantic Security. Beyond Semantic Security. Chapter Summary. Exercises. 15. Provably Secure and Efficient Public-Key Cryptosystems.
Introduction. The Optimal Asymmetric Encryption Padding. The Cramer-Shoup Public-key Cryptosystem. An Overview of Provably Secure Hybrid Cryptosystems. Literature Notes on Practical and Provably Secure Public-key Cryptosystems. Chapter Summary. Exercises.
16. Strong and Provable Security for Digital Signatures.

Introduction. Strong Security Notion for Digital Signatures. Strong and Provable Security for ElGamal-family Signatures. Fit-for-application Ways for Signing in RSA and Rabin. Signcryption. Chapter Summary. Exercises. 17. Formal Methods for Authentication Protocols Analysis.

Introduction. Toward Formal Specification of Authentication Protocols. A Computational View of Correct Protocols—the Bellare-Rogaway Model. A Symbolic Manipulation View of Correct Protocols. Formal Analysis Techniques: State System Exploration. Reconciling Two Views of Formal Techniques for Security. Chapter Summary. Exercises.


18. Zero-Knowledge Protocols.

Introduction. Basic Definitions. Zero-knowledge Properties. Proof or Argument? Protocols with Two-sided-error. Round Efficiency. Non-interactive Zero-knowledge. Chapter Summary. Exercises. 19. Returning To “Coin Flipping over Telephone”.

Blum's “Coin-Flipping-by-Telephone” Protocol. Security Analysis. Efficiency. Chapter Summary. 20.Afterremark.

Bibliography. Subject Index.


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