Understanding and Applying Cryptography and Data Security

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ISBN 9781420061604
Cat# AU6160



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  • Describes cryptography and data security from an implementation point of view, spanning hardware, software, and embedded systems
  • Focuses on cryptographic algorithms before dealing with the construction of cryptographic protocols
  • Includes many examples and homework problems to evaluate implementation results of software languages, such as assembly and C, and hardware description languages, such as VHDL and Verilog
  • Provides a solutions manual for qualifying instructors that contains a CD-ROM with C and VHDL frameworks for student implementation of homework problems as well as C and VHDL testing environments for instructor evaluation of student work


A How-to Guide for Implementing Algorithms and Protocols
Addressing real-world implementation issues, Understanding and Applying Cryptography and Data Security emphasizes cryptographic algorithm and protocol implementation in hardware, software, and embedded systems. Derived from the author’s teaching notes and research publications, the text is designed for electrical engineering and computer science courses.

Provides the Foundation for Constructing Cryptographic Protocols
The first several chapters present various types of symmetric-key cryptographic algorithms. These chapters examine basic substitution ciphers, cryptanalysis, the Data Encryption Standard (DES), and the Advanced Encryption Standard (AES). Subsequent chapters on public-key cryptographic algorithms cover the underlying mathematics behind the computation of inverses, the use of fast exponentiation techniques, tradeoffs between public- and symmetric-key algorithms, and the minimum key lengths necessary to maintain acceptable levels of security. The final chapters present the components needed for the creation of cryptographic protocols and investigate different security services and their impact on the construction of cryptographic protocols.

Offers Implementation Comparisons
By examining tradeoffs between code size, hardware logic resource requirements, memory usage, speed and throughput, power consumption, and more, this textbook provides students with a feel for what they may encounter in actual job situations.

A solutions manual is available to qualified instructors with course adoptions.



Table of Contents

A Brief History of Cryptography and Data Security
Cryptography and Data Security in the Modern World
Existing Texts
Book Organization

Symmetric-Key Cryptography
Cryptosystem Overview
The Modulo Operator
Greatest Common Divisor
The Ring Zm
Homework Problems

Symmetric-Key Cryptography: Substitution Ciphers
Basic Cryptanalysis
Shift Ciphers
Affine Ciphers
Homework Problems

Symmetric-Key Cryptography: Stream Ciphers
Random Numbers
The One-Time Pad
Key Stream Generators
Real-World Applications
Homework Problems

Symmetric-Key Cryptography: Block Ciphers
The Data Encryption Standard
The Advanced Encryption Standard

Public-Key Cryptography
Issues with Symmetric-Key Cryptosystems
Public-Key Cryptosystem Overview
One-Way Functions
The Euclidean Algorithm
The Extended Euclidean Algorithm
Euler’s Phi Function
Euler’s Theorem
Fermat’s Little Theorem
Homework Problems

Public-Key Cryptography: RSA
Efficient Implementation
Homework Problems

Public-Key Cryptography: Discrete Logarithms
Cyclic Groups
The Discrete Logarithm Problem
Diffie–Hellman Key Agreement Protocol
Efficient Implementation
ElGamal Encryption
Homework Problems

Public-Key Cryptography: Elliptic Curves
Diffie–Hellman Key Agreement Protocol
Efficient Implementation
Menezes–Vanstone Encryption
Homework Problems

Cryptographic Components
Digital Signatures
Hash Functions
Message Authentication Codes

Cryptographic Protocols
Security Services
Key Establishment
Homework Problems



Editorial Reviews

This book is a good technical reference for someone who wishes to implement (or install) a security system based on existing techniques … a good complementary book for a technical course to students who already know about the theory of cryptography but need to learn the technical details in order to implement existing protocols in new hardware.
—Jeremy Barbay, University of Chile, in SIGACT NEWS, December 2011

Downloads / Updates

Resource OS Platform Updated Description Instructions
Cross Platform October 30, 2009 Site with supplemental reading and files for homework problems click on http://www.understandingcryptography.com
AU6160_Companion_CD.zip Cross Platform March 17, 2014