Cryptography in C and C++ Paperback Michael Welschenbach - Pasta blanda

This book offers a comprehensive, yet relentlessly practical overview of the fundamentals of modern cryptography. Welschenbach avoids complexities by explaining cryptography and its mathematical basis in terms a programmer can easily understand. Coverage mainly focuses on the practical aspects involved in implementing public key cryptography methods, such as the RSA algorithm. It also gives both a technical overview and an implementation of the Rijndael Advanced Encryption Standard algorithm. The book includes a wide-ranging library of code in C and C++, including the RSA algorithm, completed by an extensive Test Suite that proves that the code works correctly. Readers will learn, step by step, how to implement a platform independent library for the all-important multi-precision arithmetic used in modern cryptography. This is followed by an implementation of the cryptographic algorithms themselves. The CD-ROM includes all the programs presented in the book, x86 assembler programs for basic arithmetical operations, implementations of Rijndael in both C and C++ and more. TOC:Part I. Arithmetic and Number Theory in CIntroduction.- Number Format- The Representation of Large Integers in C.- Interface Semantics.- Basic Calculations.- Modular Arithmetic- Calculating with Residue Classes.- Where Everything Comes Together: Modular Exponentiation.- Bitwis and Logical Functions.- Input, Output, Assignment, Conversion.- Dynamic Registers.- Number-Theoretic Functions.- Large Random Numbers.- Tests.Part II: Arithmetic in C++ with the Class LINTClasses: With C++ Everything is Easier.- The LINT Public Interface: Members and Friends.- Error Handling.- An Application Example: The RSA Cryptosstem.- Do It Yourself: Test LINT.- Approaches to Further Development.- Afterword.- References.- Appendix A: Rijndael, A Successor to DES.- Appendix B: List of C Functions.- Appendix C: List of C++ Functions.- Appendix D: Macros.- Appendix E: Calculation Times.- Appendix F: Notation.- Appendix G: Arithmetic and Number-Theoretic Software Packages.- Appendix H: List of Figures and Tables.- Index.