1 Introduction -- 2 What is cryptography? -- 3 Preliminary concepts -- 4 Cryptographer’s toolbox -- 5 Substitution ciphers -- 6 Countermeasures -- 7 Transposition -- 8 Jefferson Wheel Cypher -- 9 Fractionation -- 10 Variable-length fractionation -- 11 Block ciphers -- 12 Principles for secure encryption -- 13 Stream ciphers -- 14 One-time pad -- 15 Matrix methods -- 16 Three pass protocol -- 17 Codes -- 18 Quantum computers -- Fun pages -- Challenge -- Epilogue -- index
Summary
Explore the fascinating and rich world of Secret Key cryptography! This book provides practical methods for encrypting messages, an interesting and entertaining historical perspective, and an incredible collection of ciphers and codes—including 30 unbreakable methods
