Cryptology: Classical and Modern

1. Introduction to Cryptology Basic Terminology Cryptology in Practive Why Study Cryptology? 2. Substitution Ciphers Keyword Substitution Ciphers Cryptanalysis of Substitution Cipher Playrair Ciphers The Navajo Code 3. Transposition Ciphers Columnar Transposition Ciphers Cryptanalysis of Transposition Ciphers ADFGX and ADFGVX Ciphers 4. The Enigma Machine The Enigma Cipher Machine Combinatorics Security of the Enigma Machine 5. The Turing Bombe Cribs and Menus Loops and Logical Inconsistencies Searching for the Correct Configuration The Diagonal Board The Checking Machine Turnovers Clonking Final Observations 6. Shift and Affine Ciphers Modular Arithmetic Shift Ciphers Cryptanalysis of Shift Ciphers Affine Ciphers Cryptanalysis of Affine Ciphers 7. Alberti and Vigenere Ciphers Alberti Ciphers Vigenere Ciphers Probability The Friedman Test The Kasiski Test Cryptanalyis of Vigenere Keyword Ciphers 8. Hill Ciphers Matrices Hill Ciphers Cryptanalyis of Hill Ciphers 9. RSA Ciphers Introduction to Public-Key Ciphers Introduction to RSA Ciphers The Euclidean Algorithm Modular Exponentiation ASCII RSA Ciphers Cryptanalyis of RSA Ciphers Primality Testing Integer Factorization The RSA Factoring Challenges 10. ElGamal Ciphers The Diffie-Hellman Key Exchange Discrete Logarithms ElGamal Ciphers Cryptanalyis of ElGamal Ciphers 11. The Advanced Encryption Standard Representations of Numbers Sream Ciphers AES Preliminaries AES Encryption AES Decryption AES Security 12. Message Authentication RSA Signatures Hash Functions RSA Signatures with Hashing The Man-in-the-Middle Attack Public-Key Infrastructures Bibliography Hints and Answers for Selected Exercises Index

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