Computer Security and Cryptography

ORGANIZATION OF THE BOOK

There are three types of chapters in this book:

1. Those that develop technical details;
2. Those that describe a cryptosystem and possibly indicate method(s) of analysis; and
3. Those that describe a cryptosystem, indicate method(s) of analysis, and provide problems to test the students understanding; these are signalled with .

Classical Cryptography

• 1. Aperitifs
• 2. Columnar Transposition
• 3. Monoalphabetic Substitution

  (a) Cribbing and Scoring a Monoalphabetic Substitution

  (b) Hill Substitution

  (c) The Hidden Markov Model

• 4. Polyalphabetic Substitution
• 5. Statistical Tests

World War II Cryptography

• 6. Emergence of the Cipher Machine

  (a) The German Enigma Machine

  (b) The Lorenz Schlusselzusatz

• 7. The Japanese Cipher Machines

  (a) The Japanese RED Machine

  (b) The Japanese PURPLE Machine

Modern Cryptography

• 8. Stream Ciphers
• 9. The NIST Encryption Standards

  (a)