Index:

• Lesson 1: Simple Substitution
• Lesson 2: Substitutions With Variants
• Lesson 3: Substitutions With Variants Part II: Multiliteral Substitution
• Lesson 4: Substitutions With Variants Part III: Multiliteral Substitution
• Lesson 5: Xenocrypt Morphology
• Lesson 6: Xenocrypt Morphology Part II
• Lesson 7: Xenocrypt Morphology Part III
• Lesson 8: Introduction To Cryptarithms And Hill Cipher
• Lesson 9: German Reduction Ciphers: Enigma In Historical And Modern Times
• Lesson 10:
  • Polyalphabetic Substitution Systems I
  • Viggy's Family And Quagmires I - IV
  • Applications Of The Principals Of Symmetry
• Lesson 11:
  • Polyalphabetic Substitution Systems II
  • Cryptanalysis Of Viggy's Family
• Lesson 12:
  • Polyalphabetic Substitution Systems III
  • Cryptanalysis Of Viggy's Extended Family
  • Decimation In Detail
• Lesson 13:
  • Aperiodic Systems
  • Improving Cryptographic Security In Polyalphabetic Systems
• Lesson 14: Ledge's Introduction To Cryptarithms II
• Lesson 15: Statistical Attacks
• Lesson 16: Transposition
• Lesson 17:
  • Headline Puzzles, Playfair, Foursquare
  • Fractination And Delastelle Systems
• Lesson 18: Ledge's Introduction To Cryptarithms III
• Lesson 19: Passwords, Privacy, Data Protection
• Lesson 20: Codes
• Lesson 21: Cryptanalysis Of The Navy CSP 1500 Cipher Machine [Hagelin C-38 Family]
• Lesson 22: Cipher Machines II
• Lesson 23: Data Encryption Standard (DES)
• Lesson 24: Special Topics
• Annotated Cryptographic Resources And References