CODE 01 The Cypher That Led to the Death of Mary, Queen of Scots
The evolution of secret documents
Arab codebreakers
Decryption of the ciphertext
Renaissance in the West
Babington Conspiracy

CODE 02 Unbreakable Password
From the Vigenère Cipher Aversion Phenomenon to the Man in the Iron Mask
Black Chamber
Babbage vs. Vigenère cipher
From newspaper personal ads to underground treasures

CODE 03 Mechanization of Passwords
The Holy Grail of Cryptography
The Development of Encryption Machines - From Cipher Disks to Enigma

CODE 04 Decoding the Enigma
The goose that never cried
Codebook battle
anonymous cryptographers

CODE 05 Language Barrier
Deciphering Lost Languages ​​and Ancient Writings
The Mystery of Linear B
Syllables that build bridges
Minor rule violations

CODE 06 Alice and Bob Reveal
God rewards fools
The Birth of Public Key Cryptography
prime suspect
The Hidden History of Public Key Cryptography

CODE 07 Encryption Software, Pretty Good Privacy
Encryption for the general public or not?
Zimmerman's restoration of honor

CODE 08 A Great Leap into the Future
The Future of Cryptography
quantum cryptography

Password problem
Step 1: Simple single-substitution cipher
Step 2: Caesar Cipher
Step 3: Homonymous single substitution cipher
Step 4: Vigenère Cipher
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Appendix A: The first paragraph of Georges Perec's "The Blank"
Appendix B: Some Basic Tips for Frequency Analysis
Appendix C Bible Code
Appendix D Pigpen Password
Appendix E Playfair Password
Appendix F ADFGVX Cipher
Appendix G Problems with Reusing One-Time Random Number Keys
Appendix H: The Daily Telegraph Crossword Puzzle Answers
Appendix I: Puzzle Letters for the Interested Reader
Appendix J: Mathematical Theory Applied to RSA