Story-Driven Cryptography

Balancing the technical rigour of a textbook with the narrative flow of a novel, Cryptography Castle is an educational adventure that captures the fundamental concepts and fascinating history of cryptography in an engaging manner. Join Hanne as she explores the castle and discovers the secrets of cryptography from Princess Alice and Prince Bob.

Book 1, Wartime Codebreaking, follows Enigma, Bletchley Park, and the codebreakers who changed the course of World War II.

Read Book 1 Free Online
  1. Ancient Caesar’s shift cipher
  2. 1400s Alberti’s cipher disk
  3. 1918 Enigma invented
  4. 1932 Poles crack Enigma
  5. 1943 Colossus completed
  6. 1950 Turing’s Imitation Game
Cryptography Castle: Wartime Codebreaking book cover

What's inside

From the Caesar cipher to the birth of modern computing

Foundations

Classical Ciphers

Caesar, Vigenère, and Alberti ciphers, and the techniques used to break them.

Wartime

Enigma & Lorenz

The complex German cipher machines, and how the Polish and British codebreakers broke them.

History

Bletchley Park

The people and machines behind Ultra intelligence, and its impact on the war's outcome.

Legacy

Turing & the Birth of AI

Alan Turing's pioneering work, and how wartime codebreaking gave rise to modern computing and AI.