A chronicle of cryptography and an explanation of the cryptographer's craft.

During their attempts to create a computer site for encrypted data, the grandchildren of World War II cryptologists stumble on a massive conspiracy linked to an unbreakable Nazi code

Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink

Examines the history of writing and provides instructions for making special inks, using various alphabets and codes, and creating personal seals and private letter drops

Simple step-by-step instructions describe how to make and break over twenty different codes and ciphers

Seizing the Enigma tells the thrilling story of the Royal Navy's battle to crack the German's supposedly unbreakable U-boat Enigma code, which would allow the vital Allied convoys in the North Atlantic to be routed away from Donitz's wolfpacks.

The complete untold story of the cracking of the infamous Nazi code Most histories of the cracking of the elusive Enigma code focus on the work done by the codebreakers at Bletchley Park, Britain's famous World War II counterintelligence station. In this fascinating account, however, we are told, for the first time, the hair-raising stories of the heroic British and American sailors, spies, and secret agents who put their lives on the line to provide...

Joining the elite Bletchley Park codebreaking team during World War II, three women from very different walks of life uncover a spy's dangerous agenda years later against the backdrop of the royal wedding of Elizabeth and Philip

In this picture book biography, young readers will learn all about Elizebeth Friedman (1892-1980), a brilliant American code breaker who smashed Nazi spy rings, took down gangsters, and created the CIA's first cryptology unit. Her story came to light when her secret papers were finally declassified in 2015. From thwarting notorious rumrunners with only paper and pencil to "counter-spying into the minds and activities of" Nazis, Elizebeth held a pivotal...