Provides an overview of various types of codes that were used throughout history to send secret messages, including those used by Spartan warriors, Elizabeth I, Navajo Code talkers, and Cold War spies.

Provides an overview of the ciphers, codes, algorithms, and keys used in real-life situations to keep people's information safe and secure.

Shares the history of cryptography and explains how some of the greatest minds discovered how to make and break codes.

Traces the life of Elizebeth Smith, who met and married groundbreaking cryptologist William Friedman and worked with him to discover and expose Nazi spy rings in South America by cracking multiple versions of the Enigma machine.

1940. As England prepares to fight the Nazis, three very different women answer the call to Bletchley Park, where the best minds in Britain train to break German military codes. Osla puts her fluent German to use as a translator of decoded enemy secrets. Mab works the legendary codebreaking machines and looks for a socially advantageous husband. Beth's shyness conceals a brilliant facility with puzzles, and she becomes one of the Park's few female...

Recruited by the U.S. Army and Navy from small towns and elite colleges, more than ten thousand women served as codebreakers during World War II. While their brothers and boyfriends took up arms, these women moved to Washington and learned the meticulous work of code-breaking. Their efforts shortened the war, saved countless lives, and gave them access to careers previously denied to them.

Through narrative nonfiction text, readers learn about the men who used the Navajo language to create a successful, top-secret code that was never cracked by enemy forces.

Describes the role of a select group of Navajo Marines who developed a code based on their own native language that provided a means for secure communications among American forces in the Pacific during World War II.

An inspiring graphic novel about Elizebeth Friedman, a codebreaking pioneer who changed the course of World War II. Nazi spy rings! No-good gangsters! Shakespearian lies! Discover the courageous woman who cracked all these cases and more-with only a pencil and paper. The youngest of ten siblings, Elizebeth Friedman stood out from an early age with brilliant language skills and a passion for English literature. Eventually, these talents led to a new...

"As World War II rages in North Africa, General Irwin Rommel marches his troops swiftly through Egypt, aiming to overrun he entire Middle East. An uncanny sense of his enemies' weaknesses and positions informs each move. The Nazis, somehow, have a source for the Allies' greatest secrets. Yet Rommel is not the only one with stolen knowledge. Allied cryptographers are breaking the extraordinarily complex Nazi code Enigma. On the brink of disaster, a...