cryptography

About the spread of communism and the Cold War between the United States and the USSR.

Profiles seventy-five surviving Navajo code talkers and discusses how they helped the United States devise a code that the Japanese could not break during World War II.

"From Pearl Harbor to Bletchley Park, readers will learn the true stories of the brave men and women who worked behind the scenes to crack codes and gain information during World War II"--Provided by publisher.

"Looks at the secret war on a global basis, bringing together the British, American, German, Russian and Japanese histories [and] examines the espionage and intelligence machines of all sides in World War II, and the impact of spies, code-breakers and partisan operations on events"--Provided by publisher.

Presents a guide to codemaking, codebreaking, and their role in history, describing different types of codes and ciphers, discussing codebreaking and concealment techniques, and including brief stories about exciting moments in the history of the art.

After being taught in a boarding school run by whites that Navajo is a useless language, Ned Begay and other Navajo men are recruited by the Marines to become Code Talkers, sending messages during World War II in their native tongue.

This book features step-by-step instructions on making invisible ink while encouraging further exploration on the topic.

After being taught in a boarding school run by whites that Navajo is a useless language, Ned Begay and other Navajo men are recruited by the Marines to become Code Talkers, sending messages during World War II in their native tongue.

"Mr. Quisling is definitely up to something mysterious, and Emily and James are on high alert. First, there's the coded note he drops at a book event. Then Emily and James uncover a trail of encrypted messages in books by Mark Twain hidden through Book Scavenger. What is most suspicious is that each hidden book triggers an arson"--OCLC.

Chronicles the lives of Elizebeth Friedman and her husband, William F. Friedman, cryptographers who helped the United States government during the early and mid-twentieth century, and looks at the history of code-breaking.