Cranston Public Library

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.

A handbook for the budding cryptographer including codes and ciphers, invisible inks, concealment techniques, spy stories and some history.

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.

"This book offers insight into blockchain and the ledgers tracking bitcoin transactions. ... discover how to use bitcoin to buy and sell stuff, get basics of bitcoin investing, and geek out on advanced topics like regulation and mining"--

In his first book since the bestselling Fermat's Enigma, Simon Singh offers the first sweeping history of encryption, tracing its evolution and revealing the dramatic effects codes have had on wars, nations, and individual lives. From Mary, Queen of Scots, trapped by her own code, to the Navajo Code Talkers who helped the Allies win World War II, to the incredible (and incredibly simple) logisitical breakthrough that made Internet commerce...

Describes how the American military in World War II used a group of Navajo Indians to create an indecipherable code based on their native language.

"An investigation into the history of ciphers, codebreaking, and artificial languages that focuses on the Rohonc Codex, a four-hundred-year-old manuscript written entirely in cipher"--

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...

Spanning both world wars and crisscrossing the U.S. and the Atlantic, Miss Havilland, by Gay Daly, is the story of a brilliant mathematician who must decide her purpose in life—and live with her difficult choices. 

Inspired by the true story of the author's tough-minded cousin, the story begins in California at the turn of the twentieth century, when a female student of mathematics was a rare curiosity. With the U.S. entering World

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