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.

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. "1940. As England prepares to fight the Nazis, three very different women answer the call to mysterious country estate Bletchley Park, where the best minds in Britain train to break German military codes. Vivacious debutante...

This issue brief discusses the history of blockchain technology, its current and future applications, and recently proposed Colorado legislation related to this technology.

Again, brilliant Harvard professor Robert Langdon finds himself in a predicament that requires his vast knowledge of symbology and superior problem-solving skills to save the day. The setting, unlike other Robert Langdon novels, is stateside, and in Brown's hands Washington D.C. is as fascinating as Paris or Vatican City (note to the D.C. tourism board: get your "Lost Symbol" tour in order). And, as with other Dan Brown books, the pace is relentless,...

Describes the function of the more than 400 Navajo marines who invented a secret code that was never broken by the enemy during World War II.

"There has been a great deal of writing the past several decades about Native American Code Talkers of World War Two. The published works have been about Navajos and the tremendous contribution they made in the Pacific campaigns of the war. What is often overlooked is the role played in both World Wars by men of other tribes. There were Cherokee, Choctaw, Comanche, Creek and other tribal representatives with their languages involved as well.

"This new, revised edition of The Bitcoin Guidebook has the most up-to-date info and recommended approaches for anyone who doesn't want to be left behind in the next technological revolution. It is an easy-to-read, easy-to-understand guide that explains everything the reader needs to know about how Bitcoin and other digital currencies work, what they can be used for, and how they will shape our society in the future." --amazon.com.