One of the most colorful and controversial figures in American intelligence, Herbert O. Yardley (1889-1958) gave America its best form of information, but his fame rests more on his indiscretions than on his achievements. In this highly readable biography, a premier historian of military intelligence tells Yardley's story and evaluates his impact on the American intelligence community. Yardley established the nation's first codebreaking agency in 1917, and his solutions helped the United States win a major diplomatic victory at the 1921 disarmament conference. But when his unit was closed in 1929 because "gentlemen do not read each other's mail," Yardley wrote a best-selling memoir that introduced-and disclosed-codemaking and codebreaking to the public. David Kahn de-scribes the vicissitudes of Yardley's career, including his work in China and Canada, offers a capsule history of American intelligence up to World War I, and gives a short course in classical codes and ciphers. He debunks the accusations that the publication of Yardley's book caused Japan to change its codes and ciphers and that Yardley traitorously sold his solutions to Japan. And he asserts that Yardley's disclosures not only did not hurt but actually helped American codebreaking during World War II.

From James McManus, author of the bestselling Positively Fifth Street, comes the definitive story of the game that, more than any other, reflects who we are and how we operate. Cowboys Full is the story of poker, from its roots in China, the Middle East, and Europe to its ascent as a global—but especially an American—phenomenon. It describes how early Americans took a French parlor game and, with a few extra cards and an entrepreneurial spirit, turned it into a national craze by the time of the Civil War. From the kitchen-table games of ordinary citizens to its influence on generals and diplomats, poker has gone hand in hand with our national experience. Presidents from Abraham Lincoln to Barack Obama have deployed poker and its strategies to explain policy, to relax with friends, to negotiate treaties and crises, and as a political networking tool. The ways we all do battle and business are echoed by poker tactics: cheating and thwarting cheaters, leveraging uncertainty, bluffing and sussing out bluffers, managing risk and reward. Cowboys Full shows how what was once accurately called the cheater's game has become amostly honest contest of cunning, mathematical precision, and luck. It explains how poker, formerly dominated by cardsharps, is now the most popular card game in Europe, East Asia, Australia, South America, and cyberspace, as well as on television. It combines colorful history with firsthand experience from today's professional tour. And it examines poker's remarkable hold on American culture, from paintings by Frederic Remington to countless poker novels, movies, and plays. Braiding the thrill of individual hands with new ways of seeing poker's relevance to our military, diplomatic, business, and personal affairs, Cowboys Full is sure to become the classic account of America's favorite pastime.

The first edition of this award-winning book attracted a wide audience. This second edition is both a joy to read and a useful classroom tool. Unlike traditional textbooks, it requires no mathematical prerequisites and can be read around the mathematics presented. If used as a textbook, the mathematics can be prioritized, with a book both students and instructors will enjoy reading. Secret History: The Story of Cryptology, Second Edition incorporates new material concerning various eras in the long history of cryptology. Much has happened concerning the political aspects of cryptology since the first edition appeared. The still unfolding story is updated here. The first edition of this book contained chapters devoted to the cracking of German and Japanese systems during World War II. Now the other side of this cipher war is also told, that is, how the United States was able to come up with systems that were never broken. The text is in two parts. Part I presents classic cryptology from ancient times through World War II. Part II examines modern computer cryptology. With numerous real-world examples and extensive references, the author skillfully balances the history with mathematical details, providing readers with a sound foundation in this dynamic field. FEATURES Presents a chronological development of key concepts Includes the Vigenère cipher, the one-time pad, transposition ciphers, Jefferson’s wheel cipher, Playfair cipher, ADFGX, matrix encryption, Enigma, Purple, and other classic methods Looks at the work of Claude Shannon, the origin of the National Security Agency, elliptic curve cryptography, the Data Encryption Standard, the Advanced Encryption Standard, public-key cryptography, and many other topics New chapters detail SIGABA and SIGSALY, successful systems used during World War II for text and speech, respectively Includes quantum cryptography and the impact of quantum computers

Much has been written about U.S. intelligence operations. However, intelligence, as it is conducted in the U.S. domestic environment, has usually been treated in a fractured and sensationalistic manner. This book dispassionately assesses the U.S. domestically oriented intelligence enterprise by first examining its individual components and then sho

“Simultaneously sweeping and intimate . . . an eminently readable and engrossing account of the actions that pulled America into the Second World War.” —Parks Stephenson, producer, The Fight for Owens Pearl: December 7, 1941 is the story of how America and Japan, two nations with seemingly little over which to quarrel, let peace slip away, so that on that “day which will live in infamy,” more than 350 dive bombers, high-level bombers, torpedo planes, and fighters of the Imperial Japanese Navy did their best to cripple the United States Navy’s Pacific Fleet, killing 2,403 American servicemen and civilians, and wounding another 1,178. It’s a story of emperors and presidents, diplomats and politicians, admirals and generals—and it’s also the tale of ordinary sailors, soldiers, and airmen, all of whom were overtaken by a rush of events that ultimately overwhelmed them. Pearl shows the real reasons why America’s political and military leaders underestimated Japan’s threat against America’s security, and why their Japanese counterparts ultimately felt compelled to launch the Pearl Harbor attack. Pearl offers more than superficial answers, showing how both sides blundered their way through arrogance, over-confidence, racism, bigotry, and old-fashioned human error to arrive at the moment when the Japanese were convinced that there was no alternative to war. Once the battle is joined, Pearl then takes the reader into the heart of the attack, where the fighting men of both nations showed that neither side had a monopoly on heroism, courage, cowardice, or luck, as they fought to protect their nations. “An engrossing read on a well-tread but important subject. Pearl will interest readers new to this history and satiate military historians.” —Air & Space Power Journal

Elliot Carlson’s award-winning biography of Capt. Joe Rochefort is the first to be written about the officer who headed Station Hypo, the U.S. Navy’s signals monitoring and cryptographic intelligence unit at Pearl Harbor, and who broke the Japanese navy’s code before the Battle of Midway. The book brings Rochefort to life as the irreverent, fiercely independent, and consequential officer that he was. Readers share his frustrations as he searches in vain for Yamamoto’s fleet prior to the Japanese attack on Pearl Harbor, but share his joy when he succeeds in tracking the fleet in early 1942 and breaks the code that leads Rochefort to believe Yamamoto’s invasion target is Midway. His conclusions, bitterly opposed by some top Navy brass, are credited with making the U.S. victory possible and helping to change the course of the war. The author tells the story of how opponents in Washington forced Rochefort’s removal from Station Hypo and denied him the Distinguished Service Medal recommended by Admiral Nimitz. In capturing the interplay of policy and personality and the role played by politics at the highest levels of the Navy, Carlson reveals a side of the intelligence community seldom seen by outsiders. For a full understanding of the man, Carlson examines Rochefort’s love-hate relationship with cryptanalysis, his adventure-filled years in the 1930s as the right-hand man to the Commander in Chief of the U.S. Fleet, and his return to codebreaking in mid-1941 as the officer in charge of Station Hypo. He traces Rochefort’s career from his enlistment in 1918 to his posting in Washington as head of the Navy’s codebreaking desk at age twenty-five, and beyond. In many ways a reinterpretation of Rochefort, the book makes clear the key role his codebreaking played in the outcome of Midway and the legacy he left of reporting actionable intelligence directly to the fleet. An epilogue describes efforts waged by Rochefort’s colleagues to obtain the medal denied him in 1942—a drive that finally paid off in 1986 when the medal was awarded posthumously.