The Reader of Gentlemen's Mail: Herbert O. Yardley and the Birth of American Codebreaking
About this ebook
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.
