''The American Black Chamber'' is a 1931 book by Herbert O. Yardley. The book describes the inner workings of the interwar American governmental cryptography organization called the

Black Chamber The Black Chamber (1919–1929), also known as the Cipher Bureau, was the United States' first peacetime cryptanalytic organization, and a forerunner of the National Security Agency. The only prior codes and cypher organizations maintained by th ...

. The cryptography historian David Kahn called the book "the most famous book on cryptology ever published." By describing the inner workings of the organization, the book created large interest and heightened public awareness of the United States's cryptographic abilities. In particular, the Japanese government became aware of the extent of experience that the American government had with cryptography and increased the strength of their own knowledge in cryptography in response. Reviewers suggested the book may have cost the United States significantly in the Pacific theater against Japan in World War II. The book was made into a film titled

Rendezvous (1935 film) ''Rendezvous'' is a 1935 American spy film set in World War I, directed by William K. Howard, starring William Powell and Rosalind Russell and featuring Binnie Barnes, Lionel Atwill, Cesar Romero and Samuel S. Hinds. Powell plays an American cry ...

starring

William Powell William Horatio Powell (July 29, 1892 – March 5, 1984) was an American actor. A major star at Metro-Goldwyn-Mayer, he was paired with Myrna Loy in 14 films, including the '' Thin Man'' series based on the Nick and Nora Charles characters cr ...

and

Rosalind Russell Catherine Rosalind Russell (June 4, 1907November 28, 1976) was an American actress, comedienne, screenwriter, and singer,Obituary '' Variety'', December 1, 1976, p. 79. known for her role as fast-talking newspaper reporter Hildy Johnson in the H ...

References

History of cryptography 1931 non-fiction books History books about the United States {{Crypto-stub