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Joseph John Rochefort (May 12, 1900 [1] – July 20, 1976) was an American naval officer and cryptanalyst. He was a major figure in the United States Navy 's cryptographic and intelligence operations from 1925 to 1946, particularly in the Battle of Midway .
Driscoll, with Lieutenant Joseph Rochefort, broke the Japanese Navy manual code, the Red Book Code, in 1926 after three years of work and helped to break the Blue Book Code in 1930. In early 1935, Driscoll led the attack on the Japanese M-1 cipher machine (also known to the U.S. as the ORANGE machine), which was used to encrypt the messages of ...
Wilford in his Decoding Pearl Harbor: USN Cryptanalysis and the Challenge of JN-25B in 1941, suggests that this view is now untenable and that the JN-25 codes were readable to a great extent and hence, lends "support to the revisionist theories of Toland and Stinnett". LCDR Joseph J. Rochefort led and handpicked many of the key codebreakers at ...
Jean Argles (1925–2023), British code breaker in World War II; Arne Beurling (1905–1986), Swedish mathematician and cryptographer. Lambros D. Callimahos, US, NSA, worked with William F. Friedman, taught NSA cryptanalysts. Ann Z. Caracristi, US, SIS, solved Japanese Army codes in World War II, later became deputy director of National ...
Edwin Thomas Layton was born on April 7, 1903, in Nauvoo, Illinois, as a son of George E. Layton and his wife Mary C. Layton.Layton attended the United States Naval Academy at Annapolis, Maryland, and graduated in 1924.
Cryptography was used extensively during World War II because of the importance of radio communication and the ease of radio interception.The nations involved fielded a plethora of code and cipher systems, many of the latter using rotor machines.
Alan Stripp, worked on Japanese codes (author of Codebreaker in the Far East) Sadie Stuart; Joy Tamblin (Director of the Women's Royal Air Force) Derek Taunt, arrived in Bletchley Park in August 1941, worked in Hut 6 (mathematician, later bursar of Jesus College, Cambridge) Telford Taylor, US Army (Counsel for the Prosecution at the Nuremberg ...
OP-20-G did some work on Japanese diplomatic codes, but the organization's primary focus was on Japanese military codes. The US Navy first got a handle on Japanese naval codes in 1922, when Navy agents broke into the Japanese consulate in New York City , cracked the safe, took photographs of pages of a Japanese navy codebook, and left, having ...