William F. Friedman
(1891-1969)
American cryptographer
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William Frederick Friedman (September 24, 1891 – November 12, 1969) was a US Army cryptographer who ran the research division of the Army's Signal Intelligence Service (SIS) in the 1930s, and parts of its follow-on services into the 1950s. In 1940, subordinates of his led by Frank Rowlett broke Japan's PURPLE cipher, thus disclosing Japanese diplomatic secrets before America's entrance into World War II.
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| Born |
24 September 1891 Kishinev, Bessarabia
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| Died |
12 November 1969 (aged 78) Washington, D.C., United States
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| Zodiac | Libra |
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