Mathematician:William Frederick Friedman

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American cryptographer instrumental in breaking Japan's PURPLE cipher before America's entrance into World War II.


American (of Russian origin)


  • Born: 24 Sept 1891 in Kishinev, Bessarabia Governorate
  • Died: 12 Nov 1969 in Washington, D.C.


Articles of his appear in Scripta Mathematica on the subject of cryptography.

Also known as

Originally Wolf Friedman, his name was changed to William soon after his arrival in the United States as an infant.