Mathematician:William Frederick Friedman

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

Nationality
American (of Russian origin)

History

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

Publications
Possibly the author of an article in Volume 8 of on the subject of making One Half using all 9 Digits, as reported by  in his $1986$ work.

Other articles of his appear in 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.