Signal Intelligence Service
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The Signal Intelligence Service was the United States Army codebreaking division through World War II. It was founded in 1930 to compile codes for the Army. It was renamed the Signal Security Agency i
Ann Z. Caracristi (cryptanalyst)
U.S. Army Signals Intelligence Service personnel at Arlington Hall (c. 1943)
William Friedman
Abraham Sinkov
The United States Army Security Agency was the United States Army's signals intelligence branch from 1945 to 1977. The Latin motto of the Army Security Agency was Semper Vigilis, which echoes the decl
Signal Intelligence Service
…World War II. It was founded in 1930 to compile codes for the Army. It was renamed the Signal Security Agency in 1943, and in September 1945, became the Army Security Agency. For most of the war it was headquartered at Arlington Hall (former campus of Arlington Hall Junior College for Women), on Arlington Boulevard in…
Army Security Agency Shoulder Sleeve Insignia
Davis Station entrance