Abraham Sinkov

Abraham Sinkov was a mathematician who joined the U.S. Army Signal Intelligence Service in 1930. His later assignments included establishing an Army intercept site in the Panama Canal Zone and leading the American detachment at the Central Bureau in the Southwest Pacific.

Operational and defensive cryptology

After the war, Sinkov became chief of the Communications Security program as U.S. cryptologic organizations transitioned into the NSA era. He subsequently served as Deputy Director for Production and later taught mathematics at Arizona State University.

In memoriam

Sinkov died in 1998. His career shows how mathematical training, intelligence operations, and communications protection developed together.

Timeline

• 1907Born in Philadelphia, Pennsylvania, United States.
• 1930Joins the U.S. Army Signal Intelligence Service.
• 1936Establishes the Army’s first permanent intercept site outside the continental United States.
• 1942Arrives in Melbourne to lead the American detachment at Central Bureau.
• 1949Becomes chief of Communications Security at the Armed Forces Security Agency.
• 1998Dies in Arizona.