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Cryptologic History

Every little bit helps the NCF to influence the cryptologic future by sharing our educational resources, stimulating new knowledge, and commemorating our heritage.

"On This Date in Cryptologic History" Calendar

1973: 509th Radio Research Group was resubordinated.

Saturday, March 7, 2026

7 March 1973: The 509th Radio Research Group was resubordinated, ending ASA's 12-year presence in South Vietnam.

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Learn About the Pioneers

Learn about the various individuals and groups who paved the way in the field of cryptology, cyber, computers, and more.