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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

Learn about a wide variety of historical events related to cryptology, computers, math, cybersecurity, Intelligence, and more.

August 2026

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S M T W T F S
26 27 28 29 30 Jul 31 Aug 1
1972: Lt. Gen Sam Phillips Becomes DIRNSA....
1969: VADM Noel Gayler becomes DIRNSA
1958: Dr. Louis Tordella became D/DIRNSA
1920: Brigadier John H. Tiltman Joined GC & CS
2 3 4 5 6 7 8
1943: Australian Coastwatchers Send Code
1918: "Mohawk" Field Code was issued.
1955: Prototype U-2 Flight
1963: Limited Nuclear Test Ban Treaty
1945: US Dropped Atomic Bomb Over Hiroshima
1944: "The Harvard Mark 1"
1975: Lt Gen Lew Allen Testifies
1987: Death of Joseph Desch - innovative engineer for the National Cash Register Company
1925: Radio Orphan Annie Secret Society
1958: Herbert O. Yardley Died
2008: Georgia-Russia Cyber Attacks
1994: Solomon Kullback Died
9 10 11 12 13 14 15
1945: Nagasaki
1972: Last U.S. Ground Combat Unit Leaves Vietnam
1918: "Allegheny" Field Code was issued.
1944: Spy Velvalee Dickinson Sentenced
1945: Japan Announced Surrender
1942: Hedy Markey (Lamarr) Receives Patent
1981: IBM PC Debut
1982: Navajo Code Talkers Day Declared
16 17 18 19 20 21 22
1858: Early Telegraph Communications
1846: Étienne Bazeries Birth Date
1956: U.S. Navy Recon Plane Shot Down
1907: Abraham Sinkov was born.
23 24 25 26 27 28 29
1948: Stone Board Has First Meeting
1914: Russian Navy Seized Codebooks
1878: Colonel Parker Hitt's Birth Date
1949: Soviets Detonate Atomic Bomb
1778: Beginnings of Culper Spy Ring with GEN Washington & MAJ Tallmadge
Poland and Britain signed the Agreement of Mutual Assistance.
1892: Elizebeth Smith Friedman Birth Date
30 Aug 31 Sep 1 2 3 4 5
1914: German Intercepts of Russian Radio Traffic
Saturday, August 1, 2026
Sunday, August 2, 2026
Monday, August 3, 2026
Tuesday, August 4, 2026
Wednesday, August 5, 2026
Thursday, August 6, 2026
Friday, August 7, 2026
Saturday, August 8, 2026
Sunday, August 9, 2026
Tuesday, August 11, 2026
Wednesday, August 12, 2026
Friday, August 14, 2026
Saturday, August 15, 2026
Sunday, August 16, 2026
Friday, August 21, 2026
Saturday, August 22, 2026
Tuesday, August 25, 2026
Wednesday, August 26, 2026
Thursday, August 27, 2026
Saturday, August 29, 2026
Monday, August 31, 2026

Learn About the Pioneers

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