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"On This Date in History" Calendar

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

May 2021

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S M T W T F S
25 26 27 28 29 Apr 30 May 1
1960: U-2 Recon Plane Shot Down
1943: GC & CS activated Heath Robinson Machine (predecessor to Colossus).
1991: President George H. W. Bush Visited NSA
May 1991: Travis Trophy Presentation
2 3 4 5 6 7 8
1908: American cryptologic pioneer Frank Rowlett was born.
1917: Col. Ralph H. Van Deman becomes military intelligence chief
1942: 29 Navajos Reported to Fort Defiance, AZ
1942: First SIGINTers arrive in Australia
1985: LTG William Odom, USA, became DIRNSA.
1961: President Kennedy creates President's Foreign Intelligence Advisory Board
1945: VE Day
1942: Battle of Coral Sea began.
9 10 11 12 13 14 15
1933: U.S. Senate debates Information Security as government responsibility.
1900: Naval cryptologist Joseph Rochefort was born.
1930: First Japanese linguist, John Hurt, hired by SIS.
1973: Search for government-wide data encryption standard begins.
1927: Elizebeth Friedman - cryptanalyst with Bureau of Prohibition
1975: Cambodian communists captured SS Mayaguez.
1961: Third Radio Research Unit began Army Security Agency service in South Vietnam.
1942: Creation of Women's Army Corps (WAC).
16 17 18 19 20 21 22
1973: Laurance Safford, father of naval cryptology, died.
1985: Electronic Security Command took over USAF COMSEC mission.
1919: DoS approved creation of Cipher Bureau "Black Chamber."
1949: Armed Forces Security Agency created.
1917: William Friedman & Elizebeth Smith married.
1881: Death of Friedrich Wilhelm Kasiski
1987: Iraqi aircraft fired Exocet missiles at USS Stark.
1985: Retired CWO John Walker was arrested for spying.
1940: FDR authorized wiretapping to watch German agents.
1992: VADM Michael McConnell, USN, became DIRNSA.
1965: System Development Corp hosts widescale computer security discussion.
1975: William F. Friedman Auditorium dedicated at NSA.
2010: US Cyber Command established.
23 24 25 26 27 28 29
1975: National Security Council Seeks Secure Voice Network
1844: First telegraph message was sent.
1894: Brigadier John H. Tiltman, only foreign citizen in Cryptologic Hall of Honor was born in London.
1972: SALT Treaty signed.
1962: ASA carried out first Airborne Platform Mission in Vietnam.
1988: German police broke up the "Hannover Hackers."
1885: Cryptologic pioneer Genevieve Young Hitt was born.
Memorial Day Remembrance
2001: al-Qaida member convicted of terrorism in embassy bombings.
30 May 31 Jun 1 2 3 4 5
1933: Rumrunning trial began with case built upon Elizabeth Friedman's cryptanalysis.
Saturday, May 1, 2021
Sunday, May 2, 2021
Monday, May 3, 2021
Tuesday, May 4, 2021
Friday, May 7, 2021
Saturday, May 8, 2021
Monday, May 10, 2021
Wednesday, May 12, 2021
Thursday, May 13, 2021
Saturday, May 15, 2021
Sunday, May 16, 2021
Monday, May 17, 2021
Wednesday, May 19, 2021
Thursday, May 20, 2021
Friday, May 21, 2021
Saturday, May 22, 2021
Sunday, May 23, 2021
Monday, May 24, 2021
Tuesday, May 25, 2021
Wednesday, May 26, 2021
Thursday, May 27, 2021
Friday, May 28, 2021
Saturday, May 29, 2021
Monday, May 31, 2021

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