Cryptologic Dates in History Calendar

"On This Date in Cryptologic History" Calendar

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

February 2027

This Month

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Jan 31	Feb 1	2	3	4	5	6
	1942: German Navy introduced 4-rotor Enigma	1962: Air Force Security Service began operations in South Vietnam	1945: Truck lost at Colmar, France causes theater-wide search		2010: Peter Calvocoressi died.	1802: Sir Charles Wheatstone, cipher inventor, born.
	1942: FRUMEL established to assist General MacArthur	1462: Birthday of Johannes Trithemius	1963: Intercept operations began at Phu Bai		1944: Colossus activated by Bletchley Park.	1963: Genevieve Young Hitt, early U.S. female cryptologist, born in 1885 and died on 6 Feb 1963.
	1949: USAFSS received first cryptologic units from the ASA.				1973: EC-47 with the callsign Baron-52 shot down over Laos
	1943: SIS began Venona Project				1969: USAF EC-47: CAP 72 lost in Vietnam

7	8	9	10	11	12	13
1919: Lt. William Friedman left AEF G6A2 to return to U.S.	1587: Mary, Queen of Scots, executed for treason.	1926: Enigma introduced into German Navy as Radio Key C.	1952: Inventor Edward Hebern died.	Inventors' Day & the Wadsworth Cipher
1943: Naval Security Station moved to Nebraska Ave.	1941: First Americans visit Bletchley Park.		1962: Gary Francis Powers was Released After Spending 21 Months in a Soviet Prison.
1960: Inventor Gilbert Vernam died.			1943: Establishment of the 805th Signal Service Company for operation of the SIGSALY.
1930: David Kahn, noted cryptologic historian was born.

14	15	16	17	18	19	20
Sweetheart Codes	President's Month OTD - DEC Alpha	1973: Ribbon-cutting for National SIGINT Operations Center (NSOC)	1960: Howard Engstrom - Exceptional Service	1933: Government seizure of cryptologist Herbert Yardley's "Japanese Diplomatic Secrets."		1939: Japanese first use of PURPLE
	1946: The ENIAC computer begins operating.	1976: "Village Voice" Published Full Pike Report	1972: NSCID 6 established CSS.

21	22	23	24	25	26	27
1777: Benedict Arnold overlooked for promotion.	1996: Memorial Wall in OPS2B (at NSA) was dedicated.	1927: Radio Act of 1927.	2001: Claude Shannon, cryptologic pioneer, died.	1863: US govt took control of commercial telegraphs during Civil War.	1881: Joseph Mauborgne, code & cipher expert, was born.
1846: Sarah G. Bagley became first female telegrapher.		1932: Boris Hagelin receives first cryptographic patent.	1954: First NSA Historian - CAPT Thomas Dyer, USN		1981: NSA sponsored exhibit opened at Smithsonian.
		1996: Lt Gen Kenneth Minihan, USAF, became DIRNSA.

Feb 28	Mar 1	2	3	4	5	6
1917: President Wilson was informed of the contents of the Zimmermann telegram.

1802: Sir Charles Wheatstone, cipher inventor, born.

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1963: Genevieve Young Hitt, early U.S. female cryptologist, born in 1885 and died on 6 Feb 1963.

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1926: Enigma introduced into German Navy as Radio Key C.

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Inventors' Day & the Wadsworth Cipher

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Sweetheart Codes

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1933: Government seizure of cryptologist Herbert Yardley's "Japanese Diplomatic Secrets."

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1939: Japanese first use of PURPLE

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1996: Memorial Wall in OPS2B (at NSA) was dedicated.

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1863: US govt took control of commercial telegraphs during Civil War.

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1917: President Wilson was informed of the contents of the Zimmermann telegram.

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