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"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 2031

This Month

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26	27	28	29	30	Jan 31	Feb 1
						1942: German Navy introduced 4-rotor Enigma
						1942: FRUMEL established to assist General MacArthur
						1949: USAFSS received first cryptologic units from the ASA.
						1943: SIS began Venona Project

2	3	5	6	7	8
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.	1919: Lt. William Friedman left AEF G6A2 to return to U.S.	1587: Mary, Queen of Scots, executed for treason.
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.	1943: Naval Security Station moved to Nebraska Ave.	1941: First Americans visit Bletchley Park.
		1973: EC-47 with the callsign Baron-52 shot down over Laos		1960: Inventor Gilbert Vernam died.
		1969: USAF EC-47: CAP 72 lost in Vietnam		1930: David Kahn, noted cryptologic historian was born.

9	10	11	14	15
1926: Enigma introduced into German Navy as Radio Key C.	1952: Inventor Edward Hebern died.	Inventors' Day & the Wadsworth Cipher	Sweetheart Codes	President's Month OTD - DEC Alpha
	1962: Gary Francis Powers was Released After Spending 21 Months in a Soviet Prison.			1946: The ENIAC computer begins operating.
	1943: Establishment of the 805th Signal Service Company for operation of the SIGSALY.

16	17	18	19	20	21	22
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	1777: Benedict Arnold overlooked for promotion.	1996: Memorial Wall in OPS2B (at NSA) was dedicated.
1976: "Village Voice" Published Full Pike Report	1972: NSCID 6 established CSS.				1846: Sarah G. Bagley became first female telegrapher.

23	24	25	26	Feb 28
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.	1917: President Wilson was informed of the contents of the Zimmermann telegram.
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.

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."

All Day

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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Cryptologic History

February 2031

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