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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.

December 2031

This Month

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Nov 30	Dec 1	2	3	4	5	6
	1887: U.S. Navy began using "The U.S. Navy Secret Code"
	1932: Polish Cipher Bureau Success!
	1950: ATLAS became operational.

7	8	9	10	11	12	13
Pearl Harbor Day		1992: Premiere of William Gibson's "Agrippa"	1815: Birth of Ms. Ada Lovelace, the world's first computer programmer	1941: Germany and Italy Declared War on the U.S.
		1906: Birth of Grace Hopper - computer pioneer and U.S. Navy Rear Admiral

14	15	16	17	18	19	20
1977: Filing for RSA Patent	1562: Death of Johannes Trithemius	1972: NSOC Inaugurated	OTD in 1993: National Cryptologic Museum Opened to the Public	2013: Death of Dr. Lowell K. "Jim" Frazer	1801: Patterson's "Perfect Cipher" Letter sent to Thomas Jefferson	1881: First telephone ciphony device invented by James Harris Rodgers.
1958: First NSA Holiday Party.						20 Dec 1969: Anniversary of the Capture of North Vietnamese Notebooks
						1946: Meredith Gardner broke into KGB message re: Manhattan Project.

21	22	23	24	25	26	27
	1961: SP4 James Davis - first American cryptologist killed in Vietnam.	1968: "Pueblo" crew released by North Korea.	1928: Friedman's Coded Holiday Gram	Holiday Season Memories - NSA Building Messages		1948: Stone Board report on centralizing U.S. cryptologic organizations was issued.
	2001: Shoe-bomber Richard Reid arrested.