
The Center for Cryptologic History (CCH) publishes a calendar each year which highlights cryptologic events from the past. The calendar and events for the current month are provided below:

September
1st
1943 First Bombe shipped to Nebraska Ave
1939 Army’s SIS issued first PURPLE translation
1983 KAL 007 shot down by Soviet fighters
2nd
1958 RC-130 shot down while on recon mission, Armenia
1997 Vigilance Park dedicated
1945 Japan formally surrenders
6th
1941 Winston Churchill visited Bletchley Park
11th
1940 Army and Navy signed agreement on joint exploitation of Japanese Purple machine
2001 Terrorists attack World Trade Center and Pentagon
15th
1945 The Signal Security Agency reorganized as the Army Security Agency
16th
1971 Agnes Driscoll, pioneer cryptologist, dies
19th
1956 First civilian deputy director of NSA, Joseph Ream
20th
1983 Rivest, Shamir, and Adlerman received a patent for the encryption algorithm RSA.
24th
1891 William Friedman born, Kishinev, Russia (now Chisinau, Moldova)
26th
1957 Open House for new NSA Headquarters, Ft. Meade
1967 Hubert H. Humphrey visited NSA; first vice-presidential visit
1986 Dedication of Operations Bldgs. 2a and 2b
27th
1940 Purple Analog #1 started decrypting Japanese diplomatic communications
1967 David Kahn’s book The Codebreakers published
29th
1978 USMC turned over responsibility for guarding NSA Fort Meade to Federal Protective Service
30th
1924 Edward Hebern received a patent for an electric coding machine, the first US cipher machine to use a rotor.