DOCID_3575728_SEALED_OK.PDF

Doc ID: 3575728                                      Doc Ref ID: A3117388
Cryptologic Almanac soth Anniversary Series 
VENONA: An Overview 
(U) "Spy catching" is an alluring phrase more often connected with James Bond than with 
a cryptanalyst. However, during the Cold War, a group of cryptanalysts assisted the spy 
catchers in their efforts to stop Soviet espionage in the United States and other allied 
countries. Their decrypts revealed, among other things, the extent of the KGB operations 
in the United States and furthered the FBI's and other agencies' efforts in tracking down 
these spies…

Doc ID: 3575728                                      Doc Ref ID: A3117388
pads produced about 35,000 pages of duplicate key as a result of pressures brought by the 
German advance on Moscow during World War II. The duplicate pages were sent to 
distant entities in an attempt to lessen the impact of this weakness. Although it was 
believed at that time that two deep depths were not exploitable, new techniques were 
invented by the cryptanalysts for this application. While it took another long period of hard 
work, many of the depths created by the manufacturing error were isolated and exploited…

Doc ID: 3575728                                      Doc Ref ID: A3117388
(U) It was because of such recovered information that FBI agent Robert Lamphere became 
the FBI liaison to the project in 1948. Due to the extreme secrecy of the project, VENO NA 
decrypts could be used only to point investigations in the right direction; the FBI was 
forced to gather evidence to convict the Soviet spies from other sources. Yet, in spite of 
this limitation, this early cooperation between SIGINT and law enforcement agencies 
proved quite successful as demonstrated by the capture of spies like Julius and …

Doc ID: 3575728                                      Doc Ref ID: A3117388
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Almanac 50th Anniversary Series 
Last Modified: by nsr 
Last Reviewed: February 28, 2003 
Next Review: 365 days 
DERIVED FROM: MSA/CSS 1\,1.,)NUJIL 123-2. 
DATED: 24 ~ 
1998 
OEa..ASSI FY ON: X 1