The U.S. Army's Signal Intelligence Service, the precursor to the National Security Agency, began a secret program in February 1943 later codenamed VENONA

The mission of this small program was to examine and exploit Soviet diplomatic communications but after the program began, the message traffic included espionage efforts as well.

Although it took almost two years before American cryptologists were able to break the KGB encryption, the information gained through these transactions provided U.S. leadership insight into Soviet intentions and treasonous activities of government employees until the program was canceled in 1980.

The VENONA files are most famous for exposing Julius (code named LIBERAL) and Ethel Rosenberg and help give indisputable evidence of their involvement with the Soviet spy ring.

The first of six public releases of translated VENONA messages was made in July 1995 and included 49 messages about the Soviets' efforts to gain information on the U.S. atomic bomb research and the Manhattan Project. Over the course of five more releases, all of the approximately 3,000 VENONA translations were made public.

 9NOV_MILLER.PDFThe work of KGB agent James W. Miller. The local Communist Party vouches for him. 9 November 1943 (Release 4)
 16APR_COVERNAME_PROFESSOR.PDFThe work of covername PROFESSOR and MAP 16 April (Release 4)
 1JUN_ELIZABETH_KUZNETSOVA.PDFThe whereabouts of various deserters, including Elizabeth Kuznetsova 1 June (Release 4)
 26JUN_WALTER_SCOTT_AFFAIR.PDFThe Walter Scott affair
 19MAR_BRUSOV.PDFThe unidentified KGB agent BRUSOV has passed on information about the B-25J. Also, Leo Levanas has asked how he can be useful to the KGB
 6SEP_FARLEY.PDFThe unidentified FARLEY and agent Joseph M. Bernstein 6 September 1943 (Release 4)
 13JUL_SYNTHETIC_RUBBER.PDFThe U.S. synthetic rubber industry 13 July 1943 (Release 4)
 10AUG_CREWS_INTERROGATED.PDFThe U.S. Director of Naval Intelligence explains why Soviet crews are being interrogated and ships searched 10 August 1943 (Release 4)
 5APR_SOVIET_SHIPS.PDFThe two Soviet ships off West Coast in hopeless condition. One person drowned. 5 April 1943 (Release 4)
 23JAN_TRANSIT_VISA_OP.PDFThe Transit Visa Operation
 24JUN_SOVIET_SHIP_ILICH_SUNK.PDFThe Soviet ship "Ilich" has sunk in Portland. KGB is investigating
 3MAY_SOVIET_MILITARY_ATTACHE.PDFThe Soviet military attache discusses persons on his staff 3 May 1943 (Release 4)
 30MAR_DESERTER.PDFThe search for the deserter Elizabeth Kuznetsova continues
 16MAY_DEFECTOR.PDFThe search for Soviet defector Kravchenko continues
 7APR_MOLCHANOV.PDFThe reserved nature of MOLChANOV 7 April 1943 (Release 5)
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