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.

 8AUG_SALLY.PDFThe Illegal SALLY 8 August 1943 (Release 4)
 19MAY_SALLY.PDFThe Illegal SALLY 19 May 1943 (Release 4)
 19JUN_SALLY.PDFThe Illegal SALLY 19 June 1943 (Release 4)
 14MAY_SALLY.PDFThe Illegal SALLY 14 May 1943 (Release 4)
 20MAR_SALLY.PDFThe illegal SALLY (here seen as AUSTRALIAN WOMAN) 20 March 1943 (Release 4)
 12MAY_SALLY.PDFThe Illegal SALLY (here given as AUSTRALIAN WOMAN) 12 May 1943 (Release 4)
 8APR_SALLY.PDFThe Illegal SALLY (here AUSTRALIAN WOMAN) & other operational matters 8 April 1943 (Release 4)
 16APR_HUNT_FOR_DESERTER.PDFThe hunt for the deserter Kuznetsova continues. She is reported to be in a hospital in Portland 16 April (Release 4)
 27MAY_SOVIET_ADMIRAL_GRIEF.PDFThe grief of a Soviet admiral - his comrades must send telegraphs of sympathy 27 May 1943 (Release 4)
 22AUG_GNOME_CASE.PDFThe GNOME case and references to Caridad Mercader (KLAVA) 22 August (Release 4)
 2MAR_GNOME_AFFAIR.PDFThe GNOME affair. Mexico KGB to expedite Caridad Mercader's departure to Cuba 2 March (Release 4)
 25APR_TERRY1.PDFThe French Communist Simone Terry
 26JAN_R_FAMILY.PDFThe family of "R"
 5MAR_WIRELESS_COMMS.PDFThe establishing of GEORG's and OLAV's wireless communications with Moscow 5 March 1943 (Release 5)
 7NOV_ELIZABETH_KUZNETSOVA.PDFThe deserter Elizabeth Kuznetsova was shipped off to Vladivostok on 4 Nov 7 November (Release 4)
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