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.

 21SEP_CONVOYS.PDFSoviet convoys en route to Iceland 21 September 1943 (Release 4)
 19SEP_CONVOYS.PDFSoviet convoys 19 September 1943 (Release 4)
 16SEP_CONVOYS.PDFSoviet convoys 16 September 1943 (Release 4)
 6OCT_CONVOY.PDFSoviet convoy arrives in Iceland 6 October 1943 (Release 4)
 7OCT_CONVOY_SERVICE.PDFSoviet convoy 7 October 1943 (Release 4)
 29OCT_CONVOY.PDFSoviet convoy 29 October 1943 (Release 4)
 24OCT_CONVOY.PDFSoviet convoy 24 October 1943 (Release 4)
 5JUL_ITALY.PDFSoviet Citizens in Italy
 24MAY_CIPHER_OFFICE.PDFSoviet cipher office in Los Angeles
 26SEP_BEAVERBROOK.PDFSoviet Ambassador's information from BEAVERBROOK; and German bombing of London
 23SEP_BEAVERBROOK.PDFSoviet Ambassador's information from BEAVERBROOK; and German bombing of London
 22OCT_SOVIET_AMBASSADOR.PDFSoviet ambassador meets with Secretary of State 22 October 1943 (Release 4)
 25JAN_SOVIET_ACQ.PDFSoviet acquisition of Polish cipher telegram
 3APR_SHIP_CAPTAIN.PDFSomething about a Soviet ship's captain
 24NOV_MISSED_MTG.PDFSomeone missed a meeting 24 November (Release 4)
Page 20 of 100