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The Venona project was a United States
counterintelligence Counterintelligence (counter-intelligence) or counterespionage (counter-espionage) is any activity aimed at protecting an agency's Intelligence agency, intelligence program from an opposition's intelligence service. It includes gathering informati ...
program initiated during World War II by the United States Army's
Signal Intelligence Service The Signal Intelligence Service (SIS) was the United States Army codebreaking division through World War II. It was founded in 1930 to compile codes for the Army. It was renamed the Signal Security Agency in 1943, and in September 1945, became ...
and later absorbed by the
National Security Agency The National Security Agency (NSA) is an intelligence agency of the United States Department of Defense, under the authority of the director of national intelligence (DNI). The NSA is responsible for global monitoring, collection, and proces ...
(NSA), that ran from February 1, 1943, until October 1, 1980. It was intended to decrypt messages transmitted by the intelligence agencies of the
Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
(e.g. the
NKVD The People's Commissariat for Internal Affairs (, ), abbreviated as NKVD (; ), was the interior ministry and secret police of the Soviet Union from 1934 to 1946. The agency was formed to succeed the Joint State Political Directorate (OGPU) se ...
, the
KGB The Committee for State Security (, ), abbreviated as KGB (, ; ) was the main security agency of the Soviet Union from 1954 to 1991. It was the direct successor of preceding Soviet secret police agencies including the Cheka, Joint State Polit ...
, and the
GRU Gru is a fictional character and the main protagonist of the ''Despicable Me'' film series. Gru or GRU may also refer to: Arts and entertainment * Gru (rapper), Serbian rapper * Gru, an antagonist in '' The Kine Saga'' Organizations Georgia (c ...
). Initiated when the
Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
was an ally of the US, the program continued during the
Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
, when the Soviet Union was considered an enemy. During the 37-year duration of the Venona project, the Signal Intelligence Service decrypted and translated approximately 3,000 messages. The
signals intelligence Signals intelligence (SIGINT) is the act and field of intelligence-gathering by interception of ''signals'', whether communications between people (communications intelligence—abbreviated to COMINT) or from electronic signals not directly u ...
yield included discovery of the Cambridge Five espionage ring in the United Kingdom, and also of Soviet espionage of the
Manhattan Project The Manhattan Project was a research and development program undertaken during World War II to produce the first nuclear weapons. It was led by the United States in collaboration with the United Kingdom and Canada. From 1942 to 1946, the ...
in the US, known as Project Enormous. Some of the espionage was undertaken to support the
Soviet atomic bomb project The Soviet atomic bomb project was authorized by Joseph Stalin in the Soviet Union to develop nuclear weapons during and after World War II. Russian physicist Georgy Flyorov suspected that the Allied powers were secretly developing a " superwea ...
. The Venona project remained secret for more than 15 years after it concluded.


Background

During World War II and the early years of the
Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
, the Venona project was a source of information on Soviet intelligence-gathering directed at the Western military powers. Although unknown to the public, and even to Presidents
Franklin D. Roosevelt Franklin Delano Roosevelt (January 30, 1882April 12, 1945), also known as FDR, was the 32nd president of the United States, serving from 1933 until his death in 1945. He is the longest-serving U.S. president, and the only one to have served ...
and
Harry S. Truman Harry S. Truman (May 8, 1884December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953. As the 34th vice president in 1945, he assumed the presidency upon the death of Franklin D. Roosevelt that year. Subsequen ...
, these programs were of importance concerning crucial events of the early Cold War. These included the
Julius and Ethel Rosenberg Julius Rosenberg (May 12, 1918 – June 19, 1953) and Ethel Rosenberg (born Greenglass; September 28, 1915 – June 19, 1953) were an American married couple who were convicted of First Chief Directorate, spying for the Soviet Union, including ...
spying case (which was based on events during World War II) and the defections of Donald Maclean and Guy Burgess to the
Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
. Most decipherable messages were transmitted and intercepted between 1942 and 1945, during World War II, when the Soviet Union was an ally of the US. Sometime in 1945, the existence of the Venona program was revealed to the Soviet Union by
cryptologist This is a list of cryptographers. Cryptography is the practice and study of techniques for secure communication in the presence of third parties called adversaries. Pre twentieth century * Al-Khalil ibn Ahmad al-Farahidi: wrote a (now lost) book ...
-analyst
Bill Weisband William Weisband, Sr. (August 28, 1908 – May 14, 1967) was a Ukrainian-American Codebreaking, cryptanalyst and NKVD agent (code name 'LINK'), best known for his role in revealing U.S. decryptions of Soviet Union, Soviet diplomatic and intelli ...
, an
NKVD The People's Commissariat for Internal Affairs (, ), abbreviated as NKVD (; ), was the interior ministry and secret police of the Soviet Union from 1934 to 1946. The agency was formed to succeed the Joint State Political Directorate (OGPU) se ...
agent in the US Army's
SIGINT Signals intelligence (SIGINT) is the act and field of intelligence-gathering by interception of ''signals'', whether communications between people (communications intelligence—abbreviated to COMINT) or from electronic signals not directly u ...
. These messages were slowly and gradually decrypted beginning in 1946. This effort continued (many times at a low level of effort in the latter years) through 1980, when the Venona program was terminated. The analyst effort assigned to it was moved to more important projects. To what extent the various individuals referred to in the messages were involved with Soviet intelligence is a topic of minor historical dispute. Most academics and historians have established that most of the individuals mentioned in the Venona decrypts were probably either clandestine assets and/or contacts of Soviet intelligence agents, and very few argue that many of those people probably had no malicious intentions and committed no crimes."Tales from decrypts," ''The Nation'', 28 October 1996, pp. 5–6.


Commencement

The VENONA Project was initiated on February 1, 1943, by Gene Grabeel, an American mathematician and cryptanalyst, under orders from Colonel Carter W. Clarke, Chief of Special Branch of the Military Intelligence Service at that time. Clarke distrusted
Joseph Stalin Joseph Vissarionovich Stalin (born Dzhugashvili; 5 March 1953) was a Soviet politician and revolutionary who led the Soviet Union from 1924 until Death and state funeral of Joseph Stalin, his death in 1953. He held power as General Secret ...
, and feared that the Soviet Union would sign a separate peace with
Nazi Germany Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...
, allowing Germany to focus its military forces against the United Kingdom and the United States. Cryptanalysts of the US Army's Signal Intelligence Service at
Arlington Hall Arlington Hall (also called Arlington Hall Station) is a historic building in Arlington, Virginia. Originally it was a girls' school and later the headquarters of the United States Army's Signal Intelligence Service (SIS) cryptography operations ...
analyzed encrypted high-level Soviet diplomatic intelligence messages intercepted in large volumes during and immediately after World War II by American, British, and Australian listening posts. Frank Rowlett was one of the project leaders.


Decryption

This message traffic, which was encrypted with a
one-time pad The one-time pad (OTP) is an encryption technique that cannot be Cryptanalysis, cracked in cryptography. It requires the use of a single-use pre-shared key that is larger than or equal to the size of the message being sent. In this technique, ...
system, was stored and analyzed in relative secrecy by hundreds of cryptanalysts over a 40-year period starting in the early 1940s. When used correctly, the one-time pad encryption system, which has been used for all the most-secret military and diplomatic communication since the 1930s, is unbreakable. However, due to a serious blunder on the part of the Soviets, some of this traffic was vulnerable to cryptanalysis. The Soviet company that manufactured the one-time pads produced around 35,000 pages of duplicate key numbers, as a result of pressures brought about by the German advance on Moscow during World War II. The duplication—which undermines the security of a one-time system—was discovered, and attempts to lessen its impact were made by sending the duplicates to widely separated users. Despite this, the reuse was detected by cryptanalysts in the US.


Breakthrough

The Soviet systems in general used a
code In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form, sometimes shortened or secret, for communication through a communicati ...
to convert words and letters into numbers, to which additive keys (from one-time pads) were added, encrypting the content. When used correctly one-time pad encryption is unbreakable. However, cryptanalysis by American code-breakers revealed that some of the one-time pad material had incorrectly been reused by the Soviets (specifically, entire pages, although not complete books), which allowed decryption of a small part of the traffic. Generating the one-time pads was a slow and labor-intensive process, and the outbreak of war with Germany in June 1941 caused a sudden increase in the need for coded messages. It is probable that the Soviet code generators started duplicating cipher pages in order to keep up with demand. It was Arlington Hall's Lieutenant Richard Hallock, working on Soviet "Trade" traffic (so called because these messages dealt with Soviet trade issues), who first discovered that the Soviets were reusing pages. Hallock and his colleagues, amongst whom were Genevieve Feinstein, Cecil Phillips, Frank Lewis, Frank Wanat, and Lucille Campbell, went on to break into a significant amount of Trade traffic, recovering many one-time pad additive key tables in the process. A young
Meredith Gardner Meredith Knox Gardner (October 20, 1912August 9, 2002) was an American linguist and codebreaker. Gardner worked in counter-intelligence, decoding Soviet intelligence traffic regarding espionage in the United States, in what came to be known a ...
then used this material to break into what turned out to be NKVD (and later
GRU Gru is a fictional character and the main protagonist of the ''Despicable Me'' film series. Gru or GRU may also refer to: Arts and entertainment * Gru (rapper), Serbian rapper * Gru, an antagonist in '' The Kine Saga'' Organizations Georgia (c ...
) traffic by reconstructing the code used to convert text to numbers. Gardner credits Marie Meyer, a linguist with the
Signal Intelligence Service The Signal Intelligence Service (SIS) was the United States Army codebreaking division through World War II. It was founded in 1930 to compile codes for the Army. It was renamed the Signal Security Agency in 1943, and in September 1945, became ...
with making some of the initial recoveries of the Venona codebook. Samuel Chew and Cecil Phillips also made valuable contributions. On December 20, 1946, Gardner made the first break into the code, revealing the existence of Soviet espionage in the
Manhattan Project The Manhattan Project was a research and development program undertaken during World War II to produce the first nuclear weapons. It was led by the United States in collaboration with the United Kingdom and Canada. From 1942 to 1946, the ...
. Venona messages also indicated that Soviet spies worked in Washington in the
State Department The United States Department of State (DOS), or simply the State Department, is an executive department of the U.S. federal government responsible for the country's foreign policy and relations. Equivalent to the ministry of foreign affairs o ...
,
Treasury A treasury is either *A government department related to finance and taxation, a finance ministry; in a business context, corporate treasury. *A place or location where treasure, such as currency or precious items are kept. These can be ...
,
Office of Strategic Services The Office of Strategic Services (OSS) was the first intelligence agency of the United States, formed during World War II. The OSS was formed as an agency of the Joint Chiefs of Staff (JCS) to coordinate espionage activities behind enemy lines ...
(OSS), and even the
White House The White House is the official residence and workplace of the president of the United States. Located at 1600 Pennsylvania Avenue Northwest (Washington, D.C.), NW in Washington, D.C., it has served as the residence of every U.S. president ...
. Very slowly, using assorted techniques ranging from
traffic analysis Traffic analysis is the process of intercepting and examining messages in order to deduce information from patterns in communication. It can be performed even when the messages are encrypted. In general, the greater the number of messages observ ...
to defector information, more of the messages were decrypted. Claims have been made that information from the physical recovery of code books (a partially burned one was obtained by the Finns) to
bugging A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and ...
embassy rooms in which text was entered into encrypting devices (analyzing the keystrokes by listening to them being punched in) contributed to recovering much of the plaintext. These latter claims are less than fully supported in the open literature. One significant aid (mentioned by the NSA) in the early stages may have been work done in cooperation between the
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
ese and Finnish cryptanalysis organizations;when the Americans broke into Japanese codes during World War II, they gained access to this information. There are also reports that copies of signals purloined from Soviet offices by the
Federal Bureau of Investigation The Federal Bureau of Investigation (FBI) is the domestic Intelligence agency, intelligence and Security agency, security service of the United States and Federal law enforcement in the United States, its principal federal law enforcement ag ...
(FBI) were helpful in the cryptanalysis. The Finnish radio intelligence sold much of its material concerning Soviet codes to the OSS in 1944 during Operation Stella Polaris, including the partially burned code book.


Results

The NSA reported that (according to the serial numbers of the Venona cables) thousands of cables were sent, but only a fraction were available to the cryptanalysts. Approximately 2,200 messages were decrypted and translated; about half of the 1943 GRU-Naval Washington to Moscow messages were broken, but none for any other year, although several thousand were sent between 1941 and 1945. The decryption rate of the NKVD cables was as follows: * 1942: 1.8% * 1943: 15.0% * 1944: 49.0% * 1945: 1.5% Out of some hundreds of thousands of intercepted encrypted texts, it is claimed under 3,000 have been partially or wholly decrypted. All the duplicate one-time pad pages were produced in 1942, and almost all of them had been used by the end of 1945, with a few being used as late as 1948. After this, Soviet message traffic reverted to being completely unreadable. The existence of Venona decryption became known to the Soviets within a few years of the first breaks. It is not clear whether the Soviets knew how much of the message traffic or which messages had been successfully decrypted. At least one Soviet penetration agent, British
Secret Intelligence Service The Secret Intelligence Service (SIS), commonly known as MI6 (MI numbers, Military Intelligence, Section 6), is the foreign intelligence service of the United Kingdom, tasked mainly with the covert overseas collection and analysis of Human i ...
representative to the US
Kim Philby Harold Adrian Russell "Kim" Philby (1 January 191211 May 1988) was a British intelligence officer and a double agent for the Soviet Union. In 1963, he was revealed to be a member of the Cambridge Five, a spy ring that had divulged British secr ...
, was told about the project in 1949, as part of his job as liaison between British and US intelligence. Since all of the duplicate one-time pad pages had been used by this time, the Soviets apparently did not make any changes to their cryptographic procedures after they learned of Venona. However, this information allowed them to alert those of their agents who might be at risk of exposure due to the decryption.


Significance

The decrypted messages gave important insights into Soviet behavior in the period during which duplicate one-time pads were used. With the first break into the code, Venona revealed the existence of Soviet espionage at the Manhattan Project's Site Y (Los Alamos). Identities soon emerged of American, Canadian, Australian, and British spies in service to the Soviet government, including
Klaus Fuchs Klaus Emil Julius Fuchs (29 December 1911 – 28 January 1988) was a German theoretical physicist and atomic spy who supplied information from the American, British, and Canadian Manhattan Project to the Soviet Union during and shortly a ...
, Alan Nunn May, and Donald Maclean. Others worked in Washington in the
State Department The United States Department of State (DOS), or simply the State Department, is an executive department of the U.S. federal government responsible for the country's foreign policy and relations. Equivalent to the ministry of foreign affairs o ...
, the Treasury, OSS, and even the White House. The messages show that the US and other nations were targeted in major espionage campaigns by the Soviet Union as early as 1942. Among those identified are
Julius and Ethel Rosenberg Julius Rosenberg (May 12, 1918 – June 19, 1953) and Ethel Rosenberg (born Greenglass; September 28, 1915 – June 19, 1953) were an American married couple who were convicted of First Chief Directorate, spying for the Soviet Union, including ...
,
Alger Hiss Alger Hiss (November 11, 1904 – November 15, 1996) was an American government official who was accused of espionage in 1948 for the Soviet Union in the 1930s. The statute of limitations had expired for espionage, but he was convicted of perjur ...
,
Harry Dexter White Harry Dexter White (October 29, 1892 – August 16, 1948) was an American government official in the United States Department of the Treasury. Working closely with the secretary of the treasury Henry Morgenthau Jr., he helped set American financia ...
(the second-highest official in the Treasury Department),
Lauchlin Currie Lauchlin Bernard Currie (8 October 1902 – 23 December 1993) was a Canadian economist best known for being President Franklin Roosevelt's chief economic advisor during World War II. After Roosevelt's death, he led the first World Bank survey ...
(a personal aide to Franklin Roosevelt), and Maurice Halperin (a section head in the Office of Strategic Services). The identification of individuals mentioned in Venona transcripts is sometimes problematic, since people with a "covert relationship" with Soviet intelligence are referenced by cryptonyms. Further complicating matters is the fact the same person sometimes had different cryptonyms at different times, and the same cryptonym was sometimes reused for different individuals. In some cases, notably Hiss, the matching of a Venona cryptonym to an individual is disputed. In many other cases, a Venona cryptonym has not yet been linked to any person. According to authors John Earl Haynes and
Harvey Klehr Harvey Elliott Klehr (born December 25, 1945) is a professor of politics and history at Emory University. Klehr is known for his books on the subject of the American Communist movement, and on Soviet espionage in America (many written jointly with ...
, the Venona transcripts identify approximately 349 Americans who they claim had a covert relationship with Soviet intelligence, though fewer than half of these have been matched to real-name identities. However, not every agent may have been communicating directly with Soviet intelligence. Each of those 349 persons may have had many others working for, and reporting only to, them. The OSS, the predecessor to the
Central Intelligence Agency The Central Intelligence Agency (CIA; ) is a civilian foreign intelligence service of the federal government of the United States tasked with advancing national security through collecting and analyzing intelligence from around the world and ...
(CIA), housed at one time or another between fifteen and twenty Soviet spies. Duncan Lee, Donald Wheeler, Jane Foster Zlatowski, and Maurice Halperin passed information to Moscow. The
War Production Board The War Production Board (WPB) was an agency of the United States government that supervised war production during World War II. President Franklin D. Roosevelt established it in January 1942, with Executive Order 9024. The WPB replaced the Su ...
, the Board of Economic Warfare, the
Office of the Coordinator of Inter-American Affairs The Office of the Coordinator of Inter-American Affairs, later known as the Office for Inter-American Affairs, was a United States agency promoting inter-American cooperation (Pan-Americanism) during the 1940s, especially in commercial and econ ...
, and the
Office of War Information The United States Office of War Information (OWI) was a United States government agency created during World War II. The OWI operated from June 1942 until September 1945. Through radio broadcasts, newspapers, posters, photographs, films and other ...
, included at least half a dozen Soviet sources each among their employees.


Black Friday

In late October 1948 the Soviets began changing their ciphers one by one in rapid succession. They also stopped the use of UHF radio links from Germany and Austria to Moscow, using (overhead) landline instead. While Navy investigators thought it was a routine systems upgrade others were not so sure and later it was attributed to two Soviet spies: American William (Bill) Weisband, a linguist at Arlington Hall and British
Kim Philby Harold Adrian Russell "Kim" Philby (1 January 191211 May 1988) was a British intelligence officer and a double agent for the Soviet Union. In 1963, he was revealed to be a member of the Cambridge Five, a spy ring that had divulged British secr ...
in the SIS. At this time some information was trickling in from US intercepts and rare overflights near the East-West border; but with a dearth in intelligence, not even a hint was received of the North Korean attack (approved by Stalin) on South Korea in June 1950. This led to the approval of Operation Gold in Berlin, a joint CIA/ SIS operation to tap into underground telephone cables a short distance across the border in East Berlin; the scheme was based on Operation Silver a British SIS operation in Vienna. Operation Gold was betrayed to the NKVD/ KGB by British SIS member
George Blake George Blake ( Behar; 11 November 1922 – 26 December 2020) was a Espionage, spy with Britain's Secret Intelligence Service (MI6) and worked as a double agent for the Soviet Union. He became a communist and decided to work for the Minist ...
even before it started intercepting in May 1955. But to avoid compromising Blake, it was allowed to continue to April 1956, with knowledge of the project kept inside the NKVD/ KGB.


Bearing of Venona on particular cases

Venona has added information – some unequivocal, some ambiguous – to several espionage cases. Some known spies, including Theodore Hall and
Bill Weisband William Weisband, Sr. (August 28, 1908 – May 14, 1967) was a Ukrainian-American Codebreaking, cryptanalyst and NKVD agent (code name 'LINK'), best known for his role in revealing U.S. decryptions of Soviet Union, Soviet diplomatic and intelli ...
, were neither prosecuted nor publicly implicated, because the Venona evidence against them was withheld.


"19"

The identity of the Soviet source cryptonymed "19" remains unclear. According to British writer Nigel West, "19" was
Edvard Beneš Edvard Beneš (; 28 May 1884 – 3 September 1948) was a Czech politician and statesman who served as the president of Czechoslovakia from 1935 to 1938, and again from 1939 to 1948. During the first six years of his second stint, he led the Czec ...
, president of the
Czechoslovak government-in-exile The Czechoslovak government-in-exile, sometimes styled officially as the Provisional Government of Czechoslovakia (; ), was an informal title conferred upon the Czechoslovak National Liberation Committee (; ), initially by Government of the Unit ...
. Military historian Eduard Mark and American authors Herbert Romerstein and Eric Breindel concluded it was Roosevelt's aide
Harry Hopkins Harold Lloyd Hopkins (August 17, 1890 – January 29, 1946) was an American statesman, public administrator, and presidential advisor. A trusted deputy to President Franklin Delano Roosevelt, Hopkins directed New Deal relief programs before ser ...
. According to American authors John Earl Haynes and Harvey Klehr, "19" could be someone from the British delegation to the Washington Conference in May 1943. Moreover, they argue no evidence of Hopkins as an agent has been found in other archives, and the partial message relating to "19" does not indicate whether this source was a spy. However,
Vasili Mitrokhin Vasili Nikitich Mitrokhin (; March 3, 1922 – January 23, 2004) was an archivist for the Soviet Union's foreign intelligence service, the First Chief Directorate of the KGB, who defected to the United Kingdom in 1992. Mitrokhin first offer ...
was a KGB archivist who defected to the United Kingdom in 1992 with copies of large numbers of KGB files. He claimed Harry Hopkins was a secret Russian agent. Moreover,
Oleg Gordievsky Oleg Antonovich Gordievsky (; 10 October 1938 – 4 March 2025) was a colonel of the KGB who became KGB resident-designate (''rezident'') and bureau chief in London. Gordievsky was a double agent, providing information to the British Secret ...
, a high-level KGB officer who also defected from the Soviet Union, reported that Iskhak Akhmerov, the KGB officer who controlled the clandestine Soviet agents in the US during the war, had said Hopkins was "the most important of all Soviet wartime agents in the United States".
Alexander Vassiliev Alexander Yuryevich Vassiliev (; born 1962) is a Russians, Russian-British people, British journalist, writer and espionage historian living in London who is a Subject-matter expert, subject matter expert in the Soviet KGB and Russian Foreign In ...
's notes identified the source code-named "19" as Laurence Duggan.


Julius and Ethel Rosenberg

Venona has added significant information to the case of Julius and Ethel Rosenberg, making it clear Julius was guilty of espionage, and also showing that Ethel, while not acting as a principal, still acted as an accessory who took part in Julius's espionage activity and played a role in the recruitment of her brother for atomic espionage. Julius and Ethel Rosenberg also had another connection to a recruit for the Soviets named David Greenglass, who was Ethel's brother and Julius's brother-in-law. Venona and other recent information has shown that, while the content of Julius' atomic espionage was not as vital to the Soviets as alleged at the time of his espionage activities, in other fields it was extensive. The information Rosenberg passed to the Soviets concerned the
proximity fuze A Proximity Fuse (also VT fuse or "variable time fuze") is a fuse that detonates an explosive device automatically when it approaches within a certain distance of its target. Proximity fuses are designed for elusive military targets such as air ...
, design and production information on the Lockheed P-80 jet fighter, and thousands of classified reports from Emerson Radio. The Venona evidence indicates unidentified sources code-named "Quantum" and "Pers" who facilitated transfer of nuclear weapons technology to the Soviet Union from positions within the Manhattan Project. According to Alexander Vassiliev's notes from KGB archive, "Quantum" was Boris Podolsky and "Pers" was Russell W. McNutt, an engineer from the uranium processing plant in Oak Ridge.


David Greenglass

David Greenglass, codename KALIBER, was the brother of Ethel Rosenberg, and would be crucial in the conviction of the Rosenbergs. Greenglass was a former Army machinist who worked at Los Alamos. He was originally meant to replace a soldier who had gone AWOL, and lied on his security clearance in order to gain access onto the project. Once Klaus Fuchs was caught, he gave up Harry Gold, who in turn, gave up Greenglass and his wife, as well as his sister and her husband. During their trial, Greenglass changed his story several times. At first, he didn't want to implicate his sister, but when his wife was threatened, he gave up both of them. According to Gerald Markowitz and Michael Meeropol, "In the Rosenberg-Sobell case, the government relied heavily upon the testimony of Greenglass, who pleaded guilty to conspiracy to commit espionage in exchange for a reduced sentence for himself and no indictment or prosecution for his wife, Ruth, who he alleged had aided him in committing espionage. Greenglass testified that he had passed information about the atom bomb to Gold and Rosenberg, who in turn passed it on to the Russians." In the end, Greenglass was sentenced to 15 years but was released in 1960 after serving only nine and a half.


Klaus Fuchs

The Venona decryptions were also important in the exposure of the atomic spy Klaus Fuchs. Some of the earliest messages decrypted concerned information from a scientist at the Manhattan Project, who was referred to by the code names of CHARLES and REST. Fuchs had joined the Manhattan Project at Los Alamos in 1944 where he provided information for the development of a plutonium implosion design. He is also credited with being of great assistance to the creation of a Soviet atomic bomb. Fuchs even gave the Soviets the blueprint for the Trinity device that would be detonated at Los Alamos in July 1945. One such message from Moscow to New York, dated April 10, 1945, called information provided by CHARLES "of great value." Noting that the information included "data on the atomic mass of the nuclear explosive" and "details on the explosive method of actuating" the atomic bomb, the message requested further technical details from CHARLES. Investigations based on the Venona decryptions eventually identified CHARLES and REST as Fuchs in 1949. Fuchs was eventually arrested and tried on March 1, 1950, where he confessed to four counts of espionage and received a maximum prison sentence of fourteen years.


Harry Gold

The Venona decryptions also identified Soviet spy Harry Gold as an agent of the
KGB The Committee for State Security (, ), abbreviated as KGB (, ; ) was the main security agency of the Soviet Union from 1954 to 1991. It was the direct successor of preceding Soviet secret police agencies including the Cheka, Joint State Polit ...
who stole blueprints, industrial formulas, and methods on their behalf from 1935 until ultimately confessing to these actions in 1950. During his years of work under the KGB, Gold operated under the code names GOOSE and ARNOLD. Gold was eager to provide his services after being initially recruited by Thomas Black on behalf of the Amtorg. In 1935, Gold, with the assistance of Black, gained employment at the Pennsylvania Sugar Company, one of the largest producers of sugar in the world at the time. During his tenure, Gold worked under Semyon Semyonov and
Klaus Fuchs Klaus Emil Julius Fuchs (29 December 1911 – 28 January 1988) was a German theoretical physicist and atomic spy who supplied information from the American, British, and Canadian Manhattan Project to the Soviet Union during and shortly a ...
. Over time, Gold began to work with Abraham Brothman, a fellow spy who was identified in Gold's confessions for stealing industrial processes on behalf of the Soviet Union and would later be convicted for lying under oath to a grand jury. Gold's confessions turned out to be a major success for the FBI, as he would unveil a network of spies entrenched in the success of KGB espionage efforts. Along with Brothman, (sentenced to 15 years), David Greenglass, and Julius Rosenberg were all arrested following the interrogations of Gold. With regard to Los Alamos, Fuchs, Greenglass, and Gold all played a role in aiding the Soviet atomic espionage campaign.


Alger Hiss and Harry Dexter White

According to the Moynihan Commission on Government Secrecy, the complicity of both Alger Hiss and Harry Dexter White is conclusively proven by Venona, stating "The complicity of Alger Hiss of the State Department seems settled. As does that of Harry Dexter White of the Treasury Department." In his 1998 book, United States Senator
Daniel Patrick Moynihan Daniel Patrick Moynihan (; March 16, 1927 – March 26, 2003) was an American politician, diplomat and social scientist. A member of the Democratic Party (United States), Democratic Party, he represented New York (state), New York in the ...
expressed certainty about Hiss's identification by Venona as a Soviet spy, writing "Hiss was indeed a Soviet agent and appears to have been regarded by Moscow as its most important."


Donald Maclean and Guy Burgess

Kim Philby Harold Adrian Russell "Kim" Philby (1 January 191211 May 1988) was a British intelligence officer and a double agent for the Soviet Union. In 1963, he was revealed to be a member of the Cambridge Five, a spy ring that had divulged British secr ...
had access to CIA and FBI files, and more damaging, access to Venona Project briefings. When Philby learned of Venona in 1949, he obtained advance warning that his fellow Soviet spy Donald Maclean was in danger of being exposed. The FBI told Philby about an agent cryptonymed "Homer", whose 1945 message to Moscow had been decoded. As it had been sent from New York and had its origins in the British Embassy in Washington, Philby, who would not have known Maclean's cryptonym, deduced the sender's identity. By early 1951, Philby knew US intelligence would soon also conclude Maclean was the sender and advised Moscow to extract Maclean. This led to Maclean and Guy Burgess' flight in May 1951 to Moscow, where they lived the remainder of their lives.


Guy Burgess

Guy Burgess served as a British diplomat during the developing bomb project in the United States. He became a Soviet informant after beginning his studies at the University of Cambridge, where he and his classmates (Kim Philby, Anthony Blunt, and Donald Maclean) began developing ideals against a capitalist society. Burgess began developing connections throughout college as well as his future careers. He would continue to pass on information as a BBC Radio correspondent, an MI6 intelligence officer, and as a member of the British Foreign Office. When the Korean War began, Burgess and Philby passed on information regarding movements in Korea to Moscow. Philby had been working closely with British and American intelligence, and was able to be in proximity to any intelligence findings. When the VENONA Project uncovered Julius Rosenberg (LIBERAL) and his wife Ethel, the project posted that they knew of a British spy with the codename HOMER, which Philby knew to be Maclean. Philby (codename STANLEY) reached out to Burgess to remove Maclean to the Soviet Union. Burgess at this point, was overseas in Washington DC serving in the British Foreign Office, and couldn't do much. In 1950, he was sent back to Britain due to "bad behavior", where he was able to warn Maclean. Burgess knew he was under suspicion by MI5, British counterintelligence, and Scotland Yard's Special Branch. Both Philby and Burgess knew that out of all of the possible people to crack under pressure, Maclean was the easy choice. When Burgess finally convinced Maclean to leave, they fled to Moscow, followed by Philby shortly after.


Soviet espionage in Australia

In addition to British and American operatives, Australians collected Venona intercepts at a remote base in the Australian
Outback The Outback is a remote, vast, sparsely populated area of Australia. The Outback is more remote than Australian bush, the bush. While often envisaged as being arid, the Outback regions extend from the northern to southern Australian coastli ...
. The Soviets remained unaware of this base as late as 1950. The founding of the
Australian Security Intelligence Organisation The Australian Security Intelligence Organisation (ASIO ) is the Intelligence agency, domestic intelligence and national security agency of the Australian Government, responsible for protection from espionage, sabotage, acts of foreign inte ...
(ASIO) by
Labor Labour or labor may refer to: * Childbirth, the delivery of a baby * Labour (human activity), or work ** Manual labour, physical work ** Wage labour, a socioeconomic relationship between a worker and an employer ** Organized labour and the labour ...
Prime Minister A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
Ben Chifley Joseph Benedict Chifley (; 22 September 1885 – 13 June 1951) was an Australian politician and train driver who served as the 16th prime minister of Australia from 1945 to 1949. He held office as the leader of the Labor Party (ALP), and was n ...
in 1949 was considered highly controversial within Chifley's own party. Until then, the
left Left may refer to: Music * ''Left'' (Hope of the States album), 2006 * ''Left'' (Monkey House album), 2016 * ''Left'' (Helmet album), 2023 * "Left", a song by Nickelback from the album ''Curb'', 1996 Direction * Left (direction), the relativ ...
-leaning Australian Labor Party had been hostile to domestic intelligence agencies on civil-liberties grounds and a Labor government founding one seemed a surprising about-face. But the presentation of Venona material to Chifley, revealing evidence of Soviet agents operating in Australia, brought this about. As well as Australian diplomat suspects abroad, Venona had revealed Walter Seddon Clayton (cryptonym "KLOD"), a leading official within the
Communist Party of Australia The Communist Party of Australia (CPA), known as the Australian Communist Party (ACP) from 1944 to 1951, was an Australian communist party founded in 1920. The party existed until roughly 1991, with its membership and influence having been ...
(CPA), as the chief organizer of Soviet intelligence gathering in Australia. Investigation revealed that Clayton formed an underground network within the CPA so that the party could continue to operate if it were banned. In 1950, George Ronald Richards was appointed ASIO's deputy-director of operations for Venona, based in Sydney, charged with investigating intelligence that uncovered the eleven Australians identified in the cables that had been decoded. He continued Venona-related work in London with
MI5 MI5 ( Military Intelligence, Section 5), officially the Security Service, is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence machinery alongside the Secret Intelligence Service (MI6), Gov ...
from November 1952 and went on to lead Operation Cabin 12, the high-profile 1953–1954 defection to Australia of Soviet spy Vladimir Petrov.


Public disclosure

For much of its history, knowledge of Venona was restricted even from the highest levels of government. Senior army officers, in consultation with the FBI and CIA, made the decision to restrict knowledge of Venona within the government (even the CIA was not made an active partner until 1952). Army Chief of Staff
Omar Bradley Omar Nelson Bradley (12 February 1893 – 8 April 1981) was a senior Officer (armed forces), officer of the United States Army during and after World War II, rising to the rank of General of the Army (United States), General of the Army. He wa ...
, concerned about the White House's history of leaking sensitive information, decided to deny President Truman direct knowledge of the project. The president received the substance of the material only through FBI, Justice Department, and CIA reports on counterintelligence and intelligence matters. He was not told the material came from decoded Soviet ciphers. To some degree this secrecy was counter-productive; Truman was distrustful of FBI head
J. Edgar Hoover John Edgar Hoover (January 1, 1895 – May 2, 1972) was an American attorney and law enforcement administrator who served as the fifth and final director of the Bureau of Investigation (BOI) and the first director of the Federal Bureau o ...
and suspected the reports were exaggerated for political purposes. Some of the earliest detailed public knowledge that Soviet code messages from World War II had been broken came with the release of Chapman Pincher's book, ''Too Secret Too Long'', in 1984. Robert Lamphere's book, ''The FBI-KGB War'', was released in 1986. Lamphere had been the FBI liaison to the code-breaking activity and had considerable knowledge of Venona and the
counter-intelligence Counterintelligence (counter-intelligence) or counterespionage (counter-espionage) is any activity aimed at protecting an agency's intelligence program from an opposition's intelligence service. It includes gathering information and conducting ac ...
work that resulted from it. However, the first detailed account of the Venona project, identifying it by name and making clear its long-term implications in post-war espionage, was contained in MI5 assistant director Peter Wright's 1987 memoir, ''
Spycatcher ''Spycatcher: The Candid Autobiography of a Senior Intelligence Officer'' (1987) is a memoir written by Peter Wright, former MI5 officer and assistant director, and co-author Paul Greengrass. Wright drew on his experiences and research into ...
''. Many inside the NSA had argued internally that the time had come to publicly release the details of the Venona project, but it was not until 1995 that the
bipartisan Bipartisanship, sometimes referred to as nonpartisanship, is a political situation, usually in the context of a two-party system (especially those of the United States and some other western countries), in which opposing Political party, politica ...
Commission on Government Secrecy, with Senator Moynihan as chairman, released Venona project materials. Moynihan wrote:
hesecrecy system has systematically denied American historians access to the records of American history. Of late we find ourselves relying on archives of the former Soviet Union in
Moscow Moscow is the Capital city, capital and List of cities and towns in Russia by population, largest city of Russia, standing on the Moskva (river), Moskva River in Central Russia. It has a population estimated at over 13 million residents with ...
to resolve questions of what was going on in Washington at mid-century. ... the Venona intercepts contained overwhelming proof of the activities of Soviet spy networks in America, complete with names, dates, places, and deeds.
One of the considerations in releasing Venona translations was the privacy interests of the individuals mentioned, referenced, or identified in the translations. Some names were not released because to do so would constitute an invasion of privacy. However, in at least one case, independent researchers identified one of the subjects whose name had been obscured by the NSA. The dearth of reliable information available to the public—or even to the President and Congress—may have helped to polarize debates of the 1950s over the extent and danger of Soviet espionage in the United States.
Anti-Communists Anti-communism is Political movement, political and Ideology, ideological opposition to communism, communist beliefs, groups, and individuals. Organized anti-communism developed after the 1917 October Revolution in Russia, and it reached global ...
suspected many spies remained at large, perhaps including some known to the government. Those who criticized the governmental and non-governmental efforts to root out and expose Communists in the United States felt these efforts were an overreaction (in addition to other reservations about
McCarthyism McCarthyism is a political practice defined by the political repression and persecution of left-wing individuals and a Fear mongering, campaign spreading fear of communist and Soviet influence on American institutions and of Soviet espionage i ...
). Public access—or broader governmental access—to the Venona evidence would certainly have affected this debate, as it is affecting the retrospective debate among historians and others now. As the Moynihan Commission wrote in its final report:
A balanced history of this period is now beginning to appear; the Venona messages will surely supply a great cache of facts to bring the matter to some closure. But at the time, the American Government, much less the American public, was confronted with possibilities and charges, at once baffling and terrifying.
The
National Cryptologic Museum The National Cryptologic Museum (NCM) is an American museum of cryptologic history that is affiliated with the National Security Agency (NSA). The first public museum in the U.S. Intelligence Community, NCM is located in the former Colony Sev ...
features an exhibit on the Venona project in its "Cold War/Information Age" gallery.


Texas textbook controversy

Controversy arose in 2009 over the Texas State Board of Education's revision of their high school history class curricula to suggest Venona shows Senator
Joseph McCarthy Joseph Raymond McCarthy (November 14, 1908 – May 2, 1957) was an American politician who served as a Republican Party (United States), Republican United States Senate, U.S. Senator from the state of Wisconsin from 1947 until his death at age ...
to have been justified in his zeal in exposing those whom he believed to be Soviet spies or communist sympathizers. Critics such as Emory University history professor Harvey Klehr assert most people and organizations identified by McCarthy, such as those brought forward in the Army-McCarthy hearings or rival politicians in the Democratic party, were not mentioned in the Venona content and that his accusations remain largely unsupported by evidence.


Critical views

The majority of historians are convinced of the historical value of the Venona material. Intelligence historian Nigel West believes that "Venona remain an irrefutable resource, far more reliable than the mercurial recollections of KGB defectors and the dubious conclusions drawn by paranoid analysts mesmerized by Machiavellian plots." However, a number of writers and scholars have taken a critical view of the translations. They question the accuracy of the translations and the identifications of cryptonyms that the NSA translations give. Writers Walter and Miriam Schneir, in a lengthy 1999 review of one of the first book-length studies of the messages, object to what they see as the book's overconfidence in the translations' accuracy, noting that the undecrypted gaps in the texts can make interpretation difficult, and emphasizing the problem of identifying the individuals mentioned under cryptonyms. To support their critique, they cite a declassified memorandum, written in 1956 by A. H. Belmont, who was assistant to FBI director J. Edgar Hoover at the time. In the memo, Belmont discusses the possibility of using the Venona translations in court to prosecute Soviet agents and comes out strongly opposed to their use. His reasons include legal uncertainties about the admissibility of the translations as evidence, and the difficulties that prosecution would face in supporting the validity of the translations. Belmont highlights the uncertainties in the translation process, noting that the cryptographers have indicated that "almost anything included in a translation of one of these deciphered messages may in the future be radically revised." He also notes the complexities of identifying people with cryptonyms, describing how the personal details mentioned for cryptonym "Antenna" fit more than one person, and the investigative process required to finally connect "Antenna" to Julius Rosenberg. The Schneirs conclude that "A reader faced with Venona's incomplete, disjointed messages can easily arrive at a badly skewed impression." Many of the critiques of the Venona translations have been based on specific cases. The Schneirs' critique of the Venona documents was based on their decades of work on the case of Ethel and Julius Rosenberg. Another critique of the Venona translations came from the late Rutgers University law professor John Lowenthal, who as a law student worked as a volunteer for Alger Hiss's defense team, and later wrote extensively on the Hiss case. Lowenthal's critique focused on one message (Venona 1822 KGB Washington-Moscow 30 March 1945), in which the comments identified the cryptonym 'Ales' as "probably Alger Hiss." Lowenthal raised a number of objections to this identification, rejecting it as "a conclusion psychologically motivated and politically correct but factually wrong." Lowenthal's article led to an extended debate on the 'Ales' message, and even prompted the NSA to declassify the original Russian text. Currently, Venona 1822 is the only message for which the complete decrypted Russian text has been published. Victor Navasky, editor and publisher of ''
The Nation ''The Nation'' is a progressive American monthly magazine that covers political and cultural news, opinion, and analysis. It was founded on July 6, 1865, as a successor to William Lloyd Garrison's '' The Liberator'', an abolitionist newspaper ...
'', has also written several editorials highly critical of Haynes' and Klehr's interpretation of recent work on the subject of Soviet espionage. Navasky claims the Venona material is being used to "distort ... our understanding of the cold war" and that the files are potential "time bombs of misinformation." Commenting on the list of 349 Americans identified by Venona, published in an appendix to ''Venona: Decoding Soviet Espionage in America'', Navasky wrote, "The reader is left with the implication—unfair and unproven—that every name on the list was involved in espionage, and as a result, otherwise careful historians and mainstream journalists now routinely refer to Venona as proof that many hundreds of Americans were part of the red spy network." Navasky goes further in his defense of the listed people and has claimed a great deal of the so-called espionage that went on was nothing more than "exchanges of information among people of good will" and that "most of these exchanges were innocent and were within the law." According to historian Ellen Schrecker, "Because they offer insights into the world of the secret police on both sides of the
Iron Curtain The Iron Curtain was the political and physical boundary dividing Europe into two separate areas from the end of World War II in 1945 until the end of the Cold War in 1991. On the east side of the Iron Curtain were countries connected to the So ...
, it is tempting to treat the FBI and Venona materials less critically than documents from more accessible sources. But there are too many gaps in the record to use these materials with complete confidence." Schrecker believes the documents established the guilt of many prominent figures but is still critical of the views of scholars such as Haynes, arguing, "complexity, nuance, and a willingness to see the world in other than black and white seem alien to Haynes' view of history."


See also

* Elizabeth Bentley * History of Soviet and Russian espionage in the United States * List of Americans in the Venona papers * List of Soviet agents in the United States * Russian State Archive of Socio-Political History


Notes


References and further reading


Books

* * * * * * * * * * * * * * * * * *


Online sources

*
Venona PDFs, arranged by date
(NSA) * * * * * * * ** * * *


External links


Venona Documents – National Security Agency
{{Soviet Union–United States relations, state=collapsed Cold War espionage Cold War intelligence operations Espionage projects History of cryptography National Security Agency Soviet Union–United Kingdom military relations Soviet Union–United States military relations Spy rings