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Government Communications Headquarters, commonly known as GCHQ, is an
intelligence Intelligence has been defined in many ways: the capacity for abstraction, logic, understanding, self-awareness, learning, emotional knowledge, reasoning, planning, creativity, critical thinking, and problem-solving. More generally, it can ...
and
security" \n\n\nsecurity.txt is a proposed standard for websites' security information that is meant to allow security researchers to easily report security vulnerabilities. The standard prescribes a text file called \"security.txt\" in the well known locat ...
organisation responsible for providing
signals intelligence Signals intelligence (SIGINT) is intelligence-gathering by interception of '' signals'', whether communications between people (communications intelligence—abbreviated to COMINT) or from electronic signals not directly used in communication ...
(SIGINT) and information assurance (IA) to the
government A government is the system or group of people governing an organized community, generally a state. In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government i ...
and
armed forces A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct ...
of the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and ...
. Primarily based at " The Doughnut" in the suburbs of
Cheltenham Cheltenham (), also known as Cheltenham Spa, is a spa town and borough on the edge of the Cotswolds in the county of Gloucestershire, England. Cheltenham became known as a health and holiday spa town resort, following the discovery of mineral s ...
, GCHQ is the responsibility of the country's
Secretary of State for Foreign and Commonwealth Affairs The secretary of state for foreign, Commonwealth and development affairs, known as the foreign secretary, is a minister of the Crown of the Government of the United Kingdom and head of the Foreign, Commonwealth and Development Office. Seen as ...
(Foreign Secretary), but it is not a part of the
Foreign Office Foreign may refer to: Government * Foreign policy, how a country interacts with other countries * Ministry of Foreign Affairs, in many countries ** Foreign Office, a department of the UK government ** Foreign office and foreign minister * Unit ...
and its Director ranks as a Permanent Secretary. GCHQ was originally established after the
First World War World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
as the Government Code and Cypher School (GC&CS) and was known under that name until 1946. During the
Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposi ...
it was located at
Bletchley Park Bletchley Park is an English country house and estate in Bletchley, Milton Keynes (Buckinghamshire) that became the principal centre of Allied code-breaking during the Second World War. The mansion was constructed during the years following ...
, where it was responsible for breaking the German Enigma codes. There are two main components of the GCHQ, the Composite Signals Organisation (CSO), which is responsible for gathering information, and the National Cyber Security Centre (NCSC), which is responsible for securing the UK's own communications. The Joint Technical Language Service (JTLS) is a small department and cross-government resource responsible for mainly technical language support and translation and interpreting services across government departments. It is co-located with GCHQ for administrative purposes. In 2013, GCHQ received considerable media attention when the former
National Security Agency The National Security Agency (NSA) is a national-level 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, collecti ...
contractor
Edward Snowden Edward Joseph Snowden (born June 21, 1983) is an American and naturalized Russian former computer intelligence consultant who leaked highly classified information from the National Security Agency (NSA) in 2013, when he was an employee and su ...
revealed that the agency was in the process of collecting all online and telephone data in the UK via the Tempora programme. Snowden's revelations began a spate of ongoing disclosures of global surveillance. ''
The Guardian ''The Guardian'' is a British daily newspaper. It was founded in 1821 as ''The Manchester Guardian'', and changed its name in 1959. Along with its sister papers '' The Observer'' and '' The Guardian Weekly'', ''The Guardian'' is part of the ...
'' newspaper was forced to destroy computer hard drives with the files Snowden had given them because of the threats of a lawsuit under the Official Secrets Act.


Structure

GCHQ is led by the Director of GCHQ, Jeremy Fleming, and a Corporate Board, made up of executive and non-executive directors. Reporting to the Corporate Board are:(secondary) : *Sigint missions: comprising maths and
cryptanalysis Cryptanalysis (from the Greek ''kryptós'', "hidden", and ''analýein'', "to analyze") refers to the process of analyzing information systems in order to understand hidden aspects of the systems. Cryptanalysis is used to breach cryptographic s ...
, IT and computer systems, linguistics and translation, and the intelligence analysis unit *Enterprise: comprising applied research and emerging technologies, corporate knowledge and information systems, commercial supplier relationships, and
biometrics Biometrics are body measurements and calculations related to human characteristics. Biometric authentication (or realistic authentication) is used in computer science as a form of identification and access control. It is also used to identify i ...
*Corporate management: enterprise resource planning,
human resources Human resources (HR) is the set of people who make up the workforce of an organization, business sector, industry, or economy. A narrower concept is human capital, the knowledge and skills which the individuals command. Similar terms includ ...
, internal audit, and architecture *National Cyber Security Centre (NCSC).Ferris (2020)


History


Government Code and Cypher School (GC&CS)

During the First World War, the
British Army The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gurkha ...
and
Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against Fr ...
had separate signals intelligence agencies, MI1b and NID25 (initially known as Room 40) respectively. In 1919, the Cabinet's Secret Service Committee, chaired by
Lord Curzon George Nathaniel Curzon, 1st Marquess Curzon of Kedleston, (11 January 1859 – 20 March 1925), styled Lord Curzon of Kedleston between 1898 and 1911 and then Earl Curzon of Kedleston between 1911 and 1921, was a British Conservative statesman ...
, recommended that a peacetime codebreaking agency should be created, a task which was given to the Director of Naval Intelligence, Hugh Sinclair.Johnson, 1997, p. 44 Sinclair merged staff from NID25 and MI1b into the new organisation, which initially consisted of around 25–30 officers and a similar number of clerical staff. It was titled the "Government Code and Cypher School" (GC&CS), a cover-name which was chosen by Victor Forbes of the
Foreign Office Foreign may refer to: Government * Foreign policy, how a country interacts with other countries * Ministry of Foreign Affairs, in many countries ** Foreign Office, a department of the UK government ** Foreign office and foreign minister * Unit ...
. Alastair Denniston, who had been a member of NID25, was appointed as its operational head. It was initially under the control of the
Admiralty Admiralty most often refers to: *Admiralty, Hong Kong *Admiralty (United Kingdom), military department in command of the Royal Navy from 1707 to 1964 *The rank of admiral *Admiralty law Admiralty can also refer to: Buildings * Admiralty, Traf ...
and located in Watergate House, Adelphi, London. Its public function was "to advise as to the security of codes and cyphers used by all Government departments and to assist in their provision", but also had a secret directive to "study the methods of cypher communications used by foreign powers". GC&CS officially formed on 1 November 1919, and produced its first decrypt prior to that date, on 19 October. Before the Second World War, GC&CS was a relatively small department. By 1922, the main focus of GC&CS was on diplomatic traffic, with "no service traffic ever worth circulating" and so, at the initiative of Lord Curzon, it was transferred from the Admiralty to the
Foreign Office Foreign may refer to: Government * Foreign policy, how a country interacts with other countries * Ministry of Foreign Affairs, in many countries ** Foreign Office, a department of the UK government ** Foreign office and foreign minister * Unit ...
. GC&CS came under the supervision of Hugh Sinclair, who by 1923 was both the Chief of SIS and Director of GC&CS. In 1925, both organisations were co-located on different floors of Broadway Buildings, opposite
St. James's Park St James's Park is a park in the City of Westminster, central London. It is at the southernmost tip of the St James's area, which was named after a leper hospital dedicated to St James the Less. It is the most easterly of a near-continuous ch ...
. Messages decrypted by GC&CS were distributed in blue-jacketed files that became known as "BJs". In the 1920s, GC&CS was successfully reading Soviet Union diplomatic cyphers. However, in May 1927, during a row over clandestine Soviet support for the
General Strike A general strike refers to a strike action in which participants cease all economic activity, such as working, to strengthen the bargaining position of a trade union or achieve a common social or political goal. They are organised by large coa ...
and the distribution of subversive propaganda, Prime Minister
Stanley Baldwin Stanley Baldwin, 1st Earl Baldwin of Bewdley, (3 August 186714 December 1947) was a British Conservative Party politician who dominated the government of the United Kingdom between the world wars, serving as prime minister on three occasions, ...
made details from the decrypts public. During the Second World War, GC&CS was based largely at
Bletchley Park Bletchley Park is an English country house and estate in Bletchley, Milton Keynes (Buckinghamshire) that became the principal centre of Allied code-breaking during the Second World War. The mansion was constructed during the years following ...
, in present-day
Milton Keynes Milton Keynes ( ) is a city and the largest settlement in Buckinghamshire, England, about north-west of London. At the 2021 Census, the population of its urban area was over . The River Great Ouse forms its northern boundary; a tributary ...
, working on understanding the German Enigma machine and
Lorenz cipher The Lorenz SZ40, SZ42a and SZ42b were German rotor stream cipher machines used by the German Army during World War II. They were developed by C. Lorenz AG in Berlin. The model name ''SZ'' was derived from ''Schlüssel-Zusatz'', meaning ''cipher ...
s. In 1940, GC&CS was working on the diplomatic codes and ciphers of 26 countries, tackling over 150 diplomatic cryptosystems. Senior staff included Alastair Denniston, Oliver Strachey, Dilly Knox,
John Tiltman Brigadier John Hessell Tiltman, (25 May 1894 – 10 August 1982) was a British Army officer who worked in intelligence, often at or with the Government Code and Cypher School (GC&CS) starting in the 1920s. His intelligence work was largely conn ...
, Edward Travis, Ernst Fetterlein, Josh Cooper,
Donald Michie Donald Michie (; 11 November 1923 – 7 July 2007) was a British researcher in artificial intelligence. During World War II, Michie worked for the Government Code and Cypher School at Bletchley Park, contributing to the effort to solve " Tunny ...
,
Alan Turing Alan Mathison Turing (; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher, and theoretical biologist. Turing was highly influential in the development of theoretical ...
, Gordon Welchman,
Joan Clarke Joan Elisabeth Lowther Murray, MBE (''née'' Clarke; 24 June 1917 – 4 September 1996) was an English cryptanalyst and numismatist best known for her work as a code-breaker at Bletchley Park during the Second World War. Although she did no ...
, Max Newman,
William Tutte William Thomas Tutte OC FRS FRSC (; 14 May 1917 – 2 May 2002) was an English and Canadian codebreaker and mathematician. During the Second World War, he made a brilliant and fundamental advance in cryptanalysis of the Lorenz cipher, a majo ...
, I. J. (Jack) Good, Peter Calvocoressi and Hugh Foss. An outstation in the Far East, the Far East Combined Bureau was set up in Hong Kong in 1935 and moved to Singapore in 1939. Subsequently, with the Japanese advance down the Malay Peninsula, the Army and RAF codebreakers went to the Wireless Experimental Centre in Delhi, India. The Navy codebreakers in FECB went to
Colombo Colombo ( ; si, කොළඹ, translit=Koḷam̆ba, ; ta, கொழும்பு, translit=Koḻumpu, ) is the executive and judicial capital and largest city of Sri Lanka by population. According to the Brookings Institution, Colombo me ...
, Ceylon, then to Kilindini, near
Mombasa Mombasa ( ; ) is a coastal city in southeastern Kenya along the Indian Ocean. It was the first capital of the British East Africa, before Nairobi was elevated to capital city status. It now serves as the capital of Mombasa County. The town ...
, Kenya.


Post Second World War

GC&CS was renamed the Government Communications Headquarters (GCHQ) in June 1946. The organisation was at first based in Eastcote in northwest London, then in 1951 moved to the outskirts of
Cheltenham Cheltenham (), also known as Cheltenham Spa, is a spa town and borough on the edge of the Cotswolds in the county of Gloucestershire, England. Cheltenham became known as a health and holiday spa town resort, following the discovery of mineral s ...
, setting up two sites at Oakley and
Benhall Benhall is a village and civil parish in the East Suffolk district of Suffolk, England. Located to the south of Saxmundham, in 2007 its population was estimated to be 560, reducing to 521 at the 2011 Census. Geography Benhall is split into ...
. One of the major reasons for selecting Cheltenham was that the town had been the location of the headquarters of the
United States Army Services of Supply The Services of Supply or "SOS" branch of the Army of the USA was created on 28 February 1942 by Executive Order Number 9082 "Reorganizing the Army and the War Department" and War Department Circular No. 59, dated 2 March 1942. Services of Supp ...
for the European Theater during the War, which built up a telecommunications infrastructure in the region to carry out its logistics tasks. Following the
Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposi ...
, US and British intelligence have shared information as part of the UKUSA Agreement. The principal aspect of this is that GCHQ and its US equivalent, the
National Security Agency The National Security Agency (NSA) is a national-level 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, collecti ...
(NSA), share technologies, infrastructure and information. GCHQ ran many
signals intelligence Signals intelligence (SIGINT) is intelligence-gathering by interception of '' signals'', whether communications between people (communications intelligence—abbreviated to COMINT) or from electronic signals not directly used in communication ...
(SIGINT) monitoring stations abroad. During the early
Cold War The Cold War is a term commonly used to refer to a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term '' cold war'' is used because t ...
, the remnants of the
British Empire The British Empire was composed of the dominions, colonies, protectorates, mandates, and other territories ruled or administered by the United Kingdom and its predecessor states. It began with the overseas possessions and trading posts e ...
provided a global network of ground stations which were a major contribution to the UKUSA Agreement; the US regarded RAF Little Sai Wan in
Hong Kong Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China (abbr. Hong Kong SAR or HKSAR), is a List of cities in China, city and Special administrative regions of China, special ...
as the most valuable of these. The monitoring stations were largely run by inexpensive
National Service National service is the system of voluntary government service, usually military service. Conscription is mandatory national service. The term ''national service'' comes from the United Kingdom's National Service (Armed Forces) Act 1939. The ...
recruits, but when this ended in the early 1960s, the increased cost of civilian employees caused budgetary problems. In 1965 a Foreign Office review found that 11,500 staff were involved in SIGINT collection (8,000 GCHQ staff and 3,500 military personnel), exceeding the size of the Diplomatic Service. Reaction to the Suez War led to the eviction of GCHQ from several of its best foreign SIGINT collection sites, including the new Perkar, Ceylon site and RAF Habbaniya, Iraq. The staff largely moved to tented encampments on military bases in Cyprus, which later became the
Sovereign Base Area Akrotiri and Dhekelia, officially the Sovereign Base Areas of Akrotiri and Dhekelia (SBA),, ''Periochés Kyríarchon Váseon Akrotiríou ke Dekélias''; tr, Ağrotur ve Dikelya İngiliz Egemen Üs Bölgeleri is a British Overseas Territory o ...
. Duncan Campbell and Mark Hosenball revealed the existence of GCHQ in 1976 in an article for ''
Time Out Time-out, Time Out, or timeout may refer to: Time * Time-out (sport), in various sports, a break in play, called by a team * Television timeout, a break in sporting action so that a commercial break may be taken * Timeout (computing), an engine ...
''; as a result, Hosenball was deported from the UK. GCHQ had a very low profile in the media until 1983 when the trial of
Geoffrey Prime Geoffrey Arthur Prime (born 21 February 1938) is a former British spy who disclosed information to the Soviet Union while working for the Royal Air Force and later for the Government Communications Headquarters (GCHQ), a British intelligence age ...
, a KGB mole within it, created considerable media interest.


Trade union disputes

In 1984, GCHQ was the centre of a political row when, in the wake of strikes which affected Sigint collection, the
Conservative Conservatism is a cultural, social, and political philosophy that seeks to promote and to preserve traditional institutions, practices, and values. The central tenets of conservatism may vary in relation to the culture and civilization in ...
government of
Margaret Thatcher Margaret Hilda Thatcher, Baroness Thatcher (; 13 October 19258 April 2013) was Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party from 1975 to 1990. She was the first female British prime ...
prohibited its employees from belonging to a trade union. Following the breakdown of talks and the failure to negotiate a no-strike agreement, it was believed that membership of a union would be in conflict with
national security National security, or national defence, is the security and defence of a sovereign state, including its citizens, economy, and institutions, which is regarded as a duty of government. Originally conceived as protection against military att ...
. A number of mass national one-day strikes were held to protest this decision, claimed by some as the first step to wider bans on trade unions. Appeals to British Courts and European Commission of Human Rights were unsuccessful. The government offered a sum of money to each employee who agreed to give up their union membership. Appeal to the
ILO The International Labour Organization (ILO) is a United Nations agency whose mandate is to advance social and economic justice by setting international labour standards. Founded in October 1919 under the League of Nations, it is the first and ol ...
resulted in a decision that government's actions were in violation of Freedom of Association and Protection of the Right to Organise Convention. A no-strike agreement was eventually negotiated and the ban lifted by the incoming Labour government in 1997, with the Government Communications Group of the Public and Commercial Services Union (PCS) being formed to represent interested employees at all grades. In 2000, a group of 14 former GCHQ employees, who had been dismissed after refusing to give up their union membership, were offered re-employment, which three of them accepted.


Post Cold War


1990s: Post-Cold War restructuring

The Intelligence Services Act 1994 formalised the activities of the intelligence agencies for the first time, defining their purpose, and the British Parliament's
Intelligence and Security Committee The Intelligence and Security Committee of Parliament (ISC) is a statutory joint committee of the Parliament of the United Kingdom, appointed to oversee the work of the UK intelligence community. The committee was established in 1994 by the I ...
was given a remit to examine the expenditure, administration and policy of the three intelligence agencies. The objectives of GCHQ were defined as working as "in the interests of national security, with particular reference to the defence and foreign policies of His Majesty's government; in the interests of the economic wellbeing of the United Kingdom; and in support of the prevention and the detection of serious crime". During the introduction of the Intelligence Agency Act in late 1993, the former Prime Minister Jim Callaghan had described GCHQ as a "full-blown bureaucracy", adding that future bodies created to provide oversight of the intelligence agencies should "investigate whether all the functions that GCHQ carries out today are still necessary." In late 1993 civil servant Michael Quinlan advised a deep review of the work of GCHQ following the conclusion of his "Review of Intelligence Requirements and Resources", which had imposed a 3% cut on the agency. The
Chief Secretary to the Treasury The chief secretary to the Treasury is a ministerial office in the government of the United Kingdom. The office is the second most senior in the Treasury, after the chancellor of the Exchequer. The office was created in 1961, to share the burde ...
,
Jonathan Aitken Jonathan William Patrick Aitken (born 30 August 1942) is a British author, Church of England priest, former prisoner and former Conservative Party politician. Beginning his career in journalism, he was elected to Parliament in 1974 (serving u ...
, subsequently held face to face discussions with the intelligence agency directors to assess further savings in the wake of Quinlan's review. Aldrich (2010) suggests that Sir
John Adye Sir John Anthony Adye KCMG (born 24 October 1939) is a former Director of the British signals intelligence agency, GCHQ, a post he held from 1989 to 1996. Career Adye was born to Arthur Francis Capel Adye and Hilda Marjorie (née Elkes). Educate ...
, the then Director of GCHQ performed badly in meetings with Aitken, leading Aitken to conclude that GCHQ was "suffering from out-of-date methods of management and out-of-date methods for assessing priorities". GCHQ's budget was £850 million in 1993, (£ as of ) compared to £125 million for the Security Service and SIS (MI5 and MI6). In December 1994 the businessman Roger Hurn was commissioned to begin a review of GCHQ, which was concluded in March 1995. Hurn's report recommended a cut of £100  million in GCHQ's budget; such a large reduction had not been suffered by any British intelligence agency since the end of World War II. The J Division of GCHQ, which had collected SIGINT on Russia, disappeared as a result of the cuts. The cuts had been mostly reversed by 2000 in the wake of threats from violent non-state actors, and risks from increased terrorism, organised crime and illegal access to nuclear, chemical and biological weapons.
David Omand Sir David Bruce Omand (born 15 April 1947) is a British former senior civil servant who served as the Director of the Government Communications Headquarters ( GCHQ) from 1996 to 1997. Background Omand was born on 15 April 1947. His father, ...
became the Director of GCHQ in 1996, and greatly restructured the agency in the face of new and changing targets and rapid technological change. Omand introduced the concept of "Sinews" (or "SIGINT New Systems") which allowed more flexible working methods, avoiding overlaps in work by creating fourteen domains, each with a well-defined working scope. The tenure of Omand also saw the construction of a modern new headquarters, intended to consolidate the two old sites at Oakley and Benhall into a single, more open-plan work environment. Located on a 176-acre site in Benhall, it would be the largest building constructed for secret intelligence operations outside the United States. Operations at GCHQ's
Chung Hom Kok Chung Hom Kok ( or ) is an area in the southern Hong Kong Island in Hong Kong. It is a popular site for barbecue and swimming with a beach and lifeguard services available from April to October. West of Stanley, Chung Hom Kok is referred to as th ...
listening station in Hong Kong ended in 1994. GCHQ's Hong Kong operations were extremely important to their relationship with the NSA, who contributed investment and equipment to the station. In anticipation of the transfer of Hong Kong to the Chinese government in 1997, the Hong Kong stations operations were moved to Australian Defence Satellite Communications Station in Geraldton in
Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to t ...
. Operations that used GCHQ's intelligence-gathering capabilities in the 1990s included the monitoring of communications of Iraqi soldiers in the
Gulf War The Gulf War was a 1990–1991 armed campaign waged by a 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Iraq were carried out in two key phases: ...
, of
dissident republican Dissident republicans, renegade republicans, anti-Agreement republicans or anti-ceasefire republicans ( ga, poblachtach easaontach) are Irish republicans who do not support the current peace agreements in Northern Ireland. The agreements follow ...
terrorists and the Real IRA, of the various factions involved in the
Yugoslav Wars The Yugoslav Wars were a series of separate but related Naimark (2003), p. xvii. ethnic conflicts, wars of independence, and insurgencies that took place in the SFR Yugoslavia from 1991 to 2001. The conflicts both led up to and resulted from ...
, and of the criminal Kenneth Noye. In the mid 1990s GCHQ began to assist in the investigation of
cybercrime A cybercrime is a crime that involves a computer or a computer network.Moore, R. (2005) "Cyber crime: Investigating High-Technology Computer Crime," Cleveland, Mississippi: Anderson Publishing. The computer may have been used in committing t ...
.


2000s: Coping with the Internet

At the end of 2003, GCHQ moved in to its new building. Built on a circular plan around a large central courtyard, it quickly became known as the Doughnut. At the time, it was one of the largest public-sector building projects in Europe, with an estimated cost of £337 million. The new building, which was designed by
Gensler Gensler is a global design and architecture firm founded in San Francisco, California, in 1965. In 2021, Gensler generated $1.235 billion in revenue, the most of any architecture firm in the U.S. As of 2021, Gensler operated offices in 49 citi ...
and constructed by
Carillion Carillion plc was a British multinational construction and facilities management services company headquartered in Wolverhampton in the United Kingdom, prior to its liquidation in January 2018. Carillion was created in July 1999, following ...
, became the base for all of GCHQ's
Cheltenham Cheltenham (), also known as Cheltenham Spa, is a spa town and borough on the edge of the Cotswolds in the county of Gloucestershire, England. Cheltenham became known as a health and holiday spa town resort, following the discovery of mineral s ...
operations. The public spotlight fell on GCHQ in late 2003 and early 2004 following the sacking of Katharine Gun after she leaked to ''
The Observer ''The Observer'' is a British newspaper published on Sundays. It is a sister paper to ''The Guardian'' and '' The Guardian Weekly'', whose parent company Guardian Media Group Limited acquired it in 1993. First published in 1791, it is the ...
'' a confidential email from agents at the United States'
National Security Agency The National Security Agency (NSA) is a national-level 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, collecti ...
addressed to GCHQ agents about the wiretapping of UN delegates in the run-up to the 2003 Iraq war. GCHQ gains its intelligence by monitoring a wide variety of communications and other electronic signals. For this, a number of stations have been established in the UK and overseas. The listening stations are at Cheltenham itself, Bude, Scarborough,
Ascension Island Ascension Island is an isolated volcanic island, 7°56′ south of the Equator in the South Atlantic Ocean. It is about from the coast of Africa and from the coast of South America. It is governed as part of the British Overseas Territory of ...
, and with the United States at Menwith Hill.
Ayios Nikolaos Station Ayios Nikolaos Station (also spelled ''Agios Nikolaos''; el, Άγιος Νικόλαος, lit. "Saint Nicholas") is a British military station and part of in the British Sovereign Base Area of Dhekelia in Cyprus. It is a former village (Ayios ...
in Cyprus is run by the
British Army The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gurkha ...
for GCHQ. In March 2010, GCHQ was criticised by the
Intelligence and Security Committee The Intelligence and Security Committee of Parliament (ISC) is a statutory joint committee of the Parliament of the United Kingdom, appointed to oversee the work of the UK intelligence community. The committee was established in 1994 by the I ...
for problems with its IT security practices and failing to meet its targets for work targeted against cyber attacks. As revealed by
Edward Snowden Edward Joseph Snowden (born June 21, 1983) is an American and naturalized Russian former computer intelligence consultant who leaked highly classified information from the National Security Agency (NSA) in 2013, when he was an employee and su ...
in ''
The Guardian ''The Guardian'' is a British daily newspaper. It was founded in 1821 as ''The Manchester Guardian'', and changed its name in 1959. Along with its sister papers '' The Observer'' and '' The Guardian Weekly'', ''The Guardian'' is part of the ...
'', GCHQ spied on foreign politicians visiting the 2009 G-20 London Summit by eavesdropping phonecalls and emails and monitoring their computers, and in some cases even ongoing after the summit via
keylogger Keystroke logging, often referred to as keylogging or keyboard capturing, is the action of recording (logging) the keys struck on a keyboard, typically covertly, so that a person using the keyboard is unaware that their actions are being monitored ...
s that had been installed during the summit. According to Edward Snowden, at that time GCHQ had two principal umbrella programs for collecting communications: * "
Mastering the Internet Mastering the Internet (MTI) is a mass surveillance project led by the British communications intelligence agency Government Communications Headquarters (GCHQ) budgeted at over £1 billion. According to reports in '' The Register'' and '' The Su ...
" (MTI) for Internet traffic, which is extracted from fibre-optic cables and can be searched by using the Tempora computer system. * "
Global Telecoms Exploitation Global Telecoms Exploitation is reportedly a secret British telephonic mass surveillance programme run by the British signals intelligence and computer security agency, the Government Communications Headquarters (GCHQ). Its existence was revea ...
" (GTE) for telephone traffic. GCHQ has also had access to the US internet monitoring programme PRISM from at least as far back as June 2010. PRISM is said to give the National Security Agency and FBI easy access to the systems of nine of the world's top internet companies, including Google, Facebook, Microsoft, Apple, Yahoo, and Skype. From 2013, GCHQ realised that public attitudes to Sigint had changed and its former unquestioned secrecy was no longer appropriate or acceptable. The growing use of the Internet, together with its inherent insecurities, meant that the communications traffic of private citizens were becoming inextricably mixed with those of their targets and openness in the handling of this issue was becoming essential to their credibility as an organisation. The Internet had become a "cyber commons", with its dominance creating a "second age of Sigint". GCHQ transformed itself accordingly, including greatly expanded Public Relations and Legal departments, and adopting public education in cyber security as an important part of its remit.


2010s

In February 2014, ''The Guardian'', based on documents provided by Snowden, revealed that GCHQ had indiscriminately collected 1.8 million private Yahoo webcam images from users across the world. In the same month NBC and
The Intercept ''The Intercept'' is an American left-wing news website founded by Glenn Greenwald, Jeremy Scahill, Laura Poitras and funded by billionaire eBay co-founder Pierre Omidyar. Its current editor is Betsy Reed. The publication initially report ...
, based on documents released by Snowden, revealed the
Joint Threat Research Intelligence Group The Joint Threat Research Intelligence Group (JTRIG) is a unit of the Government Communications Headquarters (GCHQ), the British intelligence agency. The existence of JTRIG was revealed as part of the global surveillance disclosures in documents le ...
and the Computer Network Exploitation units within GCHQ. Their mission was cyber operations based on "dirty tricks" to shut down enemy communications, discredit, and plant misinformation on enemies. These operations were 5% of all GCHQ operations according to a conference slideshow presented by the GCHQ. Soon after becoming Director of GCHQ in 2014, Robert Hannigan wrote an article in the ''
Financial Times The ''Financial Times'' (''FT'') is a British daily newspaper printed in broadsheet and published digitally that focuses on business and economic current affairs. Based in London, England, the paper is owned by a Japanese holding company, Nik ...
'' on the topic of
internet surveillance Computer and network surveillance is the monitoring of computer activity and data stored locally on a computer or data being transferred over computer networks such as the Internet. This monitoring is often carried out covertly and may be comp ...
, stating that "however much arge US technology companiesmay dislike it, they have become the command and control networks of choice for terrorists and criminals" and that GCHQ and its sister agencies "cannot tackle these challenges at scale without greater support from the private sector", arguing that most internet users "would be comfortable with a better and more sustainable relationship between the ntelligenceagencies and the tech companies". Since the
2013 global surveillance disclosures Thirteen or 13 may refer to: * 13 (number), the natural number following 12 and preceding 14 * One of the years 13 BC, AD 13, 1913, 2013 Music * 13AD (band), an Indian classic and hard rock band Albums * ''13'' (Black Sabbath album), 2013 * ...
, large US technology companies have improved security and become less co-operative with foreign intelligence agencies, including those of the UK, generally requiring a US court order before disclosing data. However the head of the UK technology industry group
techUK The cyber security (or information assurance) community in the United Kingdom is diverse, with many stakeholders groups contributing to support the '' UK Cyber Security Strategy''. The following is a list of some of these stakeholders. Governme ...
rejected these claims, stating that they understood the issues but that disclosure obligations "must be based upon a clear and transparent legal framework and effective oversight rather than, as suggested, a deal between the industry and government". In 2015, documents obtained by ''
The Intercept ''The Intercept'' is an American left-wing news website founded by Glenn Greenwald, Jeremy Scahill, Laura Poitras and funded by billionaire eBay co-founder Pierre Omidyar. Its current editor is Betsy Reed. The publication initially report ...
'' from US
National Security Agency The National Security Agency (NSA) is a national-level 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, collecti ...
whistleblower
Edward Snowden Edward Joseph Snowden (born June 21, 1983) is an American and naturalized Russian former computer intelligence consultant who leaked highly classified information from the National Security Agency (NSA) in 2013, when he was an employee and su ...
revealed that GCHQ had carried out a mass-surveillance operation, codenamed KARMA POLICE, since about 2008.Ryan Gallager
Profiled: From Radio to Porn, British Spies Track Web Users' Online Identities
''The Intercept'' (25 September 2015).
The operation swept up the
IP address An Internet Protocol address (IP address) is a numerical label such as that is connected to a computer network that uses the Internet Protocol for communication.. Updated by . An IP address serves two main functions: network interface ident ...
of Internet users visiting websites, and was established with no public scrutiny or oversight. KARMA POLICE is a powerful spying tool in conjunction with other GCHQ programs because IP addresses could be cross-referenced with other data. The goal of the program, according to the documents, was "either (a) a web browsing profile for every visible user on the internet, or (b) a user profile for every visible website on the internet." In 2015, GCHQ admitted for the first time in court that it conducts computer hacking. In 2017, US Press Secretary
Sean Spicer Sean Michael Spicer (born September 23, 1971) is a former American political aide who served as the 30th White House Press Secretary and as White House Communications Director under President Donald Trump in 2017. Spicer was communications dire ...
alleged that GCHQ had conducted surveillance on US President
Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021. Trump graduated from the Wharton School of the University of P ...
, basing the allegation on statements made by a media commentator during a
Fox News The Fox News Channel, abbreviated FNC, commonly known as Fox News, and stylized in all caps, is an American multinational conservative cable news television channel based in New York City. It is owned by Fox News Media, which itself is o ...
segment. The US government formally apologised for the allegations and promised they would not be repeated. However, surveillance of Russian agents did pick up contacts made by Trump's campaign team in the run-up to his election, which were passed on to US agencies. On 31 October 2018, GCHQ joined
Instagram Instagram is a photo and video sharing social networking service owned by American company Meta Platforms. The app allows users to upload media that can be edited with filters and organized by hashtags and geographical tagging. Posts can ...
.


Personnel awards

GCHQ personnel are recognised annually by King Charles III (formerly the Prince of Wales) at the Prince of Wales's Intelligence Community Awards at
St James's Palace St James's Palace is the most senior royal palace in London, the capital of the United Kingdom. The palace gives its name to the Court of St James's, which is the monarch's royal court, and is located in the City of Westminster in London. Alt ...
or Clarence House alongside members of the Security Service (MI5), and
Secret Intelligence Service The Secret Intelligence Service (SIS), commonly known as MI6 ( Military Intelligence, Section 6), is the foreign intelligence service of the United Kingdom, tasked mainly with the covert overseas collection and analysis of human intellige ...
(MI6). Awards and citations are given to teams within the agencies as well as individuals.


Security mission

As well as a mission to gather intelligence, GCHQ has for a long-time had a corresponding mission to assist in the protection of the British government's own communications. When the Government Code and Cypher School (GC&CS) was created in 1919, its overt task was providing security advice. GC&CS's Security section was located in Mansfield College, Oxford during the Second World War. In April 1946, GC&CS became GCHQ, and the now GCHQ Security section moved from Oxford to join the rest of the organisation at Eastcote later that year.


LCSA

From 1952 to 1954, the intelligence mission of GCHQ relocated to Cheltenham; the Security section remained at Eastcote, and in March 1954 became a separate, independent organisation: the London Communications Security Agency (LCSA), which in 1958 was renamed to the London Communications-Electronic Security Agency (LCESA). In April 1965, GPO and MOD units merged with LCESA to become the Communications-Electronic Security Department (CESD).


CESG

In October 1969, CESD was merged into GCHQ and becoming Communications-Electronic Security Group (CESG). In 1977 CESG relocated from Eastcote to Cheltenham. CESG continued as the UK National Technical Authority for information assurance, including
cryptography Cryptography, or cryptology (from grc, , translit=kryptós "hidden, secret"; and ''graphein'', "to write", or '' -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adv ...
. CESG did not manufacture security equipment, but worked with industry to ensure the availability of suitable products and services, while GCHQ itself funded research into such areas, for example to the
Centre for Quantum Computation The Centre for Quantum Computation (CQC) is an alliance of quantum information research groups at the University of Oxford. It was founded by Artur Ekert in 1998. Until recently, the CQC also included research groups at the University of Camb ...
at
Oxford University Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
and the
Heilbronn Institute for Mathematical Research The Heilbronn Institute for Mathematical Research is an international research institute for mathematics based at the University of Bristol. It is named after the distinguished number theorist Hans Heilbronn who worked at Bristol University from 19 ...
at the
University of Bristol , mottoeng = earningpromotes one's innate power (from Horace, ''Ode 4.4'') , established = 1595 – Merchant Venturers School1876 – University College, Bristol1909 – received royal charter , type ...
. In the 21st century, CESG ran a number of assurance schemes such as CHECK, CLAS,
Commercial Product Assurance Commercial Product Assurance (CPA) is a CESG approach to gaining confidence in the security of commercial products. It is intended to supplant other approaches such as Common Criteria The Common Criteria for Information Technology Security Eval ...
(CPA) and CESG Assisted Products Service (CAPS).


Public key encryption

In late 1969 the concept for public-key encryption was developed and proven by James H. Ellis, who had worked for CESG (and before it, CESD) since 1965. Ellis lacked the
number theory Number theory (or arithmetic or higher arithmetic in older usage) is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions. German mathematician Carl Friedrich Gauss (1777–1855) said, "Ma ...
expertise necessary to build a workable system. Subsequently, a feasible implementation scheme via an asymmetric key algorithm was invented by another staff member
Clifford Cocks Clifford Christopher Cocks (born 28 December 1950) is a British mathematician and cryptographer. In 1973, while working at the United Kingdom Government Communications Headquarters (GCHQ), he invented a public-key cryptography algorithm equiv ...
, a mathematics graduate. This fact was kept secret until 1997.


NCSC

In 2016, the National Cyber Security Centre was established under GCHQ but located in London, as the UK's authority on cybersecurity. It absorbed and replaced CESG as well as activities that had previously existed outside GCHQ: the Centre for Cyber Assessment (CCA), Computer Emergency Response Team UK (CERT UK) and the cyber-related responsibilities of the
Centre for the Protection of National Infrastructure The Centre for the Protection of National Infrastructure (CPNI) is the United Kingdom government authority which provides protective security advice to businesses and organisations across the national infrastructure. Their advice aims to redu ...
(CPNI).


Joint Technical Language Service

The Joint Technical Language Service (JTLS) was established in 1955, drawing on members of the small Ministry of Defence technical language team and others, initially to provide standard English translations for organisational expressions in any foreign language, discover the correct English equivalents of technical terms in foreign languages and discover the correct expansions of abbreviations in any language. The remit of the JTLS has expanded in the ensuing years to cover technical language support and interpreting and translation services across the UK Government and to local public sector services in
Gloucestershire Gloucestershire ( abbreviated Glos) is a county in South West England. The county comprises part of the Cotswold Hills, part of the flat fertile valley of the River Severn and the entire Forest of Dean. The county town is the city of ...
and surrounding counties. The JTLS also produces and publishes foreign language working aids under crown copyright and conducts research into machine translation and on-line dictionaries and glossaries. The JTLS is co-located with GCHQ for administrative purposes.


International relationships

GCHQ operates in partnership with equivalent agencies worldwide in a number of bi-lateral and multi-lateral relationships. The principal of these is with the United States (
National Security Agency The National Security Agency (NSA) is a national-level 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, collecti ...
), Canada ( Communications Security Establishment), Australia (
Australian Signals Directorate Australian Signals Directorate (ASD), formerly the Defence Signals Directorate (DSD) is the federal statutory agency in the Australian Government responsible for foreign signals intelligence, support to military operations, cyber warfare, and i ...
) and New Zealand (
Government Communications Security Bureau The Government Communications Security Bureau (GCSB) ( mi, Te Tira Tiaki) is the public-service department of New Zealand charged with promoting New Zealand's national security by collecting and analysing information of an intelligence nature. ...
), through the mechanism of the UK-US Security Agreement, a broad intelligence-sharing agreement encompassing a range of intelligence collection methods. Relationships are alleged to include shared collection methods, such as the system described in the popular media as
ECHELON ECHELON, originally a secret government code name, is a surveillance program (signals intelligence/SIGINT collection and analysis network) operated by the five signatory states to the UKUSA Security Agreement:Given the 5 dialects that use ...
, as well as analysed product.


Legal basis

GCHQ's legal basis is enshrined in the Intelligence Services Act 1994 Section 3 as follows: Activities that involve interception of communications are permitted under the Regulation of Investigatory Powers Act 2000; this kind of interception can only be carried out after a warrant has been issued by a Secretary of State. The
Human Rights Act 1998 The Human Rights Act 1998 (c. 42) is an Act of Parliament of the United Kingdom which received royal assent on 9 November 1998, and came into force on 2 October 2000. Its aim was to incorporate into UK law the rights contained in the European Con ...
requires the intelligence agencies, including GCHQ, to respect citizens' rights as described in the
European Convention on Human Rights The European Convention on Human Rights (ECHR; formally the Convention for the Protection of Human Rights and Fundamental Freedoms) is an international convention to protect human rights and political freedoms in Europe. Drafted in 1950 by ...
.


Oversight

The
Prime Minister A prime minister, premier 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. Under those systems, a prime minister is ...
nominates cross-party
Members of Parliament A member of parliament (MP) is the representative in parliament of the people who live in their electoral district. In many countries with bicameral parliaments, this term refers only to members of the lower house since upper house members of ...
to an
Intelligence and Security Committee The Intelligence and Security Committee of Parliament (ISC) is a statutory joint committee of the Parliament of the United Kingdom, appointed to oversee the work of the UK intelligence community. The committee was established in 1994 by the I ...
. The remit of the Committee includes oversight of intelligence and security activities and reports are made directly to Parliament. Its functions were increased under the Justice and Security Act 2013 to provide for further access and investigatory powers. Judicial oversight of GCHQ's conduct is exercised by the Investigatory Powers Tribunal. The UK also has an independent
Intelligence Services Commissioner The Intelligence Services Commissioner, was a regulatory official in the United Kingdom appointed under Section 59 of the Regulation of Investigatory Powers Act 2000. They are tasked with reviewing actions and warrants taken by the Secretary of St ...
and Interception of Communications Commissioner, both of whom are former senior judges. The Investigatory Powers Tribunal ruled in December 2014 that GCHQ does not breach the European Convention of Human Rights, and that its activities are compliant with Articles 8 (right to privacy) and 10 (freedom of expression) of the European Convention of Human Rights. However, the Tribunal stated in February 2015 that one particular aspect, the data-sharing arrangement that allowed UK Intelligence services to request data from the US surveillance programmes Prism and
Upstream Upstream may refer to: * Upstream (bioprocess) * ''Upstream'' (film), a 1927 film by John Ford * Upstream (networking) * ''Upstream'' (newspaper), a newspaper covering the oil and gas industry * Upstream (petroleum industry) * Upstream (software ...
, had been in contravention of human rights law prior to this until two paragraphs of additional information, providing details about the procedures and safeguards, were disclosed to the public in December 2014. Furthermore, the IPT ruled that the legislative framework in the United Kingdom does not permit
mass surveillance Mass surveillance is the intricate surveillance of an entire or a substantial fraction of a population in order to monitor that group of citizens. The surveillance is often carried out by local and federal governments or governmental organizati ...
and that while GCHQ collects and analyses data in bulk, it does not practice mass surveillance. This complements independent reports by the Interception of Communications Commissioner, and a special report made by the Intelligence and Security Committee of Parliament; although several shortcomings and potential improvements to both oversight and the legislative framework were highlighted.


Abuses

Despite the inherent secrecy around much of GCHQ's work, investigations carried out by the UK government after the Snowden disclosures have admitted various abuses by the security services. A report by the
Intelligence and Security Committee The Intelligence and Security Committee of Parliament (ISC) is a statutory joint committee of the Parliament of the United Kingdom, appointed to oversee the work of the UK intelligence community. The committee was established in 1994 by the I ...
(ISC) in 2015 revealed that a small number of staff at UK intelligence agencies had been found to misuse their surveillance powers, in one case leading to the dismissal of a member of staff at GCHQ, although there were no laws in place at the time to make these abuses a criminal offence. Later that year, a ruling by the Investigatory Powers Tribunal found that GCHQ acted unlawfully in conducting surveillance on two human rights organisations. The closed hearing found the government in breach of its internal surveillance policies in accessing and retaining the communications of the Egyptian Initiative for Personal Rights and the Legal Resources Centre in South Africa. This was only the second time in the IPT's history that it had made a positive determination in favour of applicants after a closed session. At another IPT case in 2015, GCHQ conceded that "from January 2010, the regime for the interception/obtaining, analysis, use, disclosure and destruction of legally privileged material has not been in accordance with the law for the purposes of Article 8(2) of the European convention on human rights and was accordingly unlawful". This admission was made in connection with a case brought against them by
Abdelhakim Belhaj Abdelhakim Belhaj (or Belhadj; ar, عبد الحكيم بلحاج, nom de guerre: Abu Abdallah Assadaq) (born 1 May 1966) is a Libyan politician and military leader. He is the leader of the Islamist al-Watan Party and former head of the Tripo ...
, a Libyan opponent of the former Gaddafi regime, and his wife Fatima Bouchard. The couple accused British ministers and officials of participating in their unlawful abduction, kidnapping and removal to Libya in March 2004, while Gaddafi was still in power. On 25 May 2021, the European Court of Human Rights (ECHR) ruled that the GCHQ is guilty of violating data privacy rules through their bulk interception of communications, and does not provide sufficient protections for confidential journalistic material because it gathers communications in bulk.


Surveillance of parliamentarians

In 2015 there was a complaint by
Green Party A green party is a formally organized political party based on the principles of green politics, such as social justice, environmentalism and nonviolence. Greens believe that these issues are inherently related to one another as a foundation f ...
MP
Caroline Lucas Caroline Patricia Lucas (born 9 December 1960) is a British politician who has twice led the Green Party of England and Wales and has been the Member of Parliament (MP) for Brighton Pavilion since the 2010 general election. She was re-elect ...
that British intelligence services, including GCHQ, had been spying on MPs allegedly "in defiance of laws prohibiting it." Then-
Home Secretary The secretary of state for the Home Department, otherwise known as the home secretary, is a senior minister of the Crown in the Government of the United Kingdom. The home secretary leads the Home Office, and is responsible for all nationa ...
,
Theresa May Theresa Mary May, Lady May (; née Brasier; born 1 October 1956) is a British politician who served as Prime Minister of the United Kingdom and Leader of the Conservative Party from 2016 to 2019. She previously served in David Cameron's cab ...
, had told Parliament in 2014 that: The Investigatory Powers Tribunal investigated the complaint, and ruled that contrary to the allegation, there was no law that gave the communications of Parliament any special protection. The Wilson Doctrine merely acts as a
political convention The terms party conference (UK English), political convention ( US and Canadian English), and party congress usually refer to a general meeting of a political party. The conference is attended by certain delegates who represent the party membe ...
.


Constitutional legal case

A controversial GCHQ case determined the scope of judicial review of prerogative powers (the Crown's residual powers under common law). This was '' Council of Civil Service Unions v Minister for the Civil Service'' 985AC 374 (often known simply as the "GCHQ case"). In this case, a prerogative Order in Council had been used by the prime minister (who is the
Minister for the Civil Service In the Government of the United Kingdom, the minister for the Civil Service is responsible for regulations regarding His Majesty's Civil Service, the role of which is to assist the governments of the United Kingdom in formulating and implementin ...
) to ban trade union activities by civil servants working at GCHQ. This order was issued without consultation. The House of Lords had to decide whether this was reviewable by
judicial review Judicial review is a process under which executive, legislative and administrative actions are subject to review by the judiciary. A court with authority for judicial review may invalidate laws, acts and governmental actions that are incomp ...
. It was held that executive action is not immune from judicial review simply because it uses powers derived from common law rather than statute (thus the prerogative is reviewable).


Leadership

The following is a list of the heads and operational heads of GCHQ and GC&CS: *Sir Hugh Sinclair KCB (1919 - 1939) (Founder) * Alastair Denniston CMG CBE (1921 – February 1942) (Operational Head) *Sir Edward Travis KCMG CBE (February 1942 – 1952) *Sir Eric Jones KCMG CB CBE (April 1952 – 1960) *Sir
Clive Loehnis Sir Clive Loehnis KCMG (24 August 1902 – 23 May 1992) was a director of the British signals intelligence agency, GCHQ, a post he held from 1960 to 1964. Career Loehnis was born in 1902 in Chelsea, London. His father, Herman Loehnis, was born in ...
KCMG (1960–1964) *Sir
Leonard Hooper Sir Leonard James (Joe) Hooper (23 July 1914 – 19 February 1994) was director of the British signals intelligence agency, GCHQ, a post he held from 1965 to 1973. Career Educated at Alleyn's School in South East London and Worcester College, Oxfo ...
KCMG CBE (1965–1973) *Sir
Arthur Bonsall Sir Arthur Wilfred "Bill" Bonsall (25 June 1917 – 26 November 2014) was director of the British signals intelligence agency, GCHQ—a post he held from 1973 to 1978. Early life Bonsall was born in Middlesbrough on 25 June 1917, the eldest s ...
KCMG CBE (1973–1978) *Sir Brian John Maynard Tovey KCMG (1978–1983) *Sir
Peter Marychurch Sir Peter Harvey Marychurch (13 June 1927 – 21 May 2017) was Director of the British signals intelligence agency, GCHQ, a post he held from 1983 to 1989. Career Educated at The John Lyon School, Marychurch served in the Royal Air Force imme ...
KCMG (1983–1989) *Sir John Anthony Adye KCMG (1989–1996) *Sir
David Omand Sir David Bruce Omand (born 15 April 1947) is a British former senior civil servant who served as the Director of the Government Communications Headquarters ( GCHQ) from 1996 to 1997. Background Omand was born on 15 April 1947. His father, ...
GCB (1996 –1997) *Sir Kevin Tebbit KCB CMG (1998) *Sir Francis Richards KCMG CVO DL (1998–2003) *Sir David Pepper KCMG (2003–2008) *Sir Iain Lobban KCMG CB (2008–2014) * Robert Hannigan CMG (2014–2017) *Sir Jeremy Fleming KCMG CB (2017–present)


Stations and former stations

The following are stations and former stations that have operated since the
Cold War The Cold War is a term commonly used to refer to a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term '' cold war'' is used because t ...
.


Current

United Kingdom *
GCHQ Bude GCHQ Bude, also known as GCHQ Composite Signals Organisation Station Morwenstow, abbreviated to GCHQ CSO Morwenstow, is a UK Government satellite ground station and eavesdropping centre located on the north Cornwall coast at Cleave Camp, betwee ...
, Cornwall * GCHQ Cheltenham, Gloucestershire (Headquarters) *GCHQ London *GCHQ Manchester *
GCHQ Scarborough GCHQ Scarborough is a satellite ground station located on Irton Moor, on the outskirts of Scarborough in North Yorkshire, England, operated by the British signals intelligence service (GCHQ). It is believed to be the longest continuous serving ...
, North Yorkshire * RAF Digby, Lincolnshire * RAF Menwith Hill, North Yorkshire Overseas * GCHQ Ascension Island * GCHQ Cyprus


Former

United Kingdom * GCHQ Brora, Sutherland * GCHQ Cheadle, Staffordshire * GCHQ Culmhead, Somerset * GCHQ Hawklaw, Fife Overseas * GCHQ Hong Kong


GCHQ Certified Training

The GCHQ Certified Training (GCT) scheme was established to certify two main levels of cybersecurity training. There are also degree and masters level courses. These are: * Awareness Level Training: giving an understanding and a foundation in cybersecurity concepts; and * Application Level Training: a more in-depth course The GCT scheme was designed to help organisations find the right training that also met GCHQ's exacting standards. It was designed to assure high-quality cybersecurity training courses where the training provider had also undergone rigorous quality checks. The GCT process is carried out by APMG as the independent certification body. The scheme is part of the National Cyber Security Programme established by the Government to develop knowledge, skills and capability in all aspects of cybersecurity in the, and is based on the IISP Skills Framework.


In popular culture

The historical drama film '' The Imitation Game'' (2014) featured Benedict Cumberbatch portraying
Alan Turing Alan Mathison Turing (; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher, and theoretical biologist. Turing was highly influential in the development of theoretical ...
's efforts to break the Enigma code while employed by the Government Code and Cypher School. GCHQ have set a number of cryptic online challenges to the public, used to attract interest and for recruitment, starting in late 1999. The response to the 2004 challenge was described as "excellent", and the challenge set in 2015 had over 600,000 attempts. It also published the ''GCHQ puzzle book'' in 2016 which sold more than 300,000 copies, with the proceeds going to charity. A second book was published in October 2018. GCHQ appeared on the ''
Doctor Who ''Doctor Who'' is a British science fiction television series broadcast by the BBC since 1963. The series depicts the adventures of a Time Lord called the Doctor, an extraterrestrial being who appears to be human. The Doctor explores the ...
'' 2019 special " Resolution" where the Reconnaissance Scout Dalek storms the facility and exterminates the staff in order to use the organisation's resources to summon a Dalek fleet. GCHQ is the setting of the 2020
Sky One Sky One was a British pay television channel operated and owned by Sky Group (a division of Comcast). Originally launched on 26 April 1982 as Satellite Television, it was Europe's first satellite and non- terrestrial channel. From 31 July 1989, ...
sitcom ''
Intelligence Intelligence has been defined in many ways: the capacity for abstraction, logic, understanding, self-awareness, learning, emotional knowledge, reasoning, planning, creativity, critical thinking, and problem-solving. More generally, it can ...
'', featuring
David Schwimmer David Lawrence Schwimmer (born November 2, 1966) is an American actor, director and producer. He gained worldwide recognition for portraying Ross Geller in the sitcom ''Friends'', for which he received a Screen Actors Guild Award and a Primeti ...
as an incompetent American
NSA The National Security Agency (NSA) is a national-level 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, collec ...
officer liaising with GCHQ's Cyber Crimes unit. GCHQ is the setting of the 2022
Channel 4 Channel 4 is a British free-to-air public broadcast television network operated by the state-owned Channel Four Television Corporation. It began its transmission on 2 November 1982 and was established to provide a fourth television service ...
drama ''
The Undeclared War ''The Undeclared War'' is a British near-future thriller television mini-series, aired from 30 June 2022 on Channel 4. The series is written by Peter Kosminsky. Plot The series follows two main characters, Saara Parvin in the UK and Vadim T ...
''. Set in the near future, it depicts a work experience student at the government agency during a cyberattack on the UK and the implications.


See also

GCHQ units: *
Joint Operations Cell Joint Operations Cell is a unit of GCHQ, a British signals intelligence agency, and the National Crime Agency (NCA), a United Kingdom national law enforcement agency. It opened in November 2015 with the intention of tackling a range of crime on the ...
* National Cyber Security Centre GCHQ specifics: *
Capenhurst Capenhurst is a village and civil parish in Chester in the unitary authority of Cheshire West and Chester and the ceremonial county of Cheshire England. According to the 2001 Census, Capenhurst had a population of 237, increasing to 380 at the 2 ...
– said to be home to a GCHQ monitoring site in the 1990s * Hugh Alexander – head of the cryptanalysis division at GCHQ from 1949 to 1971 *
Operation Socialist Operation Socialist is the code name given by the British signals and communications agency Government Communications Headquarters (GCHQ) to an operation in which GCHQ successfully breached the infrastructure of the Belgian telecommunications compan ...
, a 2010–13 operation in Belgium *
Zircon Zircon () is a mineral belonging to the group of nesosilicates and is a source of the metal zirconium. Its chemical name is zirconium(IV) silicate, and its corresponding chemical formula is Zr SiO4. An empirical formula showing some of t ...
, the 1980s cancelled GCHQ satellite project UK agencies: *
British intelligence agencies The Government of the United Kingdom maintains intelligence agencies within three government departments, the Foreign Office, the Home Office and the Ministry of Defence. These agencies are responsible for collecting and analysing foreign and d ...
* Joint Forces Intelligence Group * RAF Intelligence * UK cyber security community Elsewhere: *
Signals intelligence by alliances, nations and industries Signals intelligence by alliances, nations and industries comprises signals intelligence (SIGINT) gathering activities by national and non-national entities; these entities are commonly responsible for communications security (COMSEC) as well. M ...
*
NSA The National Security Agency (NSA) is a national-level 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, collec ...
– equivalent United States organisation


Notes and references


Bibliography

* * * * *


External links

*
His Majesty's Government Communications Centre

GovCertUK

GCHQ: Britain's Most Secret Intelligence Agency

BBC: A final look at GCHQ's top secret Oakley site in Cheltenham


{{Portal bar, United Kingdom 1919 establishments in the United Kingdom British intelligence agencies Computer security organizations Cryptography organizations Foreign relations of the United Kingdom Government agencies established in 1919 Organisations based in Cheltenham Signals intelligence agencies Foreign Office during World War II Organizations associated with Russian interference in the 2016 United States elections Headquarters in the United Kingdom