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Government Communications Headquarters
GCHQ is one of Britain's three major Intelligence Agencies. GCHQ works
in partnership with the Security Service (MI5)
and the Secret Intelligence Service (MI6)
to protect UK national security interests.
GCHQ is responsible for providing Signals Intelligence (SIGINT)
and information assurance.
Its main customers are the UK Government and the British Armed Forces.
GCHQ started life during World War I as
the Government Code & Cypher School {GC&CS).
During WWII they established a major codebreaking operation at
Bletchley Park (BP), which today is a museum.
Immediately after the war, in 1946, it was renamed GCHQ and relocated to
Eastcote. In 1951, GCHQ moved to a new premises Cheltenham, where the organization
is still located today.
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GCHQ devices on this website
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The image on the right shows the current GCHQ headquearters in Cheltenham (UK)
at the point where the building was nearly finished in 2003.
The building is nicknamed 'the Doughnut'.
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GCHQ is based at the following locations"
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Cheltenham Headquarters Scarborough Signals intelligence site Bude Telecommunications data collection site Manchester High-tech offices London National Cyber Security Cebtre (NCSC) 1
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In the past, GCHQ also used (secret) offices on
Palmer Street, where they resided for 66 years [5].
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Although GCHQ is a secret - and therefore rather closed- organisation,
they present themselves to the general public every now and then, and provide
information about their work, their responsibilities and their history.
GCHQ was, for example, one of the major sponsors of the
Enigma Reunion 2009 at
Bletchley Park, where they exhibited a number of
rare cipher machines and methods.
➤ More about the Enigma Reunion 2009
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Any links shown in red are currently unavailable.
If you like the information on this website, why not make a donation?
© Crypto Museum. Last changed: Thursday, 18 January 2024 - 14:02 CET.
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![People at the GCHQ stand at the Enigma Reunion 2009. Copyright Kevin Coleman [3].](img/500395/000/full.jpg)
![GCHQ stand at Enigma Reunion 2009. Copyright Frederic Andre [2].](img/500395/002/thumbnail.jpg "image # 500395/002")
![People at the GCHQ stand at the Enigma Reunion 2009. Copyright Kevin Coleman [3].](img/500395/000/thumbnail.jpg "image # 500395/000")
![People at the GCHQ stand at the Enigma Reunion 2009. Copyright Kevin Coleman [3].](img/500395/001/thumbnail.jpg "image # 500395/001")
![GCHQ stand at Enigma Reunion 2009. Copyright Frederic Andre [2].](img/500395/002/full.jpg)
![People at the GCHQ stand at the Enigma Reunion 2009. Copyright Kevin Coleman [3].](img/500395/001/full.jpg)