Since that discovery, UK intelligence agency GCHQ has been unsuccessfully attempted to decipher it.
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Despite its doubts, GCHQ has stated that it'd be interesting to see the findings.
ENGADGET: Alt-week 12.22.12: strange skulls, solar portraits and 17-minute code cracking
He had a job that he has never been able to talk about to anyone outside GCHQ.
BBC: A final look at GCHQ's top secret Oakley site in Cheltenham
GCHQ's people and operations are now located in one place in Cheltenham - the 'doughnut' building in Benhall.
New plans to reduce congestion and ease parking issues around Gloucestershire's GCHQ should come into force this month.
That third member is usually a former Whitehall official whose career was inside MI5, MI6, GCHQ or the Foreign Office.
It will include experts from government communications body GCHQ, MI5, police and business and aims to better co-ordinate responses to the threats.
"We should remember that this was the site of GCHQ's headquarters for longer than anywhere else in our history, " Mr Lobban said.
Mr Hague also used his visit to announce a boost in funding for the preservation of Bletchley Park, the forerunner to GCHQ.
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However, Mr Lobban said he didn't want anyone to think GCHQ was "trying to claim that Turing is ours and nobody else's".
The decision to close the site was taken as part of a move to centralise GCHQ's headquarters in one location, making significant savings.
The document noted the committee had concerns about GCHQ's "inability to retain a suitable cadre of internet specialists" to respond to cyber threats.
GCHQ, however, remains skeptical, stating that without the exact codebook, or full details of the encryption, it's impossible to verify any alleged solution.
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And it says some lessons have been learned from the 2007 floods, which caused disruption at GCHQ, but there was "still scope for improvement".
Oakley became the main site for GCHQ when its former location at Eastcote, Middlesex proved too small to accommodate its new Cold War mission.
These include cycle networks, measures to improve the traffic flow at Arle Court roundabout and a new bus link between GCHQ and Charlton Kings.
As The New York Times noted last week, GCHQ is run "in close collaboration with the National Security Agency (NSA) in the United States".
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The report notes that GCHQ created something called the Network Defence Intelligence and Security Team (NDIST) in September 2008, to respond to this dual threat.
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Ms Gun, who was sacked from GCHQ in June and charged on 13 November, thanked her family and friends for helping her through the case.
We have the Head of the Defence Staff on it, we have the Head of MI5, the Head of MI6, we have the Head of GCHQ.
This is despite the government body that advises on security, based at GCHQ in Cheltenham, drawing up standards for validating the security, or otherwise, of the meters.
That building is the focal point for GCHQ's continuing mission to produce signals intelligence, protect government communications from compromise and help defend the UK's interests in cyberspace.
Stephen Gale said it was "quite remarkable" that Mr Williams - who joined GCHQ aged 21 - had achieved what he had at such a young age.
Britain's major banks now share information on attempted cyber-attacks and hold regular meetings with officials from the UK's secret listening post GCHQ, the Public Accounts Committee was told.
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His British lawyers have begun an action alleging that GCHQ, the government's secret communications centre, may be helping to provide the US with information used to identify targets.
Update: We've been sent another statement, this time from GCHQ.
Here the early supercomputers built by GCHQ engineers, were installed.
BBC: A final look at GCHQ's top secret Oakley site in Cheltenham
There are currently 11 private prisons in the UK managed by companies including Serco, which also runs court transport services, and GSL, which built the GCHQ headquarters in Cheltenham.
Sir David, a former director of GCHQ (see article) who was Tony Blair's intelligence and security co-ordinator from 2002 until his retirement in 2005, shirks none of these issues.
According to the Economist, the company will work closely with GCHQ, the British signals-intelligence agency located in nearby Cheltenham, to persuade the UK and other governments that its equipment is trustworthy.
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