According to the latest Foreign Correspondent report, Mr Zygier met Australian Security Intelligence Organisation (Asio) agents and told them about secret operations he was involved in.
When he returns to Turkey, he will do so on a diplomatic passport issued by a member of the National Intelligence Organisation, the Turkish secret service.
Mr Lobban said at an event in Leeds that Turing had a played a key part in the "irrevocable change" that eventually led to the development of the "highly technological intelligence organisation that GCHQ is today".
The Economist Intelligence Unit, a sister organisation to The Economist, carries out a similar exercise (see table).
Angola's central bank ensures an overvalued kwanza (says the Economist Intelligence Unit, a sister organisation), which helps traders import those goods.
The Economist Intelligence Unit, a sister organisation of this newspaper, forecasts that by 2014 Liaoning will be the largest recipient of foreign investment in China.
The national security agency even contemplated intelligence-sharing with the organisation.
Germany's constitutional court in Karlsruhe rejected the ban after it established that most of the evidence against the far-right party was inadmissible because it had been collected by government intelligence agents who had infiltrated the organisation.
The organisation will be divided into conventional intelligence and counter-intelligence units.
By its nature, such a diffuse movement is much harder to monitor than a unitary organisation: witness the apparent lack of any advance intelligence about the Madrid plot.
The National Intelligence Council, however, is about as hard-headed an organisation as can be imagined.
Another new organisation called Conflicts Forum, founded by a former British intelligence officer, Alastair Crooke, attempts to serve as an interlocutor between militant Islamist groups, such as Hamas and Hizbullah, and the West.
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