Operation Tempora: GCHQ in fresh snooping row as it eavesdrops on phones and the internet

Data includes recordings of telephone calls, contents of emails, details of messages on social media and the history of internet use

Britain’s electronic eavesdropping centre, GCHQ, has started collecting data from the network of fibre-optic cables carrying the world’s telephone calls and internet traffic, it was reported tonight.

The massive programme of surveillance allows the agency to store vast volumes of information for up to 30 days which it can then study for evidence of terrorist and criminal activity.

The claims, in The Guardian, will provoke a fresh civil liberties storm following recent allegations that thousands of Britons could have been spied on by GCHQ through a covert link with the US National Security Agency (NSA).

According to the paper, the agency has been running Operation Tempora for 18 months under which it gains access to transatlantic cables carrying data about phone calls and internet use. It is said to share information gleaned from it with the NSA.

The data includes recordings of telephone calls, contents of emails, details of messages on social media and the history of internet use.

Documents seen by the paper suggest that by last year GCHQ was handling 600m “telephone events” each day, had tapped more than 200 fibre-optic cables and was able to process data from at least 46 at a time.

A source told The Guardian that the eavesdropping allowed the security services to arrest three people planning attacks on last year’s London Olympics, as well as terrorist cells in the Midlands and Luton. It has also been used against child exploitation networks and to boost cyberdefence.

A GCHQ spokesman said: “It is longstanding practice that we do not comment on intelligence matters.”

He added: “GCHQ takes its obligations under the law very seriously. Our work is carried out in accordance with a strict legal and policy framework which ensures that our activities are authorised, necessary and proportionate, and that there is rigorous oversight, including from the Secretary of State, the Interception and Intelligence Services Commissioners and the Intelligence and Security Committee.”

* Edward Snowden has been charged in his absence by US prosecutors with spying and theft of government property. The charges are included in sealed documents filed by prosecutors.

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