One key innovation has been GCHQ’s ability to tap into and store huge volumes of data drawn from fibre-optic cables for up to 30 days so that it can be sifted and analysed. That operation, codenamed Tempora, has been running for some 18 months.
GCHQ and the NSA are consequently able to access and process vast quantities of communications between entirely innocent people, as well as targeted suspects.
This includes recordings of phone calls, the content of email messages, entries on Facebook and the history of any internet user’s access to websites – all of which is deemed legal, even though the warrant system was supposed to limit interception to a specified range of targets.
The existence of the programme has been disclosed in documents shown to the Guardian by the NSA whistleblower Edward Snowden as part of his attempt to expose what he has called “the largest programme of suspicionless surveillance in human history”.
The Americans were given guidelines for its use, but were told in legal briefings by GCHQ lawyers: “We have a light oversight regime compared with the US”.
When it came to judging the necessity and proportionality of what they were allowed to look for, would-be American users were told it was “your call”.
The Guardian understands that a total of 850,000 NSA employees and US private contractors with top secret clearance had access to GCHQ databases.
The term, “information superhighway” has always been insufficient to describe the Internet. In reality, the Web is a global communication space containing the private information of a large part of the population of every developed country. If someone were able to train an all-seeing eye onto the Internet, the blackmail potential would be almost limitless.
It is precisely this all-seeing eye that the British intelligence agency Government Communications Headquarters (GCHQ) and the American National Security Agency (NSA) have developed under the name Tempora. An appropriate real-world metaphor for the program might be something like this: In every room of every house and every apartment, cameras and microphones are installed, every letter is opened and copied, every telephone tapped. Everything that happens is recorded and can be accessed as needed.
It sounds preposterous, but it is frighteningly close to the reality that was unveiled by the Guardian on Friday. Together, the GCHQ and NSA monitor Internet traffic by tapping directly into the data stream sent through fiber-optic cables. They are able to copy and cache this data, to be sifted through later as needed.