Tempora

Tempora uses intercepts on the fibre-optic cables that serve as the backbone of the Internet to gain access to large amounts of Internet users' personal data, without any individual suspicion or targeting. The intercepts are placed in the United Kingdom and on the UK military base at Ayios Nikolaos in the British Overseas Territory of Akrotiri and Dhekelia. The intercepts are placed with the knowledge of companies owning either the cables or landing stations.

The existence of Tempora was revealed by Edward Snowden, a former American intelligence contractor who leaked information about the programme to former Guardian journalist Glenn Greenwald in May 2013 as part of his revelations of government-sponsored mass surveillance programmes. Documents Snowden acquired showed that data collected by the Tempora programme is shared with the National Security Agency of the United States.

Operation

According to Edward Snowden, Tempora has two principal components called "Mastering the Internet" (MTI) and "Global Telecoms Exploitation" (GTE). He claimed that each is intended to collate online and telephone traffic. This contradicts two original documents, which say that Tempora is only for Internet traffic, just like the XKeyscore system of the NSA, components of which are incorporated in Tempora.

It is alleged that GCHQ produces larger amounts of metadata than NSA. By May 2012, 300 GCHQ analysts and 250 NSA analysts had been assigned to sort data.

The Guardian claims that no distinction is made in the gathering of data between public citizens and targeted suspects. Tempora is said to include recordings of telephone calls, the content of email messages, Facebook entries and the personal Internet history of users. Snowden said of Tempora that "It's not just a U.S. problem. The U.K. has a huge dog in this fight...They [GCHQ] are worse than the U.S."

Claims exist that Tempora was possible only by way of secret agreements with commercial companies, described in Snowden's leaked documents as "intercept partners". Some companies are alleged to have been paid for their co-operation. Snowden also alleged that GCHQ staff were urged to disguise the origin of material in their reports for fear that the role of the companies as intercept partners would cause "high-level political fallout". The companies are forbidden to reveal the existence of warrants compelling them to allow GCHQ access to the cables. If the companies fail to comply they can be compelled to do so.

Lawyers for GCHQ said it would be impossible to list the total number of people targeted by Tempora because "this would be an infinite list which we couldn't manage".

GCHQ set up a three-year trial at GCHQ Bude in Cornwall. GCHQ had probes attached to more than 201 Internet links by mid-2011; each probe carried 10 gigabits of data a second. NSA analysts were brought into the trials, and Tempora was launched in 2011, with data shared with the NSA. Ongoing technical work is expanding GCHQ's capacity to collect data from new super cables that carry data at 100 gigabits a second. The data is preserved for three days while metadata is kept for thirty days.

Tempora comprises different components, like the actual access points to fibre-optic cables, a sanitisation programme codenamed POKERFACE, the XKEYSCORE system developed by NSA, and a Massive Volume Reduction (MVR) capability.

In May 2012, GCHQ had Tempora systems installed at the following locations:

• 16 for 10 gigabit/second cables at the CPC processing centre
• 7 for 10 gigabit/second cables at the OPC processing centre
• 23 for 10 gigabit/second cables at the RPC1 processing centre