This undated GCHQ presentation describes some of the Question Focused Databases (QFDs) developed to analyse the massive amount of raw data the agency collects from undersea cables: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This GCHQ presentation dated 14 May 2012 describes the agency receiving “more than 50 billion events [metadata records] per day” and some of the tools available for analysing that mass of data: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This GCHQ presentation from March 2009 describes the BLACKHOLE database used to store raw metadata records from TEMPORA, with about 10 billion records being added each day: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This short extract from a July 2009 GCHQ document describes BLACK HOLE, the agency’s massive respository for unselected metadata: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This undated joint GCHQ/CSEC presentation provides an overview of “exploring and exploiting leaky mobile apps”: see the Der Spiegel article The Digital Arms Race: NSA Preps America for Future Battle, 17 January 2015.

This NSA document from January 2013 lists the codenames of those agency activities sufficiently sensitive to qualify as “exceptionally controlled information”: see the Intercept article Core Secrets: NSA Saboteurs in China and Germany, 10 October 2014.ah

This presentation, prepared by GCHQ’s Joint Threat Research Intelligence Group (JTRIG) for the 2010 SIGDEV conference describes the agency’s “effects” operations – including the use of social media for propaganda purposes: see the Intercept article: The “Cuban Twitter” Scam Is a Drop in the Internet Propaganda Bucket, 4 April 2014.

This GCHQ briefing from September 2009 describes the tools then available to analyse metadata collected on a massive scale: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This page from GCHQ’s internal GCWiki, last updated on 1 May 2012 documents progress in a variety of the agency’ projects: see Facing Data Deluge, Secret U.K. Spying Report Warned of Intelligence Failure, 7 June 2016.

This page from GCHQ’s internal GCWiki describes the BLAZING SADDLES tool for handling huge amounts of metadata and the specialised analysis it supports: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This undated page from GCHQ’s internal GCWiki provides technical information about the agency’s BLACK HOLE repository: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This GCHQ research paper from 6 November 2009 outlines what kinds of data the agency can extract from internet radio stations and their listenership, grouped by country: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This GCHQ research paper dated 12 November 2010 discuss some of the agency’s attacks against iPhone handsets: see the Der Spiegel article The Digital Arms Race: NSA Preps America for Future Battle, 17 January 2015.

This GCHQ report summary from 12 March 2012 discusses the impact of the move to a “end-end big data strategy” on the agency’s infrastructure: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.

This GCHQ document from 18 August 2009 describes BLACK HOLE, a massive data repository, and describes how this interacts with other systems developed by the agency: see the Intercept article Profiled: From Radio to Porn, British Spies Track Web Users’ Online Identities, 25 September 2015.