This NSA presentation from October 2009 explains how XKeyScore automatically extracts phone numbers from intercepts: see the Intercept article XKEYSCORE: NSA’s Google for the World’s Private Communications, 1 July 2015.
This NSA presentation from May 2009 describes the procedure for analysing phone data within XKeyScore: see the Intercept article XKEYSCORE: NSA’s Google for the World’s Private Communications, 1 July 2015.
This 26-page NSA document, originally presented at 2012’s Five Eyes SIGDEV conference, gives a detailed overview of the agency’s information gathering on world mobile phone networks. Some intercepted technical and contact details have been redacted: see the Intercept article
Operation Auroragold: How the NSA Hacks Cellphone Networks Worldwide, 4 December 2014.
This NSA presentation from May 2010 describes the kinds of information the agency can extract from smartphone traffic, describing the use of mobile apps as a “golden nugget”. Note that this is the first version of this document released online: see the Pro Publica article Spy Agencies Probe Angry Birds and Other Apps for Personal Data, 27 January 2014.
This 32-page NSA presentation dated 25 February 2008 details XKeyscore, a tool used to search unfiltered internet traffic in real time. Two slightly different versions of this presentation have been published; both follow below: see the Guardian article XKeyscore: NSA tool collects ‘nearly everything a user does on the internet’, 31 July 2013.