This June 2010 NSA presentation for the SIGDEV conference describes efforts to trace a suspected Chinese cyber attack: see the Der Spiegel article The Digital Arms Race: NSA Preps America for Future Battle, 17 January 2015.

This 7 February 2010 NSA presentation outlines techniques to “discover, understand, evaluate, and exploit foreign CNE/CNA exploits”: see the Der Spiegel article The Digital Arms Race: NSA Preps America for Future Battle, 17 January 2015.

This undated NSA presentation describes the process of Fourth Party collection – “I drink your milkshake”: see the Der Spiegel article The Digital Arms Race: NSA Preps America for Future Battle, 17 January 2015.

This undated NSA presentation describes how to perform attacks against VPNs: see the Der Spiegel story Prying Eyes: Inside the NSA’s War on Internet Security, 28 December 2014.

This 40-page NSA presentation for the June 2012 SIGDEV conference includes a ranking of cryptographic protocols in order of ‘risk’ the they pose to the agency’s operations: see the Der Spiegel story Prying Eyes: Inside the NSA’s War on Internet Security, 28 December 2014.

This 27-page NSA document, authored by a consultant from contractor Booz Allen Hamilton, provides a step-by-step guide to using XKeyScore, together with screenshots: see the Intercept article XKEYSCORE: NSA’s Google for the World’s Private Communications, 1 July 2015.

This undated NSA document provides a decision tree for the analysis of email addresses, IP addresses, cookies and phone numbers in XKeyScore and other agency tools: see the Intercept article XKEYSCORE: NSA’s Google for the World’s Private Communications, 1 July 2015.

This NSA presentation from 15 October 2009 explains how analysts can exploit the products of the agency’s CNE hacking operations within XKeyScore and provides examples with screenshots: see the Intercept article XKEYSCORE: NSA’s Google for the World’s Private Communications, 1 July 2015.

This NSA presentation from April 2009 explains how analysts can make use of document metadata available through XKeyScore, together with worked examples and screenshots: see the Intercept article XKEYSCORE: NSA’s Google for the World’s Private Communications, 1 July 2015.