This internal briefing dated 29 January 2013 provides talking points for the NSA Director on improving cooperation with Japan in the cyber realm : see the Intercept article Japan Made Secret Deals With The NSA That Expanded Global Surveillance, 24 April 2017.
This 16 August 2012 article from the internal NSA newsletter SIDToday “SIGINT Philosopher” column, considers how analysts should tackle the situation where they cannot fully answer the questions they are tasked with: see the Intercept article The Philosopher of Surveillance, 11 August 2015.
This 2010 presentation and speaking notes from the NSA’s Office of Legal Counsel explains the legal authorities governing the agency’s computer network operations (CNO) activities: see the New York Times article Hunting for Hackers, N.S.A. Secretly Expands Internet Spying at U.S. Border, 4 June 2015.
This 2010 NSA presentation describes Project Camberdada, an attempt to subvert popular antivirus software by means of surveilling email traffic: see the Intercept article Popular Security Software Came Under Relentless NSA and GCHQ Attacks, 22 June 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 September 2008 newsletter from the National Information Assurance Research Laboratory (NIARL), an unit within the NSA’s Research Directorate gives an indication of the agency’s progress with cryptanalysis – which, with “only a handful of in-house techniques” – appears to be modest: see the Der Spiegel story Prying Eyes: Inside the NSA’s War on Internet Security, 28 December 2014.
This NSA classification guide dated 1 February 2010 details the sensitivity of particular aspects of the joint NSA/Department of Defense Crytographic Modernization Program: see the Der Spiegel story Prying Eyes: Inside the NSA’s War on Internet Security, 28 December 2014.