This NSA memo from 23 March 2012 presentation describes the agency’s proposal for a fourth FAA 702 certification that would allow it to target hackers “tied to malicious cyber activity”: see the New York Times article Hunting for Hackers, N.S.A. Secretly Expands Internet Spying at U.S. Border, 4 June 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.
Congressional Budget Justification summary for fiscal year 2013 from the Office of the Director of National Intelligence (ODNI): see the Washington Post article U.S. spy network’s successes, failures and objectives detailed in ‘black budget’ summary, 29 August 2013.
A Targeting Rationale document details how NSA analysts should justify their targeting decisions: see the Washington Post article NSA broke privacy rules thousands of times per year, audit finds, 15 August 2013.