I would caution against drawing arbitrary lines between agencies like FBA and NSA or GCHQ or the "cryptographic community" in terms of information/skills, e.g.

I would caution against drawing arbitrary lines between agencies like FBA and NSA or GCHQ or the "cryptographic community" in terms of information/skills, e.g. http://www.foreignpolicy.com/articles/2013/11/21/the_obscure_fbi_team_that_does_the_nsa_dirty_work http://www.foreignpolicy.com/articles/2013/11/21/the_obscure... It might be more accurate to conclude that information is a currency in an unregulated market: GCHQ shares with NSA who shares with FBI DITU amongst many other public and private sector customers. In a world of parallel construction, the most reasonable assumption is that anyone can be privy to anything, or at least information derived from it.