Most of the focus surrounding former NSA analyst Edward Snowden has been regarding the actual information he leaked to the media, not on how these folks are actually doing that. Snowden, as you likely imagined, takes precautions in order to ensure his internet communications remain private, one of which is the use of a customized version of Linux known as Tails.
more here.....http://www.techspot.com/news/56411-heres-the-security-software-snowden-is-using-to-evade-the-nsa.html#commentsOffset
more here.....http://www.techspot.com/news/56411-heres-the-security-software-snowden-is-using-to-evade-the-nsa.html#commentsOffset