1. Introduction
The Internet has become a critical communication infrastructure for citizens to obtain accurate information, organize political actions [1], and express dissatisfaction with their governments [2]. This fact has not gone unnoticed, with governments clamping down on this medium via censorship [3], [4], [5], surveillance [6] and even large-scale Internet take downs [7], [8], [9]–. The situation is only getting worse, with Freedom House reporting 36 of the 65 countries they survey experiencing decreasing levels of Internet freedom between 2013 and 2014 [10].