By Bill Marczak1, 2, 3, Nicholas Weaver2, 3, Jakub Dalek1, Roya Ensafi4, David Fifield3, Sarah McKune1, Arn Rey, John Scott-Railton1, Ron Deibert1, and Vern Paxson2, 3 [1] Citizen Lab, Munk School of Global Affairs, University of Toronto [2] International Computer Science Institute [3] University of California, Berkeley [4] Princeton University April 10, 2015 This post describes our analysis of Ch