read the last part if you do not want to read the articleyou close all the backdoors, but there still has to be legitimate backdoors, and that is where they come through
theoretically that means the entire internet is compromised
Welcome to the Dark Net, a Wilderness Where Invisible World Wars Are Fought and Hackers Roam Free
http://www.vanityfair.com/news/2016/09/welcome-to-the-dark-net