>"Well, we are told authoritatively by people in Downing Street, in the Home Office, in the intelligence services that the Russians and the Chinese have all this information and as a result of that our spies are having to pull people out of the field because their lives are in danger."<p>"Authoritatively".<p>How can we tell if this is true or just a PR stunt? I'm naturally suspicious of anything the security services say, but can see that this could have a germ of truth.<p>I have no idea how Snowden encrypted the files, nor do I know if any people are singled out in them. Does anyone know any better?