It might be or it might not, but my god that article sucked. Way too general, and not specific enough. The picture was obviously wrong, If you encrypt an image, it looks like the option on the right produced by perfect randomness. You could not tell the difference between the two. Unless they are using some really dumb encryption method that highly depends on perfect randomness somehow. I'm not aware of what that might be, but no one should use it. Obviously even if this is a source of perfect randomness, you can of course Man in the middle the data and subtly shift it without anyone being able to tell.