Comment by placebo

In an authoritarian regime with large masses of human and technological resources determined to have control over its population, nothing is really secure. Sending a message that can't be read by a third party? You're suspect. Have an illegal app installed on your registered "report to big brother" phone? Expect an unfriendly visit by big brother police. Don't have a "big brother" phone? There are various ways of sniffing you out. The bottom line is that while technology can help in the process, technology can't bring freedom from oppressing regimes. That is only achieved when a synchronised, large enough collection of people feel that they are willing to change things even at great personal risk. Authoritarian regimes know this, and thus put a lot of effort into using fear of consequences to suppress any hint of such development.