Uwe and Klaus live in Bunnyland. They want to say things to each other that the Big Bunny thinks are anti-bunny. If they say them openly, they vanish. If they are the only people to use secure comms, they can be easily targeted anyway. If every bunny uses secure comms, that fact can't be used to target Uwe and Klaus.
Aber Du verstehst wahrscheinlich sie nicht, darum versuche es auf Englisch:
Without adequate information security, those who dare to say things deemed undesirable by the powers that be, are apt to disappear. An App is not, as such, a prerequisite for security, but if that provides security, it would be an adequate solution.