I'm currently working on the concept for an app for messages that is impossible to decrypt
I'm calling it 'FU.EU' if I can get it up and running.
In effect you take a message, paste it through an offline app that has a randomised encryption that's made up of 20 different possible methods combined and then paste it back into your messages. It becomes complete gibberish until the other person runs it through their app
BUT only you and the person you link the contact to has this very particular combination. It never accurately decrypts if sent to anyone else.
There are other possible failsafes such as
1. App logo and app name can be changed to anything or made invisible completely
2. Adding a code thats tied to your phone's password system so if you intentionally input a certain incorrect password, it wipes the app
3. Auto delete sent history
If I can get this into the proof of concept stage I'll set up a crowd fund and get this running.