Just a pointer, but something like Plainsight[1] may give you some ideas. You could agree on a source text with your friends in an out-of-band way, then everyo

Just a pointer, but something like Plainsight[1] may give you some ideas. You could agree on a source text with your friends in an out-of-band way, then everyone just has to go and download whatever book/song/etc that you agree on in order to decode your articles. Anybody who isn't 'in-the-know' will just see gibberish. [1] https://github.com/rw/plainsight https://github.com/rw/plainsight