I have set up a little game for /bant/. I have encoded a message using multiple methods of encryption, most easy to break. The first one to find out what the message is gets whatever is mentioned in the message. It will be a very grand prize. The game is simple, really, you just need to know about multiple common forms on encryption.
It's so long, it had to be put in a pastebin link.
Good luck!
https://pastebin.com/cAGQjCEm 