Does anyone know about encrypted messages?

How do you create a paper key for encrypted messages?

Do you mean like a PGP key for an encrypted email message?

Yeah. You private messaged me something and I can’t access because either I don’t know my PGP key or because I don’t have one set up. Either way, I can’t access anywhere to set it up.

Oh, I got that sorted.
As for the key - I believe you need to go into your account settings → Security and enable it from there.

I’m not too familiar with this so it might be the wrong way to do it