Perhaps you shouldn’t rely on PDF encryption (it’s broken)
PDF encryption is broken. Here's why and what you can do about it.
How to set up PGP WKD (Web Key Directory)
Brief Today I'll show you how to set up PGP WKD (Web Key Discovery), to easily distribute your public key, so that anyone who has your email address will be able to get your public key (in some cases automatically) while being reasonably sure that it's the real key. Requirements [...]