There are numerous instruments obtainable for the Linux person to encrypt a file ( https://askubuntu.com/questions/160253/encrypting-decrypting-a-single-file-in-ubuntu-12-04-lts , and so forth).

I wish to [1] encrypt a single PDF on my Linux OS, [2] electronic mail it to a non-technical person on a Mac and [3] anticipate they will simply decrypt the PDF (utilizing a password I present by “one other channel”).

Ideally, the non-technical recipient isn’t required to put in further software program. Most popular (fool-proof) options contain native-to-MacOS (built-in) capabilities or, maybe, double-clicking a password-protected “self-extracting” file … minimal expertise or pondering wanted.

My information of MacOS is skinny. Recommendations?

( Aspect query – first submit from a no-longer-virgin Stack Change person.
Ought to this have as a substitute gone to https://unix.stackexchange.com/ ?)