They are basically copied from thetop of
http://orgmode.org/worg/org-tutorials/encrypting-files.html

The first line loads epa-file (epa-file.el --- the EasyPG Assistant,
transparent file encryption )

The second line looks like a way to call epa-file-enable if it hasn't been
enabled. You can just call epa-file-enable, and it does the check too, but
this probably avoids a minibuffer message when it is already loaded. I
think this function provides a handler for files ending in .gpg which need
to be en/decrypted by gpg.

John

-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu


On Fri, Aug 14, 2015 at 4:01 AM, Sebastien Vauban <sva-news@mygooglest.com>
wrote:

> Hello John,
>
> > Here is the setup I have that worked when I tried it last ;)
> >
> > ;; encryption
> > (require 'epa-file)
> > (unless (memq epa-file-handler file-name-handler-alist)
> >   (epa-file-enable))
>
> Do you remember what are those 2 lines for?
>
> Best regards,
>   Seb
>
> --
> Sebastien Vauban
>
>
>