when it comes to Phil Zimmermann and his pgp, i would recommend you this german thread: Phil Zimmermanns Gedanken zu PGP - Wir alle sollten sie lesen
for all others interested here is the original thread from GazetaBitcoin: Phil Zimmermann's thoughts about PGP - We all should read them

and as for the medium article by UniJoin, i'll read it in due time. sounds very interesting in any case