I’ve been playing around with Keybase (https://keybase.io) again. While it’s still pretty nerdy in terms of knowledge requirements, they’re doing some interesting stuff with encrypted file sharing.
If you’d like to try it out, I’ve got invitations to share. Just message me your email address.
P.S.
If you believe their “We’re making this simple for everybody!” message and still find yourself confused, you’re not alone. They’re kind of oblivious to that gap right now.