I don't think very many people need that much security when sending messages
The idea isn't about security. It's a method of creating a facebook alternative which isn't going to grow an incentive to be full of ads and tracking once the userbase moves.
Suppose I need send secure messages in a easy straighforward way. A forum just to schedule meetings and some private info, for example.
Is there any --very easy-- usable non instant message project out there?