Feature: It should be possible to tag some facts as private, that is, tied to some public key. It should not transmit such facts in the clear; it should encryp

Feature: It should be possible to tag some facts as private, that is, tied to some public key. It should not transmit such facts in the clear; it should encrypt them for that public key. (Basically, I'd like to be able to trust it with facts that I do not want to share publicly.)