What do you mean, "end-to-end encryption"? How should contacts/events be transferred encrypted from/to a CalDAV/CardDAV server? Those servers expected icals and vcfs, not encrypted data.
I don't know myself, this is just what i gathered from the README. It might be possible that they're still producing valid iCalendar and VCARD files, but with a lot of ciphertext in them.
That might be, but then CalDAV/CardDAV would be reduced to WebDAV, so it would only be a WebDAV-Sync (because the server couldn't reply to CalDAV requests like "show me events between xx and yy"). As far as I have seen, Flock only "encrypts" the connection, say, is using SSL. But please correct me if I'm wrong!
It specifically states that it does end-to-end-encryption (which is not SSL). I know the authors, and IMO they're not the kinda guys who throw around with buzzwords.
