Not sure if something like this exist but what if you could use a system where people could subscribe to you (a bit like RSS) and get all your content (a bit li

Not sure if something like this exist but what if you could use a system where people could subscribe to you (a bit like RSS) and get all your content (a bit like newsgroups, so that a third party would have a harder time to figure out at least some of the metadata) but the recipients could only decrypt what is addressed to them personally or to a group that they are part of...