In terms of individual data sovereignty, the problem I currently see in the Fediverse is that the vast majority of users here only have limited access to their data. On the one hand, this is about the trivial need that I, as an average user, should be able to migrate to another instance entirely (in the sense of the entire content of my social graph, including the posts). On the other hand, it is about a way out of worst-case scenarios, e.g. the instance suddenly goes offline, the instance closes the migration option or defederates from the rest of the Fediverse. How can users migrate in such a case and in such a way that they take all their data with them and at the same time have the authenticity of their identity ensured? 2/11