Stephen Downes

One of the more controversial decisions made by the developers at Bluesky in the early days was to make all data public. That is, your personal data store (PDS) could be read by anybody. In what they describe as "the biggest update to atproto since it launched", the managers of the specification behind Bluesky have created 'Atproto Spaces': "You can think of an atproto space as a miniature atproto network that can be gated so that only certain people and applications are able to access the data published in it." So, in other words, private gated personal data. Still not secure, though: "It's important to remember that spaces give you access control not confidentiality. The data in a space is readable by any user or application with access to that space, it's not encrypted." Here's an example: secretsky.