Usernames (venmo, twitter, instagram, etc..) and domain names, but they don't have to be owned by a trusted third party. They can't be taken away and can be used without permission. It's like getting rid of banks and the fed reserve, but for naming.

Even the encrypted traffic you use to submit to https://stacker.news is signed by someone else's keys (not the owner of this site). It requires the use of a trusted 3rd party certificate authority

Spaces fixes this