I was thinking about this while trying to use Mastadon. I don't get why I have to create an account on every Mastadon server just to read. The thing is that GPG is already a federated "user identification" system so why not use that to sign posts. And with Mastadon doing the ActivityPub thing I think GPG should spread to ActivityPub too. Think about it, this is what GPG was designed for.
The W3C DID spec enables private-key based identity in a generic way. It grew out of the ideas behind KeyBase.<p>There's a bunch of different DID methods, some of which use crypto ledgers to enable public key distribution. If that isn't what you want, the DID:key method[1] might be interesting.<p>[1] <a href="https://w3c-ccg.github.io/did-method-key/" rel="nofollow">https://w3c-ccg.github.io/did-method-key/</a>
It doesn't make sense to use GPG for anything because it's very obsolete. <a href="https://latacora.micro.blog/2019/07/16/the-pgp-problem.html" rel="nofollow">https://latacora.micro.blog/2019/07/16/the-pgp-problem.html</a>