@mariusor Yes, it is like standard AP C2S (another solution for this problem), but with DID as identity root instead of server.
You register with your DID and application starts constructing objects with IDs based on it. Then you sign those objects.
This is similar to Nostr where people can simply copy-paste their secret key into a different client and start sending messages. Except with FEP-ef61 we are not limited to plain cryptographic keys, and may use more advanced identities (any kind of DID).