schizanon, In #Web1 you proved your #identity with #DNS.
In #Web2 you proved your identity with someone else's DNS (i.e. #Facebook, #Google, #Twitter) using #OAuth
In the #Fediverse you prove your identity with OAuth on someone else's DNS, just like Web1 and Web2.
In #Web3 you prove your identity with #cryptography, and without DNS!