The only mention of X.509 on the page is a sentence saying that the protocol does not use X.509. Certainly reading it in full I did not see any usage of X.509.

The only mention of X.509 on the page is a sentence saying that the protocol does not use X.509. Certainly reading it in full I did not see any usage of X.509. So I'm not sure what you're trying to say. Not to mention, X.509 is not centralized to begin with.