The only way I see this working for the forum is if it's related to a Bitcoin address and it's signature but that could be very difficult to implement.
Verifying a signature is pretty easy to implement... But like dillpicklechips already mentioned: since the epochtalk development started, the admin hasn't done any real patching to SMF. I don't think he'll start patching again either, but i seriously wonder when epochtalk will be rolled out tough, it has been years since they first started coding.