The manufacturer can deny service to undesirables[0], by refusing to provide them with fido2s (either initial or replacement when broken). If we're willing to a

The manufacturer can deny service to undesirables[0], by refusing to provide them with fido2s (either initial or replacement when broken). If we're willing to accept targeted denial of service we might as well have the New York Times (or whoever) publish hashes and timechain-encrypted transactions for tick N alongside decrypted transactions for tick N-1; that requires less secrity and infrastructure from the central authority. 0: I could give a long list of historical examples demonstrating that is in fact a problem, but frankly, if you (think you) are not a member of any demographic that someone considers undesirables, then I consider you a undesirable.