You&#x27;re right that a Merkle tree is sufficient for censorship resistance when the criteria in your linked comment are met. (I read that comment earlier and enjoyed it!)<p>So I&#x27;m changing my argument: I think key succession is very important and blockchains do it better. When you revoke a PGP key, you have to rebuild your web of trust from scratch, right? The key is your identity, and continuity is hard. With blockchains, a program is your identity. I can trust your new key immediately if the backup process your program encodes has been fulfilled.<p>PGP keys can&#x27;t be used to build identities that are as permanent and resilient as state-issued identities. Blockchains can.