“Key rotation is something that we have to figure out if Nostr is going to succeed in the long term. There have been some proposals, but none of them have gained enough traction to be implemented. Key rotation is an inherently difficult problem, because you need to borrow the reputation of the old key in order to validate the new key in such a way that an attacker wouldn't be able to do the same thing. Decentralized identifiers (DIDs) are not really a solution because they result either in a circular system of keys or dependence upon a trusted name registrar. Hierarchical keys have the same problem; the root key still has to be competently secured.”