Here are some examples of the Zero-Knowledge Proof wallet that only needs a username and password instead of private keys. @Rabble 

https://zkp-wallet.onrender.com/

https://ethereum-magicians.org/t/erc-draft-password-recovery-for-account-abstraction-wallet/14784

I’m sure Robin from ZeroSync could code stuff like this for #nostr if he had more time. 

He’s currently working on Zero-Knowledge Proofs for #bitcoin under OpenSats along with Bitstream on the side.