kreyszig on Nostr: I meant by providing a zpub, it would still have been easy to verify the holdings, ...

I meant by providing a zpub, it would still have been easy to verify the holdings, and for them to avoid signing multiple transactions using the private key for the same address. However ODELL (npub1qny…95gx) mentioned that they would change private key and address every time any outflow occurs, so the security concern I had does not really hold anymore.