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> nip4 is broken cryptography that will expose your private keys. It should never be used.
Paul clarified below, but basically somebody could brute force your private key if you have sent a lot of nip04s.
https://github.com/nostr-protocol/nips/pull/715#issuecomment-1675301250
https://github.com/nostr-protocol/nips/pull/715#issuecomment-1675301250
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