Bip39 Ian Coleman. Is passphrase the same as PIN? No, a passphrase is not really the same as a PIN. A passphrase, inside the context of Bitcoin wallets, is an additional layer of protection to your wallet that works along with your seed phrase to encrypt and defend your wallet. https://monobookmarks.com/story19414945/bip-39-https-linktr-ee-bip39-bip-39-no-further-a-mystery