Bip39. Is passphrase the same as PIN? No, a passphrase is not really the same as a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of security to your wallet that actually works together with your seed phrase to encrypt and protect your wallet. https://socialicus.com/story4162359/bip39-passphrase-https-linktr-ee-bip39-about-ian-coleman-bip39