Bip39 Ian Coleman. Is passphrase the same as PIN? No, a passphrase just isn't the same as a PIN. A passphrase, within the context of Bitcoin wallets, is an extra layer of security in your wallet that actually works together with your seed phrase to encrypt and secure your wallet. https://socialbuzzmaster.com/story4669799/bip39-mnemonic-https-linktr-ee-bip39-not-known-facts-about-bip39