Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase is not similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of protection on your wallet that works together with your seed phrase to encrypt and defend your wallet. A PIN, https://wise-social.com/story4126240/bip-39-https-linktr-ee-bip39-the-fact-about-bip39-wallets-that-no-one-is-suggesting