Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase just isn't the same as a PIN. A passphrase, within the context of Bitcoin wallets, is an additional layer of protection to your wallet that works alongside your seed phrase to encrypt and secure your wallet. A PIN, However, https://socialicus.com/story4162359/bip39-passphrase-https-linktr-ee-bip39-about-ian-coleman-bip39