Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase just isn't similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an extra layer of protection to your wallet that works together with your seed phrase to encrypt and protect your wallet. A PIN, However, https://mylittlebookmark.com/story4806265/bip39-wallets-https-linktr-ee-bip39-bip39-wallets-things-to-know-before-you-buy