Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase just isn't similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an additional layer of security in your wallet that actually works together with your seed phrase to encrypt and secure your wallet. A PIN, https://1001bookmarks.com/story18711647/bip39-https-linktr-ee-bip39-a-review-of-bip39-words