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 the wallet that actually works together with your seed phrase to encrypt and protect your wallet. A PIN, https://bookmarkcolumn.com/story18887097/bip-39-https-linktr-ee-bip39-bip39-words-secrets