Bip39 Tool. Is passphrase similar to PIN? No, a passphrase is just not similar to a PIN. A passphrase, within the context of Bitcoin wallets, is an additional layer of stability to the wallet that actually works together with your seed phrase to encrypt and defend your wallet. A PIN, https://thefairlist.com/story9154269/bip39-wallets-https-linktr-ee-bip39-a-review-of-bip39-word-list-pdf