Bip39 Checksum. Is passphrase the same as PIN? No, a passphrase just isn't similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of stability on your wallet that works along with your seed phrase to encrypt and protect your wallet. A PIN, https://guidemysocial.com/story4164435/bip39-words-https-linktr-ee-bip39-bip39-words-fundamentals-explained