Bip39 Checksum. Is passphrase similar to PIN? No, a passphrase is just not similar to a PIN. A passphrase, inside the context of Bitcoin wallets, is an additional layer of stability towards your wallet that actually works together with your seed phrase to encrypt and guard your wallet. A PIN, https://wearethelist.com/story20632235/bip39-wallets-https-linktr-ee-bip39-top-latest-five-bip39-list-urban-news