Bip39 Checksum. Is passphrase the same as PIN? No, a passphrase just isn't similar to a PIN. A passphrase, within the context of Bitcoin wallets, is an extra layer of safety to your wallet that works along with your seed phrase to encrypt and shield your wallet. A PIN, Alternatively, https://socialtechnet.com/story5123628/bip39-https-linktr-ee-bip39-a-review-of-bip39-generator