Bip39 Checksum. Is passphrase similar to PIN? No, a passphrase will not be similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of safety to the wallet that works together with your seed phrase to encrypt and safeguard your wallet. A PIN, https://peakbookmarks.com/story19101245/bip39-generator-https-linktr-ee-bip39-bip39-words-fundamentals-explained