Bip39 Checksum. Is passphrase similar to PIN? No, a passphrase is not really similar to a PIN. A passphrase, within the context of Bitcoin wallets, is an extra layer of stability towards your wallet that actually works along with your seed phrase to encrypt and defend your wallet. A PIN, https://top10bookmark.com/story18543078/bip39-mnemonic-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic