Bip39 Checksum. Is passphrase similar to PIN? No, a passphrase is just not similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an additional layer of safety for your wallet that works together with your seed phrase to encrypt and protect your wallet. A PIN, Alternatively, https://bookmarksurl.com/story4673997/bip39-wallet-https-linktr-ee-bip39-about-ian-coleman-bip39