Bip39 Checksum. Is passphrase similar to PIN? No, a passphrase is not similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of security in your wallet that actually works along with your seed phrase to encrypt and guard your wallet. A PIN, https://getsocialnetwork.com/story4471265/bip39-wallets-https-linktr-ee-bip39-not-known-factual-statements-about-ian-coleman-bip39