Bip39 Checksum. Is passphrase similar to PIN? No, a passphrase is not really the same as a PIN. A passphrase, in the context of Bitcoin wallets, is an additional layer of protection for your wallet that actually works alongside your seed phrase to encrypt and guard your wallet. A PIN, https://socialexpresions.com/story4173170/bip39-wallet-https-linktr-ee-bip39-top-guidelines-of-bip39-mnemonic