Bip39 Checksum. Is passphrase the same as PIN? No, a passphrase is not similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an extra layer of safety to your wallet that actually works alongside your seed phrase to encrypt and secure your wallet. A PIN, On https://webnowmedia.com/story4233560/bip-39-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic