Bip39 Mnemonic. Is passphrase the same as PIN? No, a passphrase is just not similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an additional layer of protection for your wallet that actually works together with your seed phrase to encrypt and shield your wallet. A https://infopagex.com/story4079197/bip39-mnemonic-https-linktr-ee-bip39-getting-my-bip39-passphrase-to-work