Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase is not really the same as a PIN. A passphrase, while in the context of Bitcoin wallets, is an additional layer of security for your wallet that works along with your seed phrase to encrypt and shield your wallet. https://extrabookmarking.com/story18773750/bip39-wallets-https-linktr-ee-bip39-getting-my-bip39-passphrase-to-work