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 safety on your wallet that works along with your seed phrase to encrypt and secure your wallet. https://listfav.com/story20275918/bip39-https-linktr-ee-bip39-about-ian-coleman-bip39