Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase is just not the same as a PIN. A passphrase, while in the context of Bitcoin wallets, is an additional layer of stability in your wallet that works together with your seed phrase to encrypt and defend your wallet. https://bookmarksystem.com/story19163014/bip39-words-https-linktr-ee-bip39-bip39-generator-an-overview