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 extra layer of safety for your wallet that actually works alongside your seed phrase to encrypt and defend your wallet. https://bookmarklethq.com/story18619394/bip39-passphrase-https-linktr-ee-bip39-bip39-word-list-pdf-no-further-a-mystery