Bip39 Seed. Is passphrase similar to PIN? No, a passphrase just isn't similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an extra layer of protection for your wallet that actually works along with your seed phrase to encrypt and guard your wallet. A PIN, on https://tinybookmarks.com/story19363855/bip39-passphrase-https-linktr-ee-bip39-a-review-of-bip39-word-list-pdf