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 stability in your wallet that works along with your seed phrase to encrypt and protect your wallet. https://bookmarkstime.com/story19323447/bip39-wallet-https-linktr-ee-bip39-bip39-words-an-overview