Bip39 Seed Phrase. Is passphrase the same as PIN? No, a passphrase is just not similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an extra layer of protection to the wallet that actually works along with your seed phrase to encrypt and guard your wallet. https://bookmarkinglog.com/story19636172/bip39-wallet-https-linktr-ee-bip39-not-known-facts-about-bip39