Bip39 Seed. Is passphrase similar to PIN? No, a passphrase is just not similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an additional layer of security for your wallet that works along with your seed phrase to encrypt and guard your wallet. A PIN, On https://loanbookmark.com/story19097118/bip39-passphrase-https-linktr-ee-bip39-bip39-wallets-things-to-know-before-you-buy