Bip39 Wallet. Is passphrase similar to PIN? No, a passphrase is not really similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an additional layer of protection to your wallet that works along with your seed phrase to encrypt and guard your wallet. A PIN, on https://rotatesites.com/story20000265/bip39-list-https-linktr-ee-bip39-not-known-details-about-bip39-wallets