Bip39 Vs Slip39. Is passphrase similar to PIN? No, a passphrase is 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 protect your wallet. A PIN, https://thejillist.com/story8763197/bip39-passphrase-https-linktr-ee-bip39-helping-the-others-realize-the-advantages-of-bip39