Bip39 Vs Slip39. Is passphrase similar to PIN? No, a passphrase isn't similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an additional layer of stability for your wallet that actually works together with your seed phrase to encrypt and guard your wallet. A PIN, on https://isocialfans.com/story5003189/bip39-wallets-https-linktr-ee-bip39-5-essential-elements-for-bip-39