Bip39 Vs Slip39. Is passphrase similar to PIN? No, a passphrase is just not the same as a PIN. A passphrase, within the context of Bitcoin wallets, is an additional layer of security on your wallet that actually works along with your seed phrase to encrypt and guard your wallet. https://bookmarkeasier.com/story18624750/bip39-mnemonic-https-linktr-ee-bip39-a-simple-key-for-bip39-unveiled