Bip39 Vs Slip39. Is passphrase the same as PIN? No, a passphrase is not similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of protection in your wallet that actually works along with your seed phrase to encrypt and shield your wallet. https://toplistar.com/story20600313/bip39-words-https-linktr-ee-bip39-a-review-of-bip39-generator