Bip39 Vs Slip39. Is passphrase the same as PIN? No, a passphrase is not really similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an extra layer of protection to the wallet that actually works together with your seed phrase to encrypt and protect your wallet. https://getsocialnetwork.com/story4543836/bip39-words-https-linktr-ee-bip39-a-review-of-bip39-words