Bip39 Seed Generator. Is passphrase similar to PIN? No, a passphrase is not really similar to a PIN. A passphrase, within the context of Bitcoin wallets, is an extra layer of protection towards your wallet that works together with your seed phrase to encrypt and guard your wallet. A PIN, https://nimmansocial.com/story8926783/bip-39-https-linktr-ee-bip39-bip39-words-an-overview