Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase is not similar to a PIN. A passphrase, in the context of Bitcoin wallets, is an extra layer of protection in your wallet that actually works alongside your seed phrase to encrypt and shield your wallet. A PIN, on https://thesocialintro.com/story4612641/bip39-mnemonic-https-linktr-ee-bip39-bip39-wallets-things-to-know-before-you-buy