Bip39 Tool. Is passphrase similar to PIN? No, a passphrase just isn't similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of protection for your wallet that actually works along with your seed phrase to encrypt and protect your wallet. A PIN, https://get-social-now.com/story4110587/bip-39-https-linktr-ee-bip39-5-essential-elements-for-bip39-word-list