Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase is just not the same as a PIN. A passphrase, from the context of Bitcoin wallets, is an extra layer of protection on your wallet that actually works together with your seed phrase to encrypt and safeguard your wallet. https://socialwebconsult.com/story4941525/bip-39-https-linktr-ee-bip39-the-2-minute-rule-for-bip39-word-list