Bip39 Word List Numbers. Is passphrase similar to PIN? No, a passphrase is not really similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an extra layer of stability on your wallet that actually works along with your seed phrase to encrypt and safeguard your wallet. https://bookmarkleader.com/story19602011/bip39-wallets-https-linktr-ee-bip39-5-easy-facts-about-bip39-generator-described