Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase is not really similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of security for your wallet that actually works together with your seed phrase to encrypt and guard your wallet. https://alphabookmarking.com/story19487144/bip39-word-list-pdf-https-linktr-ee-bip39-how-much-you-need-to-expect-you-ll-pay-for-a-good-ian-coleman-bip39