Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase is not really similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an additional layer of safety for your wallet that works together with your seed phrase to encrypt and guard your wallet. A PIN, https://dftsocial.com/story20275531/bip39-list-https-linktr-ee-bip39-bip39-words-an-overview