Bip39. Is passphrase similar to PIN? No, a passphrase is not really the same as a PIN. A passphrase, from the context of Bitcoin wallets, is an additional layer of protection to the wallet that actually works together with your seed phrase to encrypt and protect your wallet. A PIN, https://businessbookmark.com/story4519574/bip39-wallets-https-linktr-ee-bip39-about-ian-coleman-bip39