Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase will not be the same as a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of safety to the wallet that works together with your seed phrase to encrypt and secure your wallet. https://health-lists.com/story20038091/bip39-mnemonic-https-linktr-ee-bip39-not-known-details-about-bip39-wallets