Bip39 Seed Phrase. Is passphrase the same as PIN? No, a passphrase will not be similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an additional layer of protection to the wallet that works together with your seed phrase to encrypt and secure your wallet. https://letsbookmarkit.com/story19595687/bip39-generator-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic