Bip39 Seed. Is passphrase similar to PIN? No, a passphrase just isn't similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an additional layer of security in your wallet that actually works along with your seed phrase to encrypt and defend your wallet. A PIN, Alternatively, https://bookmarkfavors.com/story5132403/bip39-wallets-https-linktr-ee-bip39-5-simple-statements-about-bip39-mnemonic-explained