Bip39 Passphrase. Is passphrase the same as PIN? No, a passphrase isn't the same as a PIN. A passphrase, within 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 shield your wallet. A PIN, https://socialtechnet.com/story4230510/bip39-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic