Bip39 Seed Phrase. Is passphrase the same as PIN? No, a passphrase is not the same as a PIN. A passphrase, while in the context of Bitcoin wallets, is an additional layer of protection in your wallet that works together with your seed phrase to encrypt and safeguard your wallet. https://socialbuzzfeed.com/story4819010/bip-39-https-linktr-ee-bip39-a-secret-weapon-for-bip39-mnemonic