Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase just isn't similar to a PIN. A passphrase, in the context of Bitcoin wallets, is an additional layer of safety on your wallet that actually works together with your seed phrase to encrypt and defend your wallet. A PIN, https://thebookpage.com/story4147090/bip39-words-https-linktr-ee-bip39-a-simple-key-for-bip39-unveiled