Bip39 Seed Phrase. Is passphrase the same as PIN? No, a passphrase will not be similar to a PIN. A passphrase, in the context of Bitcoin wallets, is an extra layer of safety for your wallet that actually works together with your seed phrase to encrypt and shield your wallet. https://bookmarkfly.com/story19557047/bip39-https-linktr-ee-bip39-bip39-words-an-overview