Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase isn't the same as a PIN. A passphrase, during the context of Bitcoin wallets, is an extra layer of protection towards your wallet that actually works along with your seed phrase to encrypt and protect your wallet. A PIN, https://social40.com/story4516361/bip-39-https-linktr-ee-bip39-a-simple-key-for-bip39-unveiled