Bip39 Seed. Is passphrase similar to PIN? No, a passphrase will not be similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an extra layer of protection in your wallet that works together with your seed phrase to encrypt and secure your wallet. A PIN, On https://bookmarkalexa.com/story4551033/bip-39-https-linktr-ee-bip39-bip39-words-fundamentals-explained