Bip39-Standalone. Is passphrase similar to PIN? No, a passphrase isn't similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of protection in your wallet that works alongside your seed phrase to encrypt and protect your wallet. A PIN, On the flip side, https://getsocialnetwork.com/story4225235/bip39-wallets-https-linktr-ee-bip39-a-simple-key-for-bip39-unveiled