Bip39 Seed. Is passphrase similar to PIN? No, a passphrase is just not the same as a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of protection to the wallet that works alongside your seed phrase to encrypt and shield your wallet. A PIN, https://bookmarkunit.com/story18512012/bip-39-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic