Bip39 Seed Phrase. 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 for your wallet that works alongside your seed phrase to encrypt and defend your wallet. A PIN, On https://bookmarkshq.com/story21142401/bip39-wallet-https-linktr-ee-bip39-a-secret-weapon-for-bip39-mnemonic