Bip39 Seed. Is passphrase similar to PIN? No, a passphrase just 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 actually works alongside your seed phrase to encrypt and protect your wallet. A PIN, Alternatively, https://bookmarkspedia.com/story4184541/bip39-wallet-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic