Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase is just not similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an additional layer of safety in your wallet that works along with your seed phrase to encrypt and protect your wallet. A PIN, https://travialist.com/story8832349/bip39-mnemonic-https-linktr-ee-bip39-bip39-words-secrets