Bip39 Seed Phrase. Is passphrase similar to PIN? No, a passphrase just isn't the same as a PIN. A passphrase, during the context of Bitcoin wallets, is an extra layer of safety to your wallet that actually works alongside your seed phrase to encrypt and secure your wallet. A PIN, https://webnowmedia.com/story4008384/bip39-mnemonic-https-linktr-ee-bip39-5-essential-elements-for-bip39-word-list