Bip39 Wallet. Is passphrase similar to PIN? No, a passphrase is not really the same as a PIN. A passphrase, within the context of Bitcoin wallets, is an extra layer of stability to the wallet that works alongside your seed phrase to encrypt and protect your wallet. A PIN, On https://infopagex.com/story4374231/bip39-mnemonic-https-linktr-ee-bip39-bip39-words-an-overview