Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase isn't similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an additional layer of security to the wallet that actually works together with your seed phrase to encrypt and defend your wallet. A PIN, On https://extrabookmarking.com/story19520515/bip39-mnemonic-https-linktr-ee-bip39-a-review-of-bip39-words