Bip39 Ian Coleman. Is passphrase the same as PIN? No, a passphrase is not really similar to a PIN. A passphrase, in the context of Bitcoin wallets, is an additional layer of security in your wallet that actually works along with your seed phrase to encrypt and shield your wallet. https://bookmarkspiral.com/story18885305/bip39-word-list-https-linktr-ee-bip39-a-secret-weapon-for-bip39-mnemonic