Bip39 Dictionary. Is passphrase similar to PIN? No, a passphrase will not be similar to a PIN. A passphrase, from the context of Bitcoin wallets, is an extra layer of safety to the wallet that works together with your seed phrase to encrypt and guard your wallet. A PIN, on https://funny-lists.com/story20188731/bip39-mnemonic-https-linktr-ee-bip39-the-fact-about-bip-39-that-no-one-is-suggesting