Bip39 Checksum. Is passphrase similar to PIN? No, a passphrase isn't the same as a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of protection on your wallet that actually works along with your seed phrase to encrypt and protect your wallet. A PIN, https://yourbookmarklist.com/story19638310/bip-39-https-linktr-ee-bip39-5-simple-statements-about-bip39-mnemonic-explained