Bip39 Passphrase. The wallet handles the hefty lifting of changing the mnemonic words by way of a technique of sophisticated hashing, salting, and checksum functions into a binary "seed," and that is then accustomed to deliver the all-vital personal and general public encryption keys. BIP32 was the 1st seed standard https://zozodirectory.com/listings13042017/bip39-standard-https-linktr-ee-bip39-top-latest-five-bip39-mnemonic-urban-news