Bip39 Passphrase. Now, at another degree we use these receiving and change essential bunch to produce unique personal keys. Use the above mentioned create private keys and chain code and move them to the above mentioned talked about operate kchild = kpar + hash(Kpar, cpar, i) to produce individual keys. https://bookmarkcolumn.com/story18849107/bip39-passphrase-https-linktr-ee-bip39-the-2-minute-rule-for-bip39-word-list