Bip39 Passphrase. Now, at the following stage we use these obtaining and change important bunch to generate unique personal keys. Use the above generate personal keys and chain code and pass them to the above mentioned talked about functionality kchild = kpar + hash(Kpar, cpar, i) to deliver unique keys. https://worldlistpro.com/story21431622/bip39-https-linktr-ee-bip39-bip-39-no-further-a-mystery