Bip39 Seed. Now, at another stage we use these receiving and change crucial bunch to deliver unique personal keys. Use the above mentioned produce private keys and chain code and move them to the above mentioned described function kchild = kpar + hash(Kpar, cpar, i) to crank out personal keys. https://infopagex.com/story4090086/bip39-wallet-https-linktr-ee-bip39-how-bip39-generator-can-save-you-time-stress-and-money