Bip39. Now, at the following stage we use these receiving and change critical bunch to deliver personal private keys. Use the above mentioned deliver private keys and chain code and move them to the above mentioned pointed out operate kchild = kpar + hash(Kpar, cpar, i) to deliver individual keys. https://techonpage.com/story4475640/bip39-list-https-linktr-ee-bip39-top-guidelines-of-bip39-passphrase