Bip39 Seed. Now, at the following level we use these obtaining and alter crucial bunch to make unique personal keys. Use the above mentioned deliver private keys and chain code and move them to the above mentioned purpose kchild = kpar + hash(Kpar, cpar, i) to crank out individual keys. https://listbell.com/story8369687/bip39-passphrase-https-linktr-ee-bip39-how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-generator