Bip39 Seed. Now, at the next level we use these acquiring and change key bunch to crank out person private keys. Use the above mentioned create personal keys and chain code and pass them to the above stated function kchild = kpar + hash(Kpar, cpar, i) to create specific keys. https://sound-social.com/story8865261/bip-39-https-linktr-ee-bip39-not-known-details-about-bip39-wallets