Bip39 Seed. Now, at the next amount we use these receiving and alter important bunch to deliver person personal keys. Use the above mentioned make private keys and chain code and move them to the above mentioned stated function kchild = kpar + hash(Kpar, cpar, i) to produce unique keys. https://thejillist.com/story9185591/bip39-passphrase-https-linktr-ee-bip39-bip39-generator-an-overview