Bip39 Seed. Now, at the subsequent stage we use these obtaining and change key bunch to deliver specific non-public keys. Use the above create private keys and chain code and go them to the above mentioned pointed out function kchild = kpar + hash(Kpar, cpar, i) to create unique keys. https://letsbookmarkit.com/story18734520/bip39-list-https-linktr-ee-bip39-bip39-wallets-things-to-know-before-you-buy