Bip39 Seed Phrase. Now, at another level we use these receiving and alter key bunch to produce specific personal keys. Use the above mentioned generate private keys and chain code and go them to the above mentioned described functionality kchild = kpar + hash(Kpar, cpar, i) to deliver personal keys. https://bookmarkrange.com/story21274794/bip39-wallet-https-linktr-ee-bip39-a-review-of-bip39-words