Bip39 Checksum. Now, at the next level we use these getting and change key bunch to deliver specific personal keys. Use the above deliver private keys and chain code and pass them to the above mentioned stated operate kchild = kpar + hash(Kpar, cpar, i) to create unique keys. Just https://bookmarklinkz.com/story19310607/bip39-mnemonic-https-linktr-ee-bip39-the-single-best-strategy-to-use-for-bip39-wallets