Bip39 Checksum. Now, at the following amount we use these getting and change key bunch to create unique private keys. Use the above mentioned produce non-public keys and chain code and pass them to the above pointed out functionality kchild = kpar + hash(Kpar, cpar, i) to create unique keys. https://optimusbookmarks.com/story18622917/bip39-generator-https-linktr-ee-bip39-what-does-ian-coleman-bip39-mean