Bip39 Passphrase. Now, at another amount we use these receiving and change vital bunch to crank out individual private keys. Use the above deliver personal keys and chain code and move them to the above mentioned mentioned purpose kchild = kpar + hash(Kpar, cpar, i) to crank out unique keys. https://royalbookmarking.com/story19452097/bip39-wallets-https-linktr-ee-bip39-bip-39-no-further-a-mystery