Bip39 java https://www.bitsdujour.com/profiles/wWbptt You then choose to empower BIP-39 passphrase guidance inside your components wallet and stamp the passphrase(s) with a hexagonal chrome steel rod and retail store the rod in the separate geographical spot to the 24-word seed backup to be able to: BIP32 and BIP44 do the job https://bookmarkhard.com/story20348282/bip39-wallet-app-bip39-passphrase-generator-options-https-linktr-ee-bip39