Bip39 mnemonic checksum https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide You then plan to permit BIP-39 passphrase support as part of your hardware wallet and stamp the passphrase(s) with a hexagonal chrome steel rod and shop the rod in a very independent geographical spot to the 24-word seed backup so that you can: BIP32 and BIP44 https://bookmarkprobe.com/story20325243/bip39-split-mnemonic-the-fact-about-bip39-word-list-github-that-no-one-is-suggesting-https-linktr-ee-bip39