Bip39 mnemonic checksum https://www.gamespot.com/profile/pothirpeib/ While it uses BIP32 approach it is possible to still import BIP39 seeds into Electrum wallet. Also besides BIp32 There's BIP44 Model which some wallet use with the technology of seeds. BitBox02 - A successor for the BitBox sequence, this components wallet supports BIP39 seed phrases https://gatherbookmarks.com/story20851607/bip39-brute-5-tips-about-bip39-standard-you-can-use-today-https-cutt-ly-uryc5rw7