Bip39 seed phrases https://sergiouwfc622.fotosdefrases.com/exactly-how-to-generate-a-bip39-seed-a-step-by-step-guide Although it utilizes BIP32 strategy you can even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There exists BIP44 Variation which some wallet use for that era of seeds. It's easy — if you don't worry about copyright inheritance, nobody else will — https://bookmarkquotes.com/story20792246/bip39-bitcoin-core-bip39-checksum-an-overview-https-cutt-ly-uryc5rw7