Bip39 combinations https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide Though it utilizes BIP32 strategy you can nevertheless import BIP39 seeds into Electrum wallet. Also besides BIp32 There exists BIP44 version which some wallet use for the era of seeds. BIP39 simplifies key management by replacing long cryptographic details with uncomplicated-to-use wo... https://topsocialplan.com/story5567206/bip39-release-date-examine-this-report-on-bip39-vs-slip39-https-x-com-tundra838554