Bip39 algorithm https://andersonehmh757.timeforchangecounselling.com/getting-your-first-bip39-passphrase-idea Even though it utilizes BIP32 technique you could nonetheless import BIP39 seeds into Electrum wallet. Also besides BIp32 You can find BIP44 Edition which some wallet use for that era of seeds. BitBox02 - A successor for the BitBox sequence, this hardware wallet supports BIP39... https://mediasocially.com/story5476940/paper-wallet-bip39-not-known-details-about-bip39-generator-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw