Bip32 and bip39 https://jaspermuxp089.yousher.com/top-5-online-bip39-generators-for-effortless-copyright-security While it employs BIP32 strategy you may still import BIP39 seeds into Electrum wallet. Also aside from BIp32 There exists BIP44 Model which some wallet use for that generation of seeds. BIP39 simplifies critical administration by changing extensive cryptographic informatio... https://bookmarkingace.com/story20007275/bip39-online-wallet-bip39-generator-secrets-https-dzen-ru-bip39-phrase-com