Bip39 https://franciscougju442.bravesites.com/entries/general/Produce-Bitcoin-Addresses-from-Seed-Every-Little-Thing-You-Required-to-Know Regardless that it makes use of BIP32 strategy you may nonetheless import BIP39 seeds into Electrum wallet. Also besides BIp32 There's BIP44 version which some wallet use for the generation of seeds. How much security does a passphrase increase? A B... https://pukkabookmarks.com/story20070944/bip39-finder-the-smart-trick-of-bip39-wallet-that-no-one-is-discussing-https-dzen-ru-bip39-phrase-com