Bip39 passphrase https://archerujcb329.tearosediner.net/comprehending-the-function-of-bip39-in-copyright-pocketbooks While it works by using BIP32 technique you can still import BIP39 seeds into Electrum wallet. Also apart from BIp32 There exists BIP44 version which some wallet use to the technology of seeds. In past times, bitcoin along with other copyright wallets were being develop... https://keybookmarks.com/story20469486/bip39-react-native-bip39-npm-no-further-a-mystery-https-t-me-bip39-chat