Bip39 key https://giphy.com/channel/ebliciwsah Regardless that it works by using BIP32 approach you'll be able to still import BIP39 seeds into Electrum wallet. Also apart from BIp32 There is certainly BIP44 Edition which some wallet use to the generation of seeds. The amount protection does a passphrase increase? A BIP39 passphrase https://josuejnub341.image-perth.org/the-future-of-copyright-security-why-bip39-issues-for-every-person