Bip39 recovery phrase https://papaly.com/1/eMEf Although it works by using BIP32 technique you may however import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There is certainly BIP44 Variation which some wallet use to the technology of seeds. Just how much security does a passphrase add? A BIP39 passphrase https://doctorbookmark.com/story20878760/bip39-derivation-path-indicators-on-bip39-ian-coleman-you-should-know-https-t-me-bip39-chat