Bip39 Passphrase. Though it takes advantage of BIP32 method you are able to nevertheless import BIP39 seeds into Electrum wallet. Also besides BIp32 There may be BIP44 version which some wallet use for your era of seeds. 0 bytes By no means use a seed produced by a web site, https://louisnxhtc.dekaronwiki.com/1103490/the_anatomy_of_the_bip39_phrase_entropy_words_and_phrases_and_protection