When was bip39 introduced https://rylanmecp341.wpsuo.com/bip32-vs-bip39-which-is-better-for-your-copyright-demands Regardless that it uses BIP32 method you can even now import BIP39 seeds into Electrum wallet. Also besides BIp32 There is certainly BIP44 Variation which some wallet use for your generation of seeds. The amount of safety does a passphrase incorporate? A BIP39 passphrase ... https://thekiwisocial.com/story5966838/bip39-copyright-not-known-details-about-bip39-word-list-txt-https-x-com-tundra838554