Bip39 entropy https://www.bitsdujour.com/profiles/wWbptt While it takes advantage of BIP32 approach it is possible to however import BIP39 seeds into Electrum wallet. Also besides BIp32 There's BIP44 Model which some wallet use for that generation of seeds. What’s interesting is that every various passphrase you use With all the identical seed https://companyspage.com/story5620434/bip39-tangem-indicators-on-bip39-standard-you-should-know-https-x-com-tundra838554