Bip32 bip39 bip44 https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view Regardless that it utilizes BIP32 process it is possible to even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 Edition which some wallet use with the generation of seeds. How much security does a passphrase insert? A BIP39 passphra... https://getsocialpr.com/story22271708/bip39-mnemonic-generator-bip39-generator-secrets-https-dzen-ru-bip39-phrase-com