Bip39 wallet app https://remingtonjszi611.almoheet-travel.com/using-python-to-create-a-bip39-mnemonic-a-designer-s-perspective While it uses BIP32 system you are able to still import BIP39 seeds into Electrum wallet. Also aside from BIp32 there is BIP44 Edition which some wallet use for that technology of seeds. The amount of security does a passphrase insert? A BIP39 passphrase subst... https://tetrabookmarks.com/story20565874/bip39-browser-5-essential-elements-for-bip39-word-list-pdf-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw