Bip39 word list trust wallet https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide Though it utilizes BIP32 system you'll be able to still import BIP39 seeds into Electrum wallet. Also other than BIp32 There is certainly BIP44 Edition which some wallet use to the era of seeds. Exactly how much security does a passphrase incorporate? A BIP39 https://socialwoot.com/story22220186/bip39-format-example-new-step-by-step-map-for-bip39-standard-https-x-com-tundra838554