Bip39 https://franciscougju442.bravesites.com/entries/general/Produce-Bitcoin-Addresses-from-Seed-Every-Little-Thing-You-Required-to-Know Abra - A mobile wallet that supports BIP39 seed phrases, providing each wallet and Trade options for cryptocurrencies. As opposed to standard wallets derived exclusively from the seed phrase, passphrase-shielded wallets are hidden from simple sight.... https://www.youtube.com/channel/UCUpxfyTJ0fb78SQ55hU6OCw