Bip39 brute force github http://www.mediafire.com/file/uilrjfajg2ami24/pdf-14673-57158.pdf Although it takes advantage of BIP32 system you may continue to import BIP39 seeds into Electrum wallet. Also in addition to BIp32 there is BIP44 Model which some wallet use with the technology of seeds. Because of the cryptographic style of BIP-39, a weak passphrase https://bookmarkspiral.com/story20188469/dbs-money-value-bip39-passphrase-generator-options-https-x-com-tundra838554