Bip39 regex http://www.mediafire.com/file/uilrjfajg2ami24/pdf-14673-57158.pdf Regardless that it uses BIP32 strategy you are able to however import BIP39 seeds into Electrum wallet. Also in addition to BIp32 there is BIP44 Model which some wallet use to the era of seeds. Exactly how much protection does a passphrase incorporate? A BIP39 passphrase considerably https://allkindsofsocial.com/story6181020/bip39-brute-force-github-the-single-best-strategy-to-use-for-bip39-word-list-pdf-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw