Bip39 documentation https://www.symbaloo.com/mix/bookmarks-xfkm Checksum generation: A checksum is generated from this entropy working with SHA-256 hashing, which helps validate the mnemonic's integrity afterwards. Contrary to standard wallets derived only from the seed phrase, passphrase-secured wallets are concealed from simple sight. They exist inside a form of cryptographic shadow... https://bookmarklayer.com/story19904508/electrum-bip39-passphrase-bip39-npm-no-further-a-mystery-https-dzen-ru-bip39-phrase-com