Bip39 length https://www.hometalk.com/member/176312665/elva1377050 Checksum creation: A checksum is created from this entropy using SHA-256 hashing, which can help confirm the mnemonic's integrity later. Because of the cryptographic style and design of BIP-39, a weak passphrase will not reduce the safety of the other wallets or enable reveal the seed words. https://peakbookmarks.com/story19948089/bip39-brute-force-github-not-known-factual-statements-about-bip39-mnemonic-https-t-me-bip39-chat