Bip39 Mnemonic Brute Force 1 illustration of manually creating entropy might be flipping a coin. But if an attacker provides a coin that is certainly weighted a little bit in favor of heads, your First source of entropy will have been corrupted. Some people back up their wallet seed phrases https://linkedbookmarker.com/story4164090/bip-word-list-examine-this-report-on-bip39-phrase