Bip39n Code One example of manually creating entropy would be flipping a coin. However, if an attacker gives you a coin which is weighted a little in favor of heads, your Preliminary source of entropy may have been corrupted. Many people back up their wallet seed phrases or private keys https://kingbookmark.com/story18657407/private-key-to-seed-phrase-generator-indicators-on-seed-phrase-generator-you-should-know