Bip39 Word List copyright One illustration of manually making entropy could be flipping a coin. But if an attacker offers you a coin that is definitely weighted a little bit in favor of heads, your Preliminary source of entropy should have been corrupted. They don't shop immediately own details, but https://socialupme.com/story4135220/phrase-creator-the-smart-trick-of-bip39-word-list-that-no-one-is-discussing