Bip39 Ozon One example of manually creating entropy would be flipping a coin. But when an attacker offers you a coin that is certainly weighted a bit in favor of heads, your initial supply of entropy will likely have been corrupted. Backup: The moment created, the seed phrase is exhibited https://altbookmark.com/story20150907/bip39-passphrase-inheritance-the-fact-about-bip39-phrase-that-no-one-is-suggesting