Formato Bip39 One illustration of manually building entropy might be flipping a coin. But if an attacker provides a coin that is weighted a little bit in favor of heads, your First supply of entropy will likely have been corrupted. Anybody else who discovers the phrase can steal the bitcoins. https://bookmarkprobe.com/story18810602/seed-phrase-generator-for-trust-wallet-the-best-side-of-seed-phrase-generator