Bip39 Translator 1 example of manually generating entropy would be flipping a coin. However, if an attacker provides you with a coin that is definitely weighted a bit in favor of heads, your initial supply of entropy may have been corrupted. So It is your choice to consider how to https://letusbookmark.com/story20190112/bip39-compatible-non-custodial-wallet-an-unbiased-view-of-seed-phrase-generator