Bip39 Passphrase Solana 1 example of manually making entropy can be flipping a coin. But if an attacker provides a coin that is definitely weighted marginally in favor of heads, your initial supply of entropy may have been corrupted. Be sure to remember to let Restoration from mnemonic phrases that https://travialist.com/story8878005/recovery-seed-phrase-generator-bot-how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39