{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the privacy protection mechanisms in blockchain?","a":"Anonymity mechanism: Blockchain uses pseudonyms (such as public keys and addresses)  to identify and verify participants, avoiding the exposure of real identities and thus protecting privacy."}]}],"pr":"d0ce5d6bffdbe9033a83d7b42bd30b4dc4e9f3b2bbef347385ff3562284d86d3"}