{"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":"935e6c11e30663353fe819b5f7e42196ab7f94122f613fed7ac5508305a3d094"}