{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the challenges in protecting privacy in blockchain?","a":"Anonymity is difficult to achieve: Although encryption algorithms and addresses are used in blockchain transactions, it is difficult to  achieve complete anonymity under existing technical conditions. Through data analysis and technical means, attackers may be able to trace the identities and actions of both parties in a transaction."}]}],"pr":"ccdcf7918b85b000edaaafd1cf33371b133ef1be8bc1e2f18f0adba40e6d4823"}