{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the security requirements for blockchain technology in regards to smart contracts?","a":"Data confidentiality: User information and transaction data involved in smart contracts should have  good confidentiality to prevent unauthorized access and leaks."}]}],"pr":"8160f8c1af36bb427aab35ad65d59ddb7058c193c8387b87694cb15428a26875"}