{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What security issues are involved in blockchain?","a":"Network Security: Blockchain relies on  the Internet for communication between nodes, making it vulnerable to network attacks. For example, attackers may try to occupy user devices and steal assets by using mining viruses or other methods."}]}],"pr":"4fda6f5ee810e96d0e3ccb42bf151b8ded29e533fb198f48a18e945b8e35e221"}