{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology improve the security of digital identity authentication?","a":"Data immutability: Blockchain technology has the characteristic of data immutability, and any attempt to tamper with identity authentication data will be recognized  and rejected by the system. This ensures the authenticity and credibility of identity authentication data."}]}],"pr":"ef447b96e893b38a3c083cc06345d490958957939ef3a281a427b665e709262a"}