{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain be applied to digital identity authentication?","a":"Biometrics: Blockchain technology can combine biometric technologies such as fingerprints and facial recognition to ensure the uniqueness and authenticity of digital identities. When users register, biometric technologies are used to obtain characteristic information of the users, and store it on the chain. During the authentication process, the information is retrieved and compared to verify the user's identity."}]}],"pr":"f4c4efd543b6ddac1788814cc57358ea733fdec2808bbcddddefdaf616e7ee24"}