{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain be applied in the field of digital identity authentication?","a":"Uniqueness and authenticity: Through biometric  recognition technologies (such as fingerprints, facial recognition, etc.), blockchain can ensure the uniqueness and authenticity of digital identities."}]}],"pr":"50e6ad2e3709f48a97488d71fa3f20ceceea2fee6379797082f648e1fd191a18"}