{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the applications of blockchain technology in digital identity verification?","a":"Public key and private key: Each user has a public key and a private key. In  the identity authentication process, users only need to use their private keys to sign, and verification personnel use the user's public key to verify the authenticity of the signature."}]}],"pr":"924e236d35131821fabbd9d96a69c856bf609e5e7e4b369792e386e1973da898"}