{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the digital identity authentication technologies in blockchain?","a":"Zero-knowledge Proof: Zero-knowledge proof technology allows users to prove that they  possess certain qualifications without revealing any personal information."}]}],"pr":"e61b61c0cdb9bce893c7e294b4bd2e18568c84eb743a9a55af6d4f81442b1d31"}