{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the functions of certificates in a blockchain?","a":"Data integrity: Certificates can ensure  that data in the blockchain remains unchanged during transmission and storage. Through digital signature technology, certificates can ensure the integrity and authenticity of data, preventing data from being tampered with during transmission."}]}],"pr":"a449362bed8b699ca47fb0284fe9f96a5f5dea8666cf299150d85f6f0c1d5b6c"}