{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of certificates in blockchain?","a":"Data integrity: Certificates can help ensure  that data in blockchain is not tampered with. Blockchain uses encryption algorithms to encrypt data, and certificates are used to sign the data to ensure its integrity and consistency. When data is tampered with, certificates can detect it in a timely manner."}]}],"pr":"f4a19fbb474eb6e3583ec098da345d1ffeea160cdb3602847db16276d4fe7b15"}