{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does the history block of blockchain ensure the security of data?","a":"Decentralization: Blockchain adopts a distributed network  architecture, where data is not managed by a single central node but is distributed across multiple nodes, reducing the risk of single-point failure."}]}],"pr":"6a862cb9c69b37230d33e4f100ea65e92ca97d4d51df65d643dc6d2ba32c9bad"}