{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do hash values in blockchain ensure the integrity and security of data?","a":"One-wayness:  The hash algorithm has one-wayness, which means that we can obtain a fixed hash value through input data but cannot retrieve the original data through the hash value. This characteristic ensures the security of the data in the blockchain, because even if someone obtains the hash value, they cannot easily crack the original data."}]}],"pr":"3a77486bc828032226b41d3034fc137b84a2711675820c8a9b517ea3d3bb2b28"}