{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology confirm the validity of data?","a":"Cryptographic Technology: Blockchain technology employs cryptographic algorithms (such as SHA-256) to ensure the security of data. Each block contains an encrypted hash value pointing to the previous block, forming a chain structure. To tamper with the data in a specific block, one must simultaneously tamper with all subsequent blocks."}]}]}