{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Why is blockchain considered a secure technology?","a":"Immutable data: Blockchain uses encryption algorithms to ensure the authenticity and integrity of the data. Each data block contains the hash value of the previous block, forming a chain structure. Once the data in a block is modified, it will cause the hash value in the subsequent  blocks to change, making it difficult to tamper with the data. This ensures that once the data is recorded in the blockchain, it cannot be altered or deleted without leaving a trace."}]}],"pr":"0e38bebd4b260d6b744699bdfd033f2bba00fea85fce296c2178daec8c331a1e"}