{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the security and immutability of information?","a":"Blockchain ensures the security and immutability of information by using cryptographic methods and consensus algorithms. Specifically, it adopts the hash algorithm to generate unique block hashes, packages data into blocks, and links them in sequence to form an immutable chain-based data structure. Each block contains the hash value of the previous  block, giving the blockchain a cumulative characteristic. Once the data in a block is changed, the hash value of the subsequent blocks will also be altered, rendering the entire chain invalid. In addition, participants in the blockchain network (nodes) collectively maintain the entire blockchain data, and any attempt to tamper with the blockchain will be detected."}]}],"pr":"4d6cafa6ec09a6d38d098e42c6b5bbefad6ff7da5d23c33edc9506af29d3c522"}