{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the authenticity and effectiveness of transactions?","a":"Blockchain ensures the authenticity and effectiveness of transactions through its unique architecture and core technology. Firstly, blockchain adopts a decentralized network structure, where all participants jointly maintain the ledger, and the transaction records cannot be tampered with. Each block contains the hash value of the previous block, forming a chain structure. Once the data in a block is changed, it will cause the hash value of the subsequent blocks to change, thereby rendering the entire chain invalid. Therefore, the significance of a single node tampering with data is minimal, and changing data on the chain requires consensus from the entire network.\n\nSecondly, blockchain uses  consensus mechanisms to ensure data consistency. There are various types of consensus mechanisms,"}]}],"pr":"d92792cf02b303fc10572ca908854758a57d3cd991c1e8f05380d667571c8281"}