{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain prevent fraud in transactions?","a":"Blockchain prevents fraud in transactions through various mechanisms such as decentralization, tamper-proof data, and encryption technology. Firstly, the decentralized feature means that there is no single authoritative institution controlling transaction data, thereby reducing the risks of internal tampering and data manipulation. Secondly, blockchain  adopts encryption algorithms (such as SHA-256) to encrypt transaction data, ensuring the security and confidentiality of the data. Additionally, once transaction records are added to the blockchain, they are difficult to tamper with because it requires tampering with all subsequent blocks, which is virtually impossible in practice. Therefore, blockchain can effectively prevent fraud in transactions."}]}],"pr":"04a7173332dcaaff0cd02bbb727706462cdd7488429235c774a97ea73024a5d8"}