{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the differences between blockchain and centralized databases?","a":"The main differences between blockchain and centralized databases are decentralization, data security, and transparency. Blockchain is a  decentralized database technology that achieves its decentralized feature by distributing data across numerous computer nodes. Each node stores the complete blockchain data, and only after obtaining the consent of more than half of the nodes can the data in the blockchain be modified. This makes the blockchain highly secure and transparent because it is very difficult to tamper with the data in the blockchain. In addition, blockchain adopts a consensus mechanism to validate and record new transactions, ensuring the authenticity and consistency of the data.\n\nIn contrast, centralized databases rely on a centralized server."}]}],"pr":"b0a26d3d6d62a56b5231252dd3423d9c4da9e5767160008f1d259a8e00f27387"}