{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the immutability of data?","a":"As a distributed database, blockchain ensures the immutability and security of data through various means such as decentralization, cryptographic technology, timestamps, and distributed storage. Firstly, blockchain adopts a decentralized structure, eliminating a single central node and ensuring that all nodes have equal status and complete copies of the ledger. This means that any modification to blockchain data requires consensus from all nodes, ensuring that data is not tampered with by any single entity.\n\nSecondly, blockchain uses cryptographic technology to protect data security, such as employing public-private key encryption algorithms for authentication and data encryption.  Each participant possesses their own public and private keys, which allows them to securely transmit and verify data on the blockchain."}]}],"pr":"8715c7116665e1614eda99e6179ecce74666250a5c9cc54a144e2686c4a38341"}