{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure data security?","a":"Immutable data: Blockchain adopts encryption algorithms such as SHA-256, ensuring that once data is recorded in a block, it is difficult to  tamper with. To tamper with the data in a block, an attacker needs to simultaneously attack most of the nodes in the network and complete the task in a short period of time, which is virtually impossible in practical operations."}]}],"pr":"1f74c860ba7550751fe5c8c1d9761ffb9cfd6cea6c3e6a9dcd9ceb1c6bce6566"}