{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure data security?","a":"Immutability of data: Blockchain adopts encryption algorithms, and each transaction contains information about the previous transaction, forming a chain-like  structure. Once the data in a block is changed, the data in subsequent blocks will also be changed accordingly, making it very difficult to tamper with the data."}]}],"pr":"6bfca83e9570ee4fe1c2d74f78dca979ebeb6875f3e0d4e833f095018308ec6f"}