{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology ensure the security of transactions?","a":"Immutability: Each block contains the hash value of the previous block, forming a chain structure. Once data is recorded on the blockchain,  it is difficult to tamper with it, as this requires simultaneous modification of the data in all subsequent blocks."}]}],"pr":"d47b74e5c3ad1fcda39f770ee341039d21baabd123118a05d950b485f2b8592f"}