{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of blockchain technology in privacy and security protection?","a":"Data immutability: Blockchain  uses encryption algorithms to ensure that once data is recorded in a block, it is difficult to tamper with. This helps to ensure the security of user data and transaction records, preventing fraud and tampering."}]}],"pr":"dc11b3c96c50020da11d278ce3f69e49bbba825c42b46a2d2f91eb6b396a3390"}