{"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":"3fba53a35d8b95609359dc5d855b1dd161f5091a0f4d757c81160e0f409e57b7"}