{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the security of blockchain be ensured?","a":"Immutable ledger: Once data is recorded on the  blockchain, it cannot be altered or deleted. This feature ensures that any attempts to"}]}],"pr":"29a7875d218a0da2a01e9dfb7944383457a5c37d0bd2d4d7db6fc61c719703b4"}