{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is permission control ensured in a blockchain?","a":"Consensus mechanism: The consensus mechanism in blockchain networks (such as proof of work and proof of stake) controls node joining and data packaging. The consensus mechanism requires that nodes in the network perform certain calculations or tasks to prove their credibility before they can participate in the blockchain network. This mechanism ensures that only legitimate nodes can participate in the network and  validate transactions."}]}],"pr":"93a274af2554b0ac7500e672182d84cf7bfac3a6dfaed58c4ac1571a307d34bf"}