{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the advantages and disadvantages of the consensus mechanisms in blockchain?","a":"Security: The consensus mechanism makes it difficult for blockchain  to be attacked, unless the attacker can control 51% of the nodes, which is virtually impossible in practice."}]}],"pr":"02aaef8555b04d42833e4b2298e6211cfb6b4b520d48e2b51f7d9dd9414f0561"}