{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the limitations and challenges of blockchain technology?","a":"51% Attack:  If 51% of the nodes in the blockchain network are maliciously controlled, attackers can modify the blockchain data, posing a significant challenge to cybersecurity."}]}],"pr":"430d88f6eff7ab6aecb04bd6b0366e4902fe89f0bb2cb01c7d5577188954b484"}