{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the security challenges faced by the blockchain?","a":"Node Security: The security of nodes in the blockchain network is threatened, which may lead to the decrease of the  overall security of the network. Malicious nodes may initiate attacks, attempting to disrupt the consensus mechanism of the blockchain or spread false information."}]}],"pr":"42fa877dfe2aea9532d42c54348fa64728248f654379e7ba6c76807ae0591b80"}