{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the vulnerabilities and security issues of blockchain?","a":"Consensus algorithm vulnerabilities: The consensus algorithm in blockchain systems is crucial for ensuring decentralization and  security. However, the consensus algorithm itself may have vulnerabilities, such as the energy consumption problem of the Proof of Work (PoW) algorithm."}]}],"pr":"2c681c71fd09a601dd2896f6f0f4d8d4f90f26a6718b6d5f2be92439f591fd13"}