{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The core security mechanism of blockchain is what?","a":"The core security mechanism of blockchain is the consensus mechanism. The consensus mechanism is a process in distributed systems that achieves data consistency and reaches a consensus agreement on a proposal in networks involving multiple unreliable nodes. In blockchain,  the consensus mechanism ensures that all nodes in the network reach a consensus on the validity of transactions and data, thus ensuring the security and decentralized characteristics of the blockchain. Mainstream consensus mechanisms include Proof of Work (PoW) and Proof of Stake (PoS) etc. Different consensus mechanisms have their own advantages and disadvantages, such as the PoW mechanism being suitable for systems with high security requirements and capable of preventing Sybil attacks, but it also has high energy consumption and is less efficient."}]}],"pr":"292122f5dfd98f640de65597d949b9250b706235955cef3def928ec10d3ad009"}