Improved DPoS Consensus Mechanism Based on Hybrid Trust Model
Considering the hybrid trust model of'locally trusted,globally untrustworthy'in the end-edge-cloud architecture,this paper pro-poses an improved scheme of delegated proof of stake,named RT-DPoS(Reputation-Trust based DPoS).First of all,the reputation mecha-nism is designed to regulate nodes'behavior and augment nodes'voting motivation.Then,a voting strategy based on local trust is proposed to guide voting behavior and establish local trust relationships according to voting behavior.On this basis,considering the trust relationship and reputation value,a two-stage strategy is designed to select agent nodes so as to enhance the decentralization.Finally,a verifiable random func-tion is introduced to optimize the block order of the agent nodes to enhance the resistance to corruption attacks.The results of the experiment show that RT-DPoS can effectively mitigate blind voting,ensure the reliability and decentralization of agent nodes,and enhance the security of the consensus process.Compared with DPoS,RT-DPoS has improved security performance by 23.38%.
delegated proof of stakehybrid trustlocal trustreputation mechanismedge blockchain
万方数据
维普
