公开选举代表投票的DAG共识机制

DAG Consensus Mechanism of Open Election Representative Voting

区块链作为一种创新型的分布式账本技术,以其去中心化、可追溯、防篡改等特性,在未来许多行业中具有广泛的应用前景.但现有单链式结构的区块链存在并发低、高延迟等问题.一种基于有向无环图(directed acyclic graph,DAG)结构的新型账本技术的出现有望突破传统区块链的性能瓶颈,但目前基于DAG型区块链系统的共识机制并不成熟.本文针对典型DAG型区块链系统Nano网络的ORV共识机制存在的安全性问题进行改进,提出了一种基于代表选举模型的公开选举代表投票共识机制,即OERV(open election representative voting).使主要代表节点的权益得到了分散,增强了去中心化程度,提高了网络安全性.实验结果表明,OERV算法性能高效,能够在不牺牲系统效率的同时增强系统的稳定性和安全性,对于推动DAG型区块链共识机制的研究有着重要的现实意义.

As an innovative distributed ledger technology,a Blockchain has broad application prospects in many industries due to its features of decentralization,traceability,and tamper resistance.However,the existing single-chain structure of Blockchains faces problems such as low concurrency and high latency.The emergence of a new ledger technology based on the directed acyclic graph(DAG)structure is expected to break through the performance bottleneck of traditional Blockchains,but the current consensus mechanism based on the DAG-based Blockchain system is not mature.This study improves the security problems in the open representative voting(ORV),a consensus mechanism of the Nano network for the typical DAG-based Blockchain system,and proposes a consensus mechanism of open election representative voting(OERV)based on the representative election model.The rights and interests of the main representative nodes are dispersed;the degree of decentralization is enhanced,and the network security is improved.The experimental results reveal that the OERV algorithm has high performance and can enhance the stability and security of the system without sacrificing system efficiency.It is of practical significance for promoting the research on the consensus mechanism of DAG-based Blockchains.