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信息技术22年10期

基于信誉值的实用拜占庭容错改进算法研究
王启河
(华北电力大学 控制与计算机工程学院,河北 保定 071003)

摘  要:共识问题是区块链中的核心问题,针对联盟链常用的实用拜占庭容错算法(PBFT)中主节点选取随意、网络通信量大、公平性较低等问题,提出一种基于信誉值的 PBFT 改进算法。首先改变信誉值主节点选取方式,然后优化共识流程,节点的累计信誉作为判断达成共识的条件。达成共识时没有参与共识过程的节点或恶意节点的信誉值降低,降低的信誉值均分给成功参与共识的节点。经过多次共识后,故障或恶意节点对共识的影响变小,提高了算法的公平性。


关键词:联盟链;实用拜占庭容错算法;共识机制;信誉值;公平性



DOI:10.19850/j.cnki.2096-4706.2022.10.003


中图分类号:TP311.5                                   文献标识码:A                                     文章编号:2096-4706(2022)10-0016-05


Research on Improved Algorithm of Practical Byzantine Fault Tolerance Based on Reputation Value

WANG Qihe

(School of Control and Computer Engineering, North China Electric Power University, Baoding 071003, China)

Abstract: The consensus problem is the core problem in the blockchain. In view of the problems of arbitrary master node selection, large amount of network communication and low fairness of the Practical Byzantine Fault Tolerance (PBFT), which is commonly used in coalition chains, an improved algorithm of PBFT based on reputation value is proposed. Firstly, it changes the selection mode of reputation value master node. Then the consensus process is optimized, and the accumulated reputation of nodes is used as a condition to judge reaching consensus. The reputation value of nodes that do not participate in the consensus process or malicious nodes is reduced when consensus is reached, and the reduced reputation value is equally distributed to the nodes that successfully participate in consensus. After multiple consensus, the impact of the fault or malicious node on the consensus becomes small and the fairness of the algorithm is improved.

Keywords: coalition chain; practical Byzantine fault tolerant algorithm; consensus mechanism; reputation value; fairness


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作者简介:王启河(2000—),男,汉族,贵州遵义人,本科在读,研究方向:信息安全。