基于多节点评估模型的改进PBFT多层共识算法

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中图分类号：TP311.13 文献标志码：A文章编号：1003-3114（2025）06-1262-10

Abstract：A Multi-layer Practical ByzantineFaultTolerantce （M-PBFT）algorithmbasedonnode evaluation model isproposed to addressheproblemsoflownegotitioneficiencyandmaliciousbehavioroftemainnodeleadingtonegotiationfailurewenthePBFT algorithmhasalargenumberofodes.FistlythalgorithmconstructsacomprehensiveevaluationmodelthatcombinesAnalyticHier archyProces（AHP），TechniqueforOrderPreferencebySimilaritytoanIdealSolution（TOPSIS）method，andBordacounting.The modeltakesnodebehaviorasteevaluationindicatorandobtainstecompreensivescoreofodesbasedontheirpreferencesScondly thealgorithmdividestheconsensusprocessintoaulti-layerstructurebasedontetotalnumberofodesanddynamicgroupingstate gy，withthemainnodeservigasamembernodeinthehigher-levelgoup.Itsetsupodemodeloptimizationstrategiesandaoaly detectionmechasms，djuststeodelfoierentseariosndpromptladesomaliesides.inallfterchaf PBFTconsensus，fedbackisgivento theevaluationmodelbasedontheperformanceofthenodesthathavereachedonsensus，andfurthernodeevaluationsareconducted.Theconsensusprogresseslayerbylayer，ultimatelycompletingtheglobalconsensus.Expriental resultsshowthattheM-PBFTalgoihmimprovesthesalabilityndfaulttoleranceofodesandsignficantlyreducescommuication complexityandviewswitchingprobabilityinthecaseoflargenodenumbers.Itwasalsovrifiedtatthealgorithstillachvedconsensus success rate of 98.2% evenwhen the total number of Byzantine nodes reached 20% .Therefore，itcanbeeffectivelyand efficiently applied to consortium blockchain systems.

Keywords：blockchain；consensus algorithm； PBFT；evaluation model; multi-layer consensus

0引言

自Nakomoto[1]2008年提出“一种完全通过对等技术实现的电子现金货币”以来，比特币、以太坊和联盟链等区块链技术得到了很多学者的重视。（剩余15566字）