On Designs of Decentralized Reputation Management for Permissioned Blockchain Networks  

作　　者：Jinyu Chen Long Shi Qisheng Huang Taotao Wang Daojing He 

机构地区：[1]School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing,210094,China [2]School of Mechanical Engineering and Automation,Harbin Institute of Technology,Shenzhen,518055,China [3]College of Electronics and Information Engineering,Shenzhen University,Shenzhen,518060,China [4]School of Computer Science and Technology,Harbin Institute of Technology,Shenzhen,518055,China

出　　处：《Computer Modeling in Engineering & Sciences》2024年第5期1755-1773,共19页工程与科学中的计算机建模（英文）

基　　金：supported by the Shenzhen Science and Technology Program under Grants KCXST20221021111404010,JSGG20220831103400002,JSGGKQTD20221101115655027,JCYJ 20210324094609027;the National KeyR&DProgram of China under Grant 2021YFB2700900;the National Natural Science Foundation of China under Grants 62371239,62376074,72301083;the Jiangsu Specially-Appointed Professor Program 2021.

摘　　要：In permissioned blockchain networks,the Proof of Authority(PoA)consensus,which uses the election of authorized nodes to validate transactions and blocks,has beenwidely advocated thanks to its high transaction throughput and fault tolerance.However,PoA suffers from the drawback of centralization dominated by a limited number of authorized nodes and the lack of anonymity due to the round-robin block proposal mechanism.As a result,traditional PoA is vulnerable to a single point of failure that compromises the security of the blockchain network.To address these issues,we propose a novel decentralized reputation management mechanism for permissioned blockchain networks to enhance security,promote liveness,and mitigate centralization while retaining the same throughput as traditional PoA.This paper aims to design an off-chain reputation evaluation and an on-chain reputation-aided consensus.First,we evaluate the nodes’reputation in the context of the blockchain networks and make the reputation globally verifiable through smart contracts.Second,building upon traditional PoA,we propose a reputation-aided PoA(rPoA)consensus to enhance securitywithout sacrificing throughput.In particular,rPoA can incentivize nodes to autonomously form committees based on reputation authority,which prevents block generation from being tracked through the randomness of reputation variation.Moreover,we develop a reputation-aided fork-choice rule for rPoA to promote the network’s liveness.Finally,experimental results show that the proposed rPoA achieves higher security performance while retaining transaction throughput compared to traditional PoA.

关 键 词：Blockchain reputation management POA THROUGHPUT SECURITY DECENTRALIZATION 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]