Computer Science

Computer Science ›› 2023, Vol. 50 ›› Issue (6A): 220400200-12.doi: 10.11896/jsjkx.220400200

• Information Security • Previous Articles     Next Articles

Overview of Blockchain Consensus Algorithms

TAN Pengliu, WANG Runshu, ZENG Wenhao, WANG Shikun, ZOU Wenshi   

  1. School of Software,Nanchang Hangkong University,Nanchang 330063,China
  • Online:2023-06-10 Published:2023-06-12
  • About author:TAN Pengliu,born in 1975,Ph.D,associate professor,is a member of China Computer Federation.His main research interests include blockchain,cyber-physical system,intelligent medical care,etc.
  • Supported by:
    National Natural Science Foundation of China(61961029)and Key Research Plan of Jiangxi Province Department of Science and Technology(20171ACE50025).

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Abstract: Consensus algorithm not only maintains the stability and security of distributed system,but also is the key technology in the development direction of blockchain.With the rapid development of blockchain technology,the research of consensus algorithm has attracted more and more attention and favor of researchers.Nowadays,choosing an appropriate consensus algorithm in different application scenarios is a selective problem that researchers have to face.Starting from the types of service object nodes,this paper classifies the consensus algorithm into three categories:public chain,alliance chain and private chain.Based on these three categories,this paper expounds the basic principles of some mainstream and some new blockchain consensus algorithms,a total of 9 consensus algorithms,and evaluates the performance of these 9 consensus algorithms from three aspects:decentralization,security and scalability.This paper also analyzes and summarizes the advantages and disadvantages of the relevant algorithms,and gives the relevant directions to optimize the blockchain consensus algorithm for researchers’ research and reference,so as to promote the steady development of blockchain consensus algorithm.

Key words: Blockchain, Consensus algorithm, Public chain, Alliance chain, Private chain, Advantages and disadvantages

CLC Number: 

  • TP301
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