面向学位/学历证书可信管理的可扩展类PBFT算法  

Scalable PBFT-like algorithm for trust management of degree/graduation certificates

作　　者：张学旺[1,2] 雷志滔 林金朝 ZHANG Xuewang;LEI Zhitao;LIN Jinzhao(School of Software Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;College of Microelectronic and Communication Engineering,Chongqing University,Chongqing 400004,China;Chongqing Key Laboratory of Photo Electronic Information Sensing and Transmitting Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学软件工程学院,重庆400065 [2]重庆大学微电子与通信工程学院,重庆400004 [3]重庆邮电大学光电信息感测与传输技术重庆市重点实验室,重庆400065

出　　处：《通信学报》2024年第9期40-54,共15页Journal on Communications

基　　金：国家自然科学基金资助项目(No.U21A20447)。

摘　　要：现有的学位/学历证书可信管理存在节点扩展的优化策略不足、未考虑节点差异性和吞吐量低等问题,“区块链+教育”为学位/学历证书的可信管理提供了一种解决方案。针对上述问题,提出一种面向学位/学历证书可信管理的可扩展类PBFT算法z-PBFT。该算法采用基于区域分组的分层设计,算法模型分为主区域和副区域节点簇,副区域内部采用局部共识机制;通过基于TOPSIS建模和熵值赋权法的加权随机选取分派策略评估节点性能,并选取共识委员节点集。实验结果表明,在大规模节点应用场景下,该算法在确保安全性的同时,具有更高的吞吐量和可扩展性。“Blockchain+education”offers a solution for trust management of degree/graduation certificates.Existing methods for managing degree/graduation certificates suffer from issues such as lacked optimization strategies for node expansion,neglect of node heterogeneity,and low through put.A scalable PBFT-like algorithm for trust management of de-gree/graduation certificates was proposed to address the above issues,called z-PBFT.The algorithm was based on a hierarchical design using regional grouping,with a model consisting of main region and sub-region node clusters.Local consensus was employed within the sub-regions.A weighted random allocation strategy based on TOPSIS modeling and entropy weighting was used to evaluate node performance and select a consensus committee node set.Analysis and simulation experiments demonstrate that the proposed algorithm ensures security while achieving higher throughput and scalability in large-scale applications of degree/graduation certificate trust management.

关 键 词：z-PBFT共识算法 学位/学历证书 可扩展性 区块链 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]