基于区块链的食品供应链数据双链存储优化模型  

Optimized model of dual-chain storage of food supply chain data based on blockchain

作　　者：高圣乔 刘新亮[1,2,3] 高彦平 GAO Sheng-qiao;LIU Xin-liang;GAO Yan-ping(School of E-commerce and Logistics,Beijing Technology and Business University,Beijing 100048,China;Agricultural Engineering Quality Safety Traceability Technology and Application National Engineering Laboratory,Beijing 100048,China;School of Information and Electrical Engineering,China Agricultural University,Beijing 100083,China)

机构地区：[1]北京工商大学电商与物流学院,北京100048 [2]农产品质量安全追溯技术及应用国家工程实验室,北京100048 [3]中国农业大学信息与电气工程学院,北京100083

出　　处：《食品与机械》2020年第11期63-70,共8页Food and Machinery

基　　金：科技部重点研发课题(编号:2016YFD0401205);北京市科委计划项目(编号:Z191100008619007);北京市教委面上项目(编号:KM201510011008)

摘　　要：区块链的出现,为食品供应链管理提供了一种去中心化整合资源、消除信息不对称的解决方案,但目前区块链解决方案中大多面临性能和存储瓶颈。针对此问题,文章提出了一种基于区块链的食品供应链数据双链存储优化模型。模型构建了主链、摘要链双链结构,用户可以根据需求选择适当的存储模式,缓解了区块数据存储膨胀问题;模型采用改进的委托权益证明与拜占庭容错共识机制,加入信誉积分机制选举记账节点,防止女巫攻击的同时,减少了交易确认和区块验证时间。通过仿真试验,验证了该方案能很好适配食品供应链,大幅优化存储资源,提高共识出块速度,提升区块链系统性能和吞吐量。The emergence of blockchain provides a solution of decentralized integration of resources and elimination of information asymmetry for food supply chain,but most of the current solutions are facing performance and storage bottlenecks.In response to this problem,this paper proposes a dual-chain storage optimized model for food supply chain data based on blockchain.The model builds a double-chain structure of the main chain and the digest chain.Nodes can choose the appropriate storage mode according to their needs,which alleviates the problem of block storage expansion.By adopting the improved Delegated Proof of Stake and Byzantine fault tolerance consensus mechanism with the credit system to elect accounting nodes,to prevent witch attacks at the same time to reduce transaction confirmation and verification time of blocks.Finally,through simulation experiments,it is verified that the solution can adapt well to the food supply chain,greatly optimize the storage resources,increase the speed of block generation,and improve the performance and throughput of the blockchain system.

关 键 词：食品安全 区块链 供应链 共识机制 存储膨胀 

分 类 号：F274[经济管理—企业管理] TP311.13[经济管理—国民经济]