Supply Chain Information Sharing And Product Traceability System With Blockchain Technology

As far as the product supply chain is concerned,the update of the inventory status of the downstream nodes and the change of the order requirements directly affect the decision of the upstream nodes’ production plan.At this time,the information sharing between the upstream and downstream nodes is very important.In addition,the source and quality of products have begun to attract people’s attention.From the perspective of consumers,it is undoubtedly necessary to establish a reliable product traceability system.However,the process of information sharing may bring the risk of sensitive data leakage to enterprises.Moreover,most of the existing traceability systems often lack transparency,and the data is mostly kept by enterprises internally.When product accidents occur,nodes can easily escape responsibility and it is difficult to trace the source of the trouble.Therefore,how to construct a scheme with the functions of data sharing and enterprise privacy protection and realize a decentralized product source tracing system is still a significant challenge.Aiming at the above problems,this paper designed a supply chain information sharing scheme based on blockchain technology to realize enterprise privacy protection and user access control,as well as a decentralized product traceability system.The main achievements are as follows.1.For the problem of how to ensure that the sensitive data of enterprises are not leaked in the process of information sharing in the supply chain,this paper proposes an information sharing scheme that uses emerging blockchain technology to realize the privacy protection of enterprises.This scheme combines the advantages of attribute-based encryption,certificateless signature and distributed storage system.It realizes the privacy protection while sharing data,and enterprises have complete control over their data.Finally,the experimental evaluation and security analysis of the scheme are carried out,and the results show that the scheme is feasible and has the advantages of user access control and no single point of failure.2.In view of the problems that the traceability process is easy to be interrupted and it is difficult to find the person responsible when an accident occurs in the traditional centralized system,a decentralized product traceability system based on smart contracts is established in this paper,and an unchangeable tracking chain is formed through the cooperation among the smart contracts.Then,the truffle framework is used to build a Dapp application based on the prototype of the system,and a web page is implemented.Finally,the system security analysis results show that the system has the obvious characteristics of data accessibility,data immutability,and resistance to man-in-the-middle attack.