Design And Research Of Cold Chain Logistics System Based On Blockchain Technology

With the continuous development of digital cryptocurrencies such as Bitcoin,the underlying blockchain technology is receiving widespread attention.Blockchain technology is simply a distributed database that can implement credible data management in untrusted environments.It has the characteristics of decentralization,anti-tampering,and multi-party maintenance.At present,it has received great attention from government departments,financial institutions,universities and research institutes,technology companies and capital markets,and they have increased their investment efforts to achieve the early application of blockchain technology.At the same time,with the rapid popularization of e-commerce and the improvement of people's living standards,the cold chain logistics industry has developed rapidly and the level of informatization has increased significantly.However,due to the use of centralized databases,there is also a lack of trust and data storage.And opaque issues in the transmission process,so blockchain technology has become the best choice to solve these problems.Based on in-depth research on the current development of blockchain technology and the lack of trust in the cold chain logistics industry,this paper selects Hyperledger Fabric as the underlying blockchain platform and proposes a cold chain logistics system based on blockchain technology,To achieve secure and reliable data sharing between logistics participants.The main research work of the paper is summarized as follows:1)An in-depth analysis of the technical architecture and network model of Hyperledger Fabric,the establishment of a fabric-based blockchain network between logistics companies,shippers,and receivers,and the introduction of a multi-channel mechanism in the network model to achieve business data Isolation to ensure that data is shared only between relevant participants in each logistics transportation process.2)The system uses the certificate management module to implement the identity authentication and management of various nodes,IoT devices,and users.Only authenticated nodes can join the blockchain network to participate in the execution of transactions and the synchronous storage of data;use physical information of IoT devices to generate digital certificates that correspond to specific devices for identity authentication and permission control;according to different users Role,generate the corresponding digital certificate,so as to participate in the business system,to achieve data writing and query.3)The system divides the data into order data and environmental data,and designs different storage structures and winding methods according to its own data characteristics.4)Complete the design and implementation of the system smart contract.First,use the identity certificate information in the smart contract to implement the contract method-level permission control mechanism,and then implement the business contract and the ledger contract respectively.The system test results show that the design scheme of this paper can meet the basic needs of the logistics business,have better performance,improve the credibility and data security of the cold chain logistics industry,and provide a solution for the problems facing the cold chain logistics industry Better solutions have an important impact on the cold chain logistics industry.