Research On Industrial Access Control Based On Blockchain Technology

With the development of intelligent manufacturing,the industrial field has ushered in a new round of revolution with the "integration of information technology and manufacturing",advanced industrial robots,intelligent equipment and industrial software control systems are gradually replacing traditional manual manufacturing models.In order to improve the production efficiency of products,a large number of manufacturing companies have begun to carry out digital transformation,so that data has become an increasingly important asset for manufacturing companies.Today,with the rapid industrial upgrading,product manufacturing has gradually risen from traditional internal enterprise production to collaborative manufacturing in the industrial supply chain.In order to ensure the security of data during data sharing,the research on industrial data access control has become one of the key directions.At present,the traditional industrial supply chain data sharing access control mechanism still has the following main problems:(1)Centralized data storage.Traditional data sharing systems often store data in a central database.When the storage device goes down,it is easy to cause a single point of failure and data loss.(2)Centralized access authorization mechanism.Traditional centralized access control is prone to paralysis of the access control mechanism due to core node failures.At the same time,the excessively centralized execution of access authorization will lead to authority abuse and trust problems.Finally,the access control strategy is vulnerable to malicious tampering and data access confusion.(3)Data is vulnerable to malicious tampering.Due to the self-interest of enterprises,when production abnormalities need to be traced back to product production data,decentralized data storage is likely to cause enterprises to maliciously tamper with their own data for evading accountability,making it difficult to locate the source of the problem.Liability cannot be accurately determined.In response to the above problems,this article combines blockchain technology with industrial supply chain data interaction,explores the use of blockchain technology to solve the access control problem during industrial data sharing,and combines key sharing algorithms,symmetric encryption algorithms and other technologies to design and implement A blockchain-based industrial data sharing system enables reliable and controllable sharing of data among industrial supply chain enterprises.The main contributions of this thesis are as follows:Design a tamper-proof data sharing network based on blockchain.In order to solve the problems of data centralized storage in the traditional supply chain data sharing network,it is easy to cause single point of failure,data loss,and data tampering.This solution uses the blockchain decentralized networking method to build a distributed supply chain data storage and interaction network,and the nodes in the network are equal and transparent.In order to ensure that the shared network can meet the heterogeneous data in industrial scenarios and share the storage pressure of the blockchain,this article uses a tamper-proof method that combines blockchain and IPFS distributed technology.The data is stored in the IPFS distributed file system,and the hash address of the data file is obtained through a hash operation.Finally,the hash address is stored in the ledger of the blockchain to ensure that the shared data cannot be maliciously tampered with.Attribute access control technology based on Shamir key sharing.For the traditional access control mechanism,the authority abuse caused by the over-centralization of the authorization method and the access control mechanism are prone to single points of failure.On the basis of blockchain-based data sharing network,Shamir key sharing algorithm and attribute access strategy are used to construct a decentralized access authorization mechanism based on blockchain technology.The data is encrypted and stored in the IPFS file system,the hash address and access control strategy corresponding to the data are stored in the consortium chain ledger,and then the decryption key is decomposed into sub-keys through the key sharing algorithm and delivered to different holders to ensure Original data security.An autonomous attribute access authorization mechanism is designed through the smart contract of the alliance chain to realize fine-grained access control to the data in the network,so that the data can be shared in the network in a trusted and controllable manner.Design a decentralized data sharing system based on blockchain and key sharing algorithm.Using the blockchain-based tamper-proof network as the underlying network model,the access control mechanism proposed in this article is applied to the system.Based on the product data sharing of the industrial supply chain,a blockchain-based data sharing system is constructed to make the data interaction credible and controllable.At the same time,a product supply chain of an enterprise is taken as an example to test the performance of the system,whether it can solve single point of failure,data tampering and access control of data sharing between enterprises.