Research On The Key Technologies Of Blockchain-based Data Sharing For Industrial Internet

With the development of China’s industrial modernization,the traditional industrial development mode has gradually been unable to meet the needs of economic development.At present,China is in the transition period of industrial development,and inter-industry cooperation has become an important means to achieve leapfrog development,so the industrial Internet has become an important research direction.In the current industrial internet environment,the cooperation between industrial entities needs to be supported by data sharing,and the sharing and circulation of data needs to be safe and reliable,and on the other hand,it needs to build an open and fair platform and mechanism.In order to achieve the above goals,blockchain,as an open,non-repudiation and tamper-resistant distributed ledger technology,can become a part of different fields under the industrial internet environment An important carrier for data sharing among industrial entities in different industries.However,the introduction of blockchain technology will also bring new problems,such as the low performance of blockchain is difficult to meet the efficiency requirements of industrial production environment;The open nature of blockchain also contradicts the needs of identity privacy and data privacy in the industrial environment.Therefore,in order to solve the above problems,the research content of this thesis mainly focuses on improving the efficiency of consensus storage based on blockchain and realizing privacy protection for identity and data transmission.The specific research content is as follows:(1)In terms of adopting blockchain to ensure the reliability of shared data,considering the low consensus efficiency and high energy consumption of the current blockchain system as well as the special characteristics of the network structure in industrial production scenarios,this thesis proposes a new distributed ledger model of hierarchical hybrid directed acyclic graph to realize the recording of production data.The model first divides the industrial production scenario into multiple trust domains and classifies transactions into intra-domain and cross-domain transactions to achieve efficient recording of production data by introducing different consensus mechanisms.The mechanism has obvious advantages in terms of availability,attack resistance,and consensus efficiency against traditional high-performance blockchain systems and related directed acyclic graph systems.The proposed mechanism above provides an important support to ensure the reliability of the original data,thus providing assurance for the availability of shared data.(2)In terms of identity privacy protection for blockchain-based data sharing mechanisms,the transparency characteristics of blockchain make the process of interaction between data sharing parties with blockchain or related smart contracts open to all blockchain participants,thus there is a risk of leakage of sensitive information such as industrial capacity,orders,and inventory due to the lack of identity privacy protection.Therefore,based on blockchain and smart contracts,this thesis constructs a privacy protection model that operates independently of a generic blockchain system,combines pass exchange,coin mixing technology,ring signature and other related technologies to protect the identity privacy of data sharing participants,and can limit the circulation of shared data under the condition of anonymization,which meets the needs of data owners while protecting the identity privacy of data requesters.It effectively avoids the problem of identity privacy leakage arising from participation in the blockchain-based sharing mechanism.(3)With regard to the construction of blockchain-based data sharing model,based on highly reliable data,this thesis conducts research on the typical data sharing scenario of traceability system in industrial environment.The article builds a traceability system based on blockchain and zero-knowledge proof by combining blockchain as the basis and zero-knowledge proof mechanism,which can divide the traceability purpose into multiple verifiable proofs by analyzing the traceability purpose.It can complete the traceability process by analyzing the traceability purpose,dividing the traceability purpose into multiple verifiable proofs and finally completing the traceability process by proof verification,thus avoiding the transmission and exposure of the original data in the traceability process,while the proof process is deployed on the blockchain in the form of smart contracts,which enables the traceability process to have higher credibility while ensuring openness and transparency,and finally realizes a method to complete data traceability without exposing any original data.The proposed method can not only promote the sharing of relevant data among industrial entities,but also provide effective support for building trust relationships among industrial entities.