Research On Authentication Schemes Of Industrial Internet Of Things Based On DAG Blockchain

The Industrial Internet of Things provides product traceability for industrial systems by using sensor and network technology.Participants can effectively track products and record their status in the production process.The product data sharing service of the current Industrial Internet of Things system has a center.When participants obtain untrusted product data,they cannot trace the source.DAG blockchain can solve this problem.DAG blockchain technology not only has the characteristics of chain blockchain decentralization and tamper proof,but also can tolerate bifurcation and have higher efficiency.But it still can not solve the problem of data privacy and security when storing product data on DAG blockchain.Based on the above problems,this paper first defines the security requirements of private data in the industrial internet of things,focuses on the distributed tamper proof,efficient authentication and privacy protection of users’ private data in the industrial internet of things based on blockchain,and puts forward a security protection scheme for the above problems.The main research contents of this paper include the following two aspects:1.This thesis proposes a sequential aggregation signature scheme for industrial internet of things based on DAG blockchain.The DAG blockchain in the scheme can cope with the characteristics of high concurrency and easy bifurcation of the traditional blockchain in the industrial internet of things.It solves the centralization problem by combining the distributed key generation technology,and the use of aggregate signature reduces the number of verification and the size of signature.At the same time,due to the inability to distinguish the type of transaction signature,it improves the privacy of data on the chain.This scheme not only protects users’ privacy,but also improves the efficiency of message authentication.Finally,the correctness,security and performance of the scheme are analyzed.2.This thesis proposes a signature traceable scheme of industrial blockchain based on DAG.This scheme mainly studies the application of ring signature in industrial internet of things based on DAG blockchain.Traceable ring signature is a special ring signature.In this scheme,it not only limits the abuse of anonymity,but also provides strict traceability,which can be traced to the intelligent factory that needs to be accountable.Simple internal and external coordination of the industrial internet of things may lead to privacy disclosure.While ensuring the security of data privacy,this scheme can also effectively deal with the special scenarios of dynamic joining and exiting in the industrial internet of things.Finally,the correctness,security and performance of the scheme are analyzed,and it is proved that the scheme has anonymity and traceability.