Research On Information Security Protection Of Internet Of Things Based On Blockchain

With the development of the Internet of Things ecosystem,a large amount of Internet of Things data is generated.How to ensure the security of these data is a problem that needs to be solved in the development of the Internet of Things.Traditional Internet of things security protection relies on centralized infrastructure.With the increase of data scale,these facilities are facing great challenges in computing,storage,information security and stability,and traditional security and privacy protection methods are often not suitable for large topology.The blockchain is based on a distributed network and has the characteristics that data cannot be tampered with and decentralized.The blockchain provides new ideas for the security protection of the Internet of Things.The introduction of blockchain technology in the Internet of Things can avoid dependence on centralized servers and it can effectively protect the security of data information in the Internet of Things.However,the current data processing efficiency of the blockchain is relatively low,so it is necessary to solve the bottleneck of data processing capability while applying the blockchain technology.In summary,this article mainly studies the consensus mechanism in blockchain technology and uses blockchain technology to solve the problem of information security of the Internet of Things.The main research contents are as follows:1.In order to solve the problem of Io T information security,this thesis proposes a blockchain-based Internet of Things information security protection scheme.The scheme uses blockchain technology as the underlying technical support,and uses IPFS as the storage database for the security model of the Internet of Things information,and at the same time combines the cryptographic algorithm to further protect the original data information.Finally,this thesis carried out an experimental simulation of the protection scheme.Through experiments,it was found that the scheme has good security and feasibility.2.In order to solve the problems of low block efficiency and long transaction confirmation time of the current mainstream blockchain consensus mechanism,this thesis proposes a CRaft algorithm based on improved clustering based on the Raft consensus algorithm.The CRaft algorithm divides all the nodes into different clusters through clustering algorithm in the system,and selects a Leader node in each sub-cluster and these Leader nodes form the main cluster.Leader election and log replication are limited in the CRaft consensus algorithm,so that CRaft can solve the Byzantine general problem.Experiments show that although CRaft increases the number of elections,compared with Po W,Raft and PBFT,CRaft shows better security and efficiency when the system runs for a long time.