A Credible Io T Architecture Based On Blockchain

With the maturity and popularization of physical network technology,the Internet of things has brought people intelligent working mode and life style,but the privacy and security of information data can not be ignored.The information data collected by Internet of things through various terminal devices involving user privacy has the risk of being leaked,lost and tampered in the process of production,transmission,processing and storage,which makes the privacy and security of user data not guaranteed.Since blockchain was asked,it has been famous for its excellent security.The cryptography technology,unique trust mechanism and the tamperable characteristics of block data provide a new solution to the data privacy security of the Internet of things.This thesis aims to study the trusted Internet of things architecture based on blockchain,and proposes a new scheme to protect the data privacy of Io T by using blockchain technology.The main work of this thesis is as follows:A trusted Internet of things architecture based on blockchain is proposed.Based on the theoretical analysis of the availability and feasibility of using blockchain technology to guarantee the security of data privacy of the Internet of things,the thesis considers the characteristics of the Internet of things,such as limited terminal equipment resources,large business volume,high real-time requirements,and massive data,as well as the advantages of high security,tamper free,easy audit and high transaction delay,low transaction throughput and chain storage short board,designed a network structure that can give full play to the advantages of blockchain and minimize the negative impact of the short board of blockchain,so that the blockchain can better serve the Internet of things and ensure the data privacy security of the Internet of things.The blockchain consensus algorithm is designed for the Internet of things environment.Considering the application of blockchain to the Internet of things scenario,combined with the general characteristics of the application scenario of the Internet of things,the consensus algorithm,the core of blockchain,is designed.The proposed consensus algorithm is improved based on the classical practical Byzantine fault tolerant algorithm(pbft),and a series of related mechanisms are proposed to ensure the normal operation and efficiency improvement of the consensus algorithm.The simulation results show that the consensus algorithm has higher consensus efficiency and transaction throughput,which makes the blockchain better serve the Internet of things.The business process is designed for the new architecture of Internet of things.Aiming at the characteristics of the proposed trusted Internet of things architecture based on blockchain,a complete process scheme for dealing with IOT business is designed.According to different types of Internet of things services,namely,conventional business,upper chain business and interactive business with chain,different business processing processes are formulated respectively.While considering the real-time efficiency of Internet of things business processing,the utilization efficiency of blockchain is guaranteed,and a feasible and reliable Internet of things architecture is finally realized.