Research And Implementation Of The Internet Of Things Gateway Based On Blockchain

As the core technical support of the third wave of the information industry and the key cornerstone of the fourth industrial revolution,the Internet of Things has been widely used in various fields,and the number of Internet of Things equipment has spurt out.But so far,security issues are still the main obstacle to the large-scale adoption and deployment of the Internet of Things,because Io T devices are extremely vulnerable to a variety of reasons,such as most devices are wireless communication,which makes the system more vulnerable to identity spoofing,message eavesdropping,message tampering,etc.And Io T devices have limited resources in terms of energy,memory,and processing power.The emergence of blockchain technology with the characteristics of decentralization,data tamper resistance and traceability provides a new solution to the security problems of the Internet of Things.In view of the security issues of Io T terminal access and data transmission with limited resources,this thesis proposes a blockchain-based Io T gateway solution,and specifically makes the following aspects of research:(1)Study the security of the gateway that plays a key role in Io T architecture,and propose a way to connect the gateway to the Ethereum full node to indirectly access the blockchain to ensure the trust of the gateway through the gateway synchronization trust mechanism.(2)In view of the shortcomings of the traditional Io T device authentication and data transmission schemes,a gateway is proposed to proxy local devices,request a public key encryption operation from a trusted third-party key management center,and migrate complex encryption operations to the trusted third-party key management center and gateway to reduce the computing pressure on terminal devices.It also ensure the secure transmission of device data from the gateway to the cloud;(3)Study the principles and characteristics of blockchain technology,use the characteristics of blockchain data such as tamper-proof and decentralization,and propose a scheme to use the blockchain storage public key and public parameters of the devices to improve the security and transparency of key management and also realize cross-domain authorization of mobile devices;(4)In response to the urgent need for the secure sharing of private data in the Internet of Things environment,an alias mechanism is proposed,and a third-party trusted key service is used to achieve the secure sharing of data.