Research And Implementation Of Terminal Authentication And Automatic Access Technology In IoT

At present,the terminal device authentication mechanism of the Internet of Things is not yet mature.The centralized terminal device authentication mechanism has problems such as complicated system structure,high difficulty in management and maintenance and low authentication efficiency.The public key certificate authentication mechanism has defects such as difficulty in certificate management,high cost of issuing and maintaining certificates and high requirements for resources of terminal devices.In order to solve these problems,this paper conducts in-depth research on problems such as the security authentication mechanism of IoT devices and the automatic access technology of IoT devices.The main research contents of this paper are as follows:(1)At present,the IoT terminal identity authentication adopts a centralized authentication management mechanism,which has problems such as high system responsibility,difficulty of management and maintenance,weak scalability and low security.Aiming to solve theese problems,this paper designs a distributed authentication mechanism based on edge gateways.After authenticating and authorizing,the functions of identity authentication and device management are delegated to the legal edge gateway.The edge gateway directly authenticates and manages the terminal devices.After comparative analysis,the authentication mechanism designed in this paper is more flexible to deploy and has strong system expansion capability.The authentication service will not be paralyzed due to the failure of one authentication service node.(2)Aiming at the complexity problem of authentication protocol,a lightweight ID-based authentication algorithm and key agreement algorithm are designed.The amount of calculation in the process improves the efficiency of certification.Finally,comparing with other schemes,the scheme designed in this paper can reduce the time consumed by the operation in the authentication process and improve the authentication efficiency.(3)Based on the research above,the Internet of Things system model for terminal access and authentication is proved.Device registration,device authentication,device management and other functions are released as resource API interfaces.The terminal can automatically authenticate and automatically access uploaded data by calling the corresponding resource API interface.In order to verify the correctness of the system,this paper takes the temperature and humidity sensor as an example.The results show that the authentication protocol and key agreement protocol designed in this paper can accurately verify the identity of the terminal device,and the system can realize automate functions such as terminal device access,registration,authentication and data uploading.