Research And Application Of Identity Authentication For IoT Devices And Hybrid Encryption And Decryption Technology

With the rapid development of information technology and the Internet,the application of the Internet of Things in various fields has become more and more extensive.While making life easier,the security risks faced by the Io T environment have also received more attention.At present,the security requirements for Io T node identity authentication,data transmission,access and storage are gradually increasing.How to solve the Io T information security problem has become an important research topic.This paper mainly studies the authentication of Io T devices and information security issues during data transmission.This paper proposes an elliptic curve digital signature algorithm for the Io T environment and a digital envelope hybrid encryption and decryption algorithm based on the state secret algorithm,finally designs and implements the Io T device management system.The main research contents and achievements are as follows:1.In view of the problems of poor computing power and limited storage capacity of Io T devices,this paper proposes an elliptic curve digital signature algorithm for the Io T environment.By changing the general equation of the elliptic curve,the inversion and point multiplication operations in the algorithm are reduced,and new elements are introduced to ensure the security of the algorithm.The algorithm has strong security and high computing efficiency,and the simulation verification of the algorithm proves the effectiveness and feasibility of the algorithm.2.In order to ensure the secure transmission of data,this paper uses a hybrid encryption algorithm combining the national secret SM2 algorithm and the national secret SM4 algorithm to encrypt the data,using the symmetric encryption algorithm SM4 as the data encryption algorithm,and the public key key algorithm SM2 as the symmetric key encryption algorithm.,in the form of a digital envelope,combining the advantages of the two algorithms to improve the security of the data transmission process.3.Designed and implemented an Io T device management system to achieve unified management of different devices,as well as functional modules such as user management,device management,key management,notification management,etc.Through the design,implementation,development and testing processes,the results show that the device management system Can operate normally and meet the needs of users to achieve the expected purpose.Research contributions: Proposed elliptic curve digital signature algorithm for Io T environment;digital envelope hybrid encryption and decryption algorithm based on state secret algorithm;design and develop Io T device management system.