Research On Cross Domain Authentication Of Internet Of Things

The Internet of Things devices,which are responsible for collecting data and executing commands,and the Internet of Things application systems,which are responsible calculating and processing data,are two important components of the Internet of things.However,various devices and heterogeneous application systems make the Internet of Things in a complex multi-domain environment.Cross domain authentication can break the trust barrier between different trust domains and enables entities to interact and communicate with other systems without repeated registration.However,cross domain entities beyond the security control boundary of the original system will cause security threats to the cross domain access system.If there is no secure cross domain authentication mechanism,it may threaten the security of the whole system.At the same time,there is uncertainty in the authentication results of different trust domains.If there is no reasonable trust measurement mechanism,a single cross domain authentication mechanism is difficult to ensure the security of authentication.Therefore,the cross domain identity authentication of the Internet of Things is an important research issue of the security of the Internet of things.This thesis aims at the security problems of cross domain authentication and trust measurement in the Internet of things,researches on the problem of cross domain authentication on the Internet of Things,solves the identity management problems between heterogeneous systems by using identity federation,realizes cross domain identity authentication of entities by using digital certificates,and improves the security of the system by calculating the trust value of cross domain entities.The main research contents include the following two points:1.A cross domain authentication scheme of the identity federation of Internet of Things based on certificate.In this scheme,the identity management system of the trust domain in the environment of the Internet of Things is formed into an identity federation.The trusted third party key center in the federation generates certificates for cross domain authentication for entities,which realizes the cross domain identity authentication and data security in the federation.Finally,this thesis analyzes the security and performance of the scheme,and verifies the scheme through simulation experiments.2.A cross domain authentication scheme of Internet of Things based on the trust value of device.This scheme first divides the security level of the identity management system by analyzing the identity authentication methods of different identity management systems in the federation,then extracts the cross domain access records of entities in the federation,combines with the evaluation of other systems to entities,and comprehensively calculates the trust value of devices,so as to reduce the security impact of different identity management systems and authentication mechanisms on the cross domain authentication results.