Research On Access Authentication And Continuous Trust Evaluation Of Multiple Power Terminals

As an important component of a new type of power system,multiple power terminals play an important role in promoting the digital transformation and intelligent upgrading of power systems.Due to the large number of multiple power terminals connected to the new power system,there are also terminals that deliberately undermine the security of the power system attempting to connect,and even legitimate terminals that have been connected to damage the power system from within the system,which poses a significant challenge to the security of the system.Therefore,it is very important to authenticate and continuously evaluate the access of multiple power terminals in the new power system.In response to the above issues,the thesis focuses on the research of multiple power terminal access authentication schemes and continuous trust evaluation models.Firstly,a multiple power terminal access authentication scheme based on SM9 algorithm is proposed,and then a continuous trust evaluation model based on Transformer network is proposed to evaluate the continuous trust of legitimate terminals accessing the system.A multiple power terminal access authentication and continuous trust evaluation system is established.The specific research content of the thesis is as follows:1.Aiming at the problem of high computing cost of digital certificates,an access authentication scheme adapted to the characteristics of low power consumption and low computing power of multiple power terminals was designed.First,the SM9 encryption algorithm is used to encrypt the inherent and hidden attributes of the device,generating a unique identification fingerprint for the multiple power terminals.Then,a collaborative key generation scheme is used to generate a key for secure communication.Finally,access authentication is performed for the accessed multiple power terminals,and the security of the scheme is analyzed.2.Aiming at the attack threats from internal and external legitimate permission terminals,the business behavior of the terminals is analyzed,and a dynamic trust evaluation model based on Transformer network is constructed.Firstly,a Transformer network is designed to perform unsupervised pre training on the data using the designed network,extract the temporal characteristics of the data,effectively improving the generalization ability of the model.Then,a trust model of terminal historical behavior is constructed to predict the future behavior of a terminal,calculate the similarity between the predicted behavior and the actual behavior of the terminal,and evaluate the trust of terminal business behavior,The experimental results show that this method can reduce training time and improve the accuracy of trust evaluation.3.Based on the above research,a multi element power terminal access authentication and continuous trust evaluation system based on zero trust architecture is constructed.The system architecture is designed and the detailed functions of the core components of the system are described.The key technologies and systems studied in this thesis can effectively improve the security protection level of multiple power terminal access authentication and continuous trust evaluation authentication systems.