Research On The Security Scheme Of M2M System Based On Cognitive Wireless Sensor Network

The M2M system combines the terminals of the wired or wireless networks together to realize the intelligent interaction between the machines and provide people some kinds of network applications and service. At the same time, the fast development of the wireless sensors stimulates the growth of WSN (Wireless Sensor Network) which provides people with a new way in getting and dealing with information. It connects the digital information with the objective and existent thing, and changes the interactive way between people and nature. The concept of combing WSN technology and M2M will show people a new ubiquitous network.However, there are still some challenges before realizing the ubiquitous network. Firstly, the flood of WSN products makes the unlicensed spectrum environment more and more strained. Secondly, new strategies are badly needed to ensure the security of the M2M system. The WSN-M2M research subject belongs to the project of the Natural Science Foundation of China and is part of the National Science and Technology major projects, so it will have important theories value and practice meaning.This paper mainly studies the security problems of the WSN-M2M ubiquitous network. To deal with the spectrum congestion of WSN, CR (Cognitive Radio) technology which enables network nodes to sense the spectrum environment is introduced to construct the CR-WSN. Then a smart home network is constructed as a typical application model for CR-WSN. And a cooperative spectrum sensing scheme is proposed to solve its security problems deriving from the CR function. The scheme is designed with high detection rate in spectrum sensing and the ability to resist malicious attacks. Latter simulation results show that the proposed scheme has a satisfactory performance in spectrum detecting accuracy and security.Next, to expand our research to system level, we construct a M2M smart home network based on the CR-WSN. In the system, the existing TD-SCDMA mobile network is used to construct a part of the M2M system and the whole system is designed to allow a mobile user to access his home network resources when he is outside. We mainly focus on the system security including the legal access of the terminal equipments, the establishment of the session key between the communication entities, the join of new equipment in the home network and so on. An authentication scheme is proposed to ensure the reliability of the communication entities. Then its safety and action ability are proved through simulation analysis. And the following analyses prove that the security scheme can resist many malicious attacks and provide safety insurance for the whole M2M system.