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The Research on Key Technologies in Wireless Mesh Networks Security

Author: LiHongJian
Tutor: XuMing
School: National University of Defense Science and Technology
Course: Computer Science and Technology
Keywords: Wireless Mesh Networks Security Selfish behavior attack Intrusion Detection Fault Diagnosis Fast authentication
CLC: TN929.5
Type: PhD thesis
Year: 2011
Downloads: 209
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Abstract

Wireless Mesh Network is a new and completely different from a traditional wireless network wireless network technology. Based multi-hop routing, peer-to-peer network technology, wireless Mesh network has a large-capacity, high-speed, wide coverage and robust, stable, very open area suitable for large area wireless LAN solutions. The emergence of wireless Mesh network, represents another big leap in wireless network technology, has a very broad application prospects in recent years has been more and more attention in both academia and industry. Wireless Mesh Network security issues due to its inherent wireless multi-hop nature, is very prominent. These security problems for the universal application of the wireless Mesh network has an important impact, safety-critical study of wireless Mesh network technology has important theoretical and practical significance. Wireless Mesh Networks are separated from the Ad hoc network, and inherited part of wireless LAN technology. Security threats facing both similar to the two network technologies, but also there is a big difference between the need to re-design the security mechanism for Wireless Mesh Networks. As the ultimate goal to create a safe, reliable wireless Mesh network, in-depth analysis of the wireless Mesh network security architecture and research status. On this basis, the guarantee of the key technologies of wireless Mesh network security communication, new ideas and solutions. In order to ensure the availability of the wireless link and network design selfish behavior detection mechanisms for wireless Mesh network link congestion detection algorithm, hidden terminal / exposed terminal detection algorithm. In order to improve the security of the wireless Mesh network this article proposed mechanism of intrusion detection and authentication mechanisms. The major innovations of this paper are as follows: (1) the selfish behavior of the selfish behavior of the single-point detection for wireless Mesh network MAC layer and multi-node collaboration selfishness to establish a model of selfish behavior, proposed a mechanism for \algorithm. Analysis of the characteristics of multi-node collaboration selfish behavior attack in wireless Mesh network, and the detection algorithm. The above algorithm mitigation selfish behavior, especially in the wireless mesh network is a \(2) Wireless Mesh Network fault detection diagnosis of possible failure in the network in order to ensure the availability of wireless Mesh network. Wireless Mesh network link congestion problems caused due to the dynamic nature of the network, the radio channel open, network topology and MAC mechanism and hidden terminal / exposed the failure of the terminal as well as external noise, network availability and therefore will be affected. To this end, this paper analyzes and summarizes the wireless mesh network congestion, hidden terminal / exposed terminal as well as the noise generated by three types of failure proposed partial front should be distributed detection algorithm. The algorithm through statistical analysis and calculation of the network topology the node signal-to-noise ratio, as well as network flow carried, the current state of the network, to detect whether such failure. Depending on the network topology, the for hidden terminal / exposed terminal solution algorithm. The algorithm has been validated in the experimental platform is a lightweight detection algorithm. (3) cross-layer intrusion detection and other security measures to prevent the attacks of malicious nodes in wireless Mesh network intrusion detection techniques to detect malicious behavior. However, the problem of wireless intrusion detection technology is limited, there is a high rate of false positives in network characteristics. In this paper, the use of different network layer data as audit data to detect cross-layer intrusion detection framework. For different intrusion in the system using the physical layer, the MAC layer and the network layer of the data detection. And network failure detection input to the detection engine to reduce the lead to false positives due to network failure. (4) security certification technology wireless Mesh network environment using the IEEE 802.11i protocol insecure username / password mode and switching delay big problem. Wireless Mesh network to support wireless terminal within the network switch, but the certification process is too long in the wireless Mesh network limits real-time applications. This paper presents a fast authentication based on digital certificates optimization program and quickly switch based on the pre-certification / pre-configured security protocol. Which digital certificate based authentication based on digital certificates, to strengthen the security and reliability of the certification. Fast authentication optimization scheme by reducing the number of times of communication between the client and the authentication server, so that the user access point is switched, it is possible to complete the authentication with a smaller delay to complete the access procedure. Pre-certification / pre-configuration mechanism allows the client during the switch before the corresponding authentication and network configuration information in the handover process can significantly reduce the switching time. (5) Design and Implementation of the existing wireless Mesh network security field many studies are in software simulation test, the verification of the validity of certain limitations, often can not reflect the real network environment. To this end, this paper established a prototype system of wireless Mesh network. Router platform the YH-WMR V1.0 by our own design production with independent intellectual property rights can be used as a mobile client access point and mesh network routers, and with security enhancements. Secure Wireless Mesh Router Firewall, MAC address filtering, intrusion detection, fault diagnosis, authentication and authorization security technologies. Through the actual test showed that the proposed security key technology of wireless Mesh network can improve the safety and reliability of the wireless Mesh network, to further promote the development of the wireless Mesh network has important reference significance.

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