Date of Award
Doctor of Philosophy
Johnny S. Wong
Wireless mesh networking has emerged as a key technology to provide
wide-coverage broadband networking. It benefits both service
providers with low cost in network deployment, and end users with
ubiquitous access to the Internet from anywhere at anytime. Wireless
mesh networks are vulnerable to malicious attacks due to the nature
of wireless communication and the lack of centralized network
infrastructure. Meanwhile, the capacity of multi-radio multi-channel
communication, the need for heterogeneous network integration, and
the demand for multi-hop wireless communication often make
traditional security mechanisms inefficient or infeasible.
Therefore, wireless mesh networks pose new challenges and call for
more effective and applicable solutions.
In this work, we identify the requirement for a systematic security
framework to protect wireless mesh networks and provide a security
system with heterogeneity-aware intrusion prevention mechanism,
cross-layer based intrusion detection technique, and a generic
intrusion response model.
Our major contributions lie in the following: (1) We identify the
architecture heterogeneity of wireless mesh networks and proposed a
novel heterogeneity-aware group key management framework which
combines the logical key hierarchical technique together with the
localized threshold-based technique. (2) To leverage link-aware
routing characteristics, we present a cross-layer based anomaly
detection model which utilizes machine learning algorithms for
profile training and intrusion detection. (3) We address the
automatic intrusion response problem in wireless mesh network by
providing a generic response model to describe the dependency of
system services and resources. The dependency graph is later used
for damage cost assessment and response cost evaluation. (4) We
build a wireless mesh network testbed and implemented a system
prototype for intrusion detection system. Our simulation and
experiment results show that our solutions outperform existing ones
and are practical for wireless mesh networks in terms of
communication overhead and performance speed.
Wang, Xia, "A Systematic Security Approach in Wireless Mesh Networks" (2009). Graduate Theses and Dissertations. 10729.