ECE Department Seminar: Indirect Reciprocity Security Game for Large-Scale Wireless Networks
August 29, 2012
Dr. Liang Xiao,
Associate Professor, Department of Communication Engineering, Xiamen University
Time: 3:00 PM -- 4:00 PM, Aug 29th (Wednesday), 2012
Location: Babbio Center, Room 319
Radio nodes can obtain illegal security gains by performing attacks, and they are motivated to do so if the illegal gains are larger than the resulting costs. Most existing direct reciprocity-based works assume constant interaction among players, which does not always hold in large-scale networks. In this work, we propose a security system that applies the indirect reciprocity principle to combat attacks in wireless networks. Because network access is highly desirable for most nodes, including potential attackers, our system punishes attackers by stopping their network services. With a properly designed social norm and reputation updating process, the aim is to incur a cost due to the loss of network access to exceed the illegal security gain. Thus rational nodes are motivated to abandon adversary behavior for their own interests. We derive the optimal strategy and the corresponding stationary reputation distribution, and evaluate the stability condition of the optimal strategy using the evolutionarily stable strategy concept. This security system is robust against collusion attacks and can significantly reduce the attacker population for a wide range of attacks when the stability condition is satisfied. Simulation results show that the proposed system significantly outperforms the existing direct reciprocity-based systems, especially in the large-scale networks with terminal mobility. This technique can be extended to many wireless networks, including cognitive radio networks, to improve their security performance.
Liang Xiao received the B.S. degree in communication engineering from Nanjing University of Posts and Telecommunications, China, in 2000, the M.S. degree in electrical engineering from Tsinghua University, China, in 2003, and the Ph.D. degree in electrical engineering from Rutgers University, NJ, in 2009. She is currently an Associate Professor in the Department of Communication Engineering, Xiamen University, Fujian, China. She was a visiting professor with the University of Maryland, College Park in 2011. From 2003 to 2004, she was with North Carolina State University, NC. Her research interests include wireless security, smart grids, and wireless communications.