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Seminar:  Dynamic Jamming Avoidance

Date:September 17, 2012 
Talk Title:Dynamic Jamming Avoidance
Speaker:Yih-Chun Hu, Associate Professor, University of Illinois
Time & Location:12:00pm - 1:00pm
CIC Building, Pittsburgh

Abstract

Wireless networks are subject to jamming, an effective method for Denial-of-Service, because attackers and normal users have similar capabilities when accessing the wireless medium. In this talk, I will discuss two jamming related problems. First, I will describe a novel improvement on jamming-resilient broadcast in the absence of shared secrets. Continuing on work in uncoordinated spread spectrum, we show that spatial spreading through the use of directional antennas has significant advantages over more traditional approaches that use frequency- and code-division, by forcing the adversary to jam in a narrowband manner. I then will describe an approach to wireless spectrum reservations that exhibits good performance even when the adversary uses reservation information to jam more effectively. Specifically, I consider the problem that medium reservations allow legitimate users to avoid interfereing with each other, but also provide jammers with valuable information about where to transmit. I present the Simple Transmitter Strategy and Simple Signaling Scheme, which provide simple but highly effective approaches that allow a legitimate transmitter to share information only with other legitimate nodes.

Speaker Bio

Yih-Chun HuYih-Chun Hu is an associate professor of Electrical and Computer Engineering at the University of Illinois at Urbana-Champaign. He recieved his B.S. in Computer Science and Mathematics from the University of Washington, his Ph.D. in Computer Science from Carnegie Mellon University under David B. Johnson, and did a postdoc at the University of California, Berkeley under J. Doug Tygar. Yih-Chun's research interests are in wireless networks and network security.