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[2019-06-25] Prof. Yih-Chun Hu, University of Illinois at Urbana-Champaign, "Jamming and Mitigation in Non-Traditional Environments"

非專題討論演講公告
Poster:Post date:2019-06-20
Title: Jamming and Mitigation in Non-Traditional Environments
Date: 2019-06-25 2:00pm-3:00pm
Location: R101, CSIE
Speaker: Prof. Yih-Chun Hu, University of Illinois at Urbana-Champaign
Hosted by: Prof. Hsu-Chun Hsiao
 
 

Abstract:

 
Jamming in traditional wireless environments is well understood. However, sometimes the RF environment is modified in some way that challenges existing models and approaches. In this talk, I will describe two such environments. First, I will describe our work on jamming in leaky waveguide systems, which are used to channel wireless signals along a certain path, such as down railway tunnels. Because of the losses inherent in coupling into and out of leaky waveguides, and in order to ensure that wireless signals propagate down the entire waveguide, leaky waveguide systems often include repeaters, which boost both regular user signals and jamming signals. Unlike traditional wireless systems where increased distance results in decreased jamming power, in amplified leaky waveguide systems, jamming power can actually increase with increasing distance. Next, I will describe our Cognitive Radio from Hell, a practical attack but very strong against spread spectrum systems. We adopted certain hardware techniques used in non-jamming literature to significantly decrease the attacker reaction time, resulting in a strong attack that flips secondary taps in Direct Sequence Spread Spectrum. I will also address approaches for mitigating attacks in these environments.
 
 
Biography:
 
Yih-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. 


 
Last modification time:2019-06-20 AM 10:08

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