学术报告

Wireless Networking with Secrecy Constraints

演讲人：童朗教授

Professor Lang Tong

School of Electrical and Computer Engineering

Cornell University, Ithaca, NY 14853

EMAIL:ltong@ece.cornell.edu

URL: people.ece.cornell.edu/ltong

演讲时间：12月8日周五上午10:00-11:00

演讲地点：FIT楼1区315

邀请人：自动化系 管晓宏教授

演讲内容简介：

Wireless networks are vulnerable to intrusion and attack. Even the strongest encryption and authentication are not sufficient to protect the network. Because signals propagate in shared media, the very acts of transmission, easily detectable using simple devices, reveal crucial aspects of networking. For example, by listening the widely used RTS-CTS exchanges, an eavesdropper can guess the transmitter-receiver pair without decoding the content of the transmission. If eavesdropping sensors are geographically distributed in the network, a malicious attacker can obtain medium access control (MAC) and routing information and track messages propagating in the network, which allows him to jam the network at a crucial time or launch a denial-of-service attack.

We present in this talk two related problems. The first is the detection of information flow wherewe address some of the following questions: Can a route be discovered by eavesdropping sensors?What are the fundamental limits of hiding the information flow in a multihop setup? What are the effective ways of detecting information flows when they are detectable? This problem is also related to the so-called stepping-stone detection.The second problem is on defending eavesdropping via randomized scheduling. Here we are interested in the achievable network flow under secrecyconstraints.

童朗教授简历：

Lang Tong received the B.E. degree from Tsinghua University, Beijing, P.R. China in 1985, and PhD degree in EE from the University of Notre Dame, Notre Dame, Indiana in 1991. He was a Postdoctoral Research Affiliate at the Information Systems Laboratory, Stanford University in 1991.

Lang Tong joined Cornell University in 1998 where he is now the Irwin and Joan Jacobs Professor in Engineering. Prior to joining Cornell University, he was on faculty at the West Virginia University and the University of Connecticut. He was also the 2001 Cor Wit Visiting Professor at the Delft University of Technology.

Lang Tong's research is in the general areas of signal processing, communications, networking,and information theory. He is a Fellow of IEEE for his contribution to statistical signalprocessing for wireless communications and networking. He was the recipient of the Young Investigator Award from the Office of Naval Research, the Outstanding Young Author Award from the IEEE Circuits and Systems Society, the 2004 best paper award (with Min Dong) from IEEE Signal Processing Society, and the 2004 Leonard G. Abraham Prize Paper Award from the IEEE Communications Society (with Parvathinathan Venkitasubramaniam and Srihari Adireddy).

He is also a coauthor of five student paper awards including the 2000 IEEE Signal Processing Society Best Young Author Award (Qing Zhao) and Student Paper Awards in ICASSP 2005 (Ting He, Youngchul Sung) and Student Paper Awards in ICASSP 2006 (Anima Anandkumar, Parv Venkitasubramaniam).