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Meeting and Seminar Archive:

Date:  Oct 12, 2009 ~IEEE SPS Distinguished Lecturer~

Title: Detection of Information Flow and Anonymous Networking

Speaker: Prof. Lang Tong, School of Electrical and Computer Engineering, Cornell University


Abstract: In a wireless network, transmission activities can be easily monitored using simple devices. Given the record of transmissions from a set of nodes, one may be able to assertain whether these nodes are engaged in some networking operations. While the content of a wireless transmissions can be protected by cryptographical techniques, the acts of transmission may reveal crtical information about network operations such as routing and multicasting.

In this talk, we consider two related problems. The first is the problem of flow detection: given observations from a set of traffic sensors, to what extent can the presence of an information flow be detected? We present results on the fundamental limit of detectability. The second probem is anonymous networking: to what extent can we hide an information flow. Here we use information theoretic measures to characterize the tradeoff between anonymity vs. network throughput.  



Lang Tong is the Irwin and Joan Jacobs Professor in Engineering at Cornell University. He received his PhD degree from the University of Notre Dame and was a Postdoc Research Affilate at Stanford University.

Lang Tong's research interest lies in the general area of statistical signal processing, communication systems, and networks. He received the 2004 Best Paper Award from the IEEE Signal Processing Society, the 2004 Leonard G. Abraham Prize Paper Award from the IEEE Communications Society, and the 1993 Outstanding Young Author Award from the IEEE Circuits and Systems Society.

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