报告题目: |
无线通信讲席教授组系列报告：Flow Detection and Anonymous Networking |
报告人: |
Lang Tong |
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Irwin and Joan Jacobs Professor in Engineering School of Electrical
and Computer Engineering Cornell University,Ithaca,IEEE Fellow
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报告时间: |
2009-03-20 14:00 |
报告地点: |
FIT楼多功能厅 |
主办单位: |
电子工程系 |
简介: |
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 ascertain whether these nodes are engaged in some networking operations. While the content of a wireless transmission can be protected by cryptographical techniques, the acts of transmission may reveal critical 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 problem 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. |
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