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September 21, 2009

Mtg: Detection of Information Flow and Anonymous Networking

by @ 12:07 pm. Filed under ALL, Communications, Electronics Design
 

MONDAY October 12, 2009
SCV Signal Processing Chapter
Speaker: Prof. Lang Tong, School of Electrical and Computer Engineering, Cornell University, and SPS Distinguished Lecturer
Time: Fast Food & drinks at 6:30 PM, Presentation at 7:00 PM
Cost: $2 donation recommended
Place: National Semiconductor, Building E Conference Center, 2900 Semiconductor Dr., Santa Clara
RSVP: not required
Web: www.ewh.ieee.org/r6/scv/sps

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 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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