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Authentic Delay Bounded Event Detection in Heterogeneous Wireless Sensor Networks

Dr. Raheem A. Beyah
Thursday, March 20, 2008
10:00 AM ~ 11:00 AM, Harris Center 101

Abstract


In critical sensor deployments it is important to ensure the authenticity and integrity of sensed data. Further, one must ensure that false data injected into the network by malicious nodes is not perceived as accurate data. In this talk we present the Dynamic Energy-based Encoding and Filtering (DEEF) framework to detect the injection of false data into a sensor network. DEEF requires that each sensed event report be encoded using a simple encoding scheme based on a keyed hash. The key to the hashing function dynamically changes as a function of the transient energy of the sensor, thus requiring no need for re-keying. Depending on the cost of transmission vs. computational cost of encoding, it may be important to remove data as quickly as possible. Accordingly, DEEF can provide authentication at the edge of the network or authentication inside of the sensor network. Depending on the optimal configuration, as the report is forwarded, each node along the way verifies the correctness of the encoding probabilistically and drops those that are invalid. We have evaluated DEEF's feasibility and performance through analysis. Our results show that DEEF, without incurring transmission overhead (increasing packet size), is able to eliminate 90% - 99% of false data injected from an outsider within 9 hops before it reaches the sink.

Short Bio


Dr. Raheem Beyah, a native of Atlanta, Ga., is an Assistant Professor in the Department of Computer Science at Georgia State University where he leads the Georgia State Communications Assurance and Performance Group (CAP). He is also an Adjunct Professor in the School of Electrical and Computer Engineering at the Georgia Institute of Technology. He received his Bachelor of Science in Electrical Engineering from North Carolina A&T State University in 1998. He received his Masters and Ph.D. in Electrical and Computer Engineering from the Georgia Institute of Technology in 1999 and 2003, respectively. Prior to joining Georgia State in 2005, Dr. Beyah was a research faculty member with the Georgia Institute of Technology's Communications Systems Center (CSC) for four years and remains a part of the Center. He also worked as a consultant in Andersen Consulting's (now Accenture) Network Solutions group. He is an Associate Editor of the Wiley Security and Communication Networks Journal and the Wiley Wireless Communications and Mobile Computing Journal. His research interests include network security, wireless networks, network traffic characterization and performance, and security visualization. He is a member of IEEE, ACM, and NSBE.

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