Abhishek RayChaudhuri
Abstract
Contextual privacy threat arises from divulging the location and time of the triggering events to adversaries. Since, the context of the triggering events serve as useful information to the eavesdropper, data encryption alone renders inadequate for protecting total privacy of a sensing task. Obfuscation of the contextual information is a natural solution to the contextual privacy problem. Since both location and time of a sensed event constitute its context, obfuscation can be performed both spatially and temporally. In [1], the authors employ spatial obfuscation techniques (controlled flooding, probabilistic flooding and fake messaging) by focusing mainly on the location component of the contextual information. Nevertheless, increased message transmissions place an additional burden on the power constrained sensor nodes.
- P. Kamat, Y. Zhang, W. Trappe and C. Ozturk, "Enhancing source-location privacy in sensor network routing," Proc. 25th Int'l Conference on Distributed Computing Systems (ICDCS 2005), Columbus, Ohio, pp. 599--608, June 2005. Google Scholar
Digital Library
- T. M. Cover and J. A. Thomas, Elements of Information Theory, John Wiley, 1991. Google ScholarDigital Library
- L. Ekroot and T. M. Cover, "The entropy of a randomly stopped sequence," IEEE Transactions on Information Theory, vol. 37, no. 6, pp. 1641--1644, November 1991.Google ScholarDigital Library
- S. M. Ross, Stochastic Processes, 2nd Edition, John Wiley, 1996.Google Scholar
- J. N. Kapur and H. K. Kesavan, Entropy Optimization Principles with Applications, John Wiley, 1992.Google ScholarCross Ref
Index Terms
- Obfuscating temporal context of sensor data by coalescing at source
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