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Issue No. 08 - August (2009 vol. 8)
ISSN: 1536-1233
pp: 1023-1038
Min Shao , Microsoft Corp., Redmond
Sencun Zhu , Pennsylvania State University, University Park
Wensheng Zhang , Iowa State University, Ames
Guohong Cao , Pennsylvania State University, University Park
Yi Yang , Pennsylvania State University, University Park
The demand for efficient data dissemination/access techniques to find relevant data from within a sensor network has led to the development of Data-Centric Sensor (DCS) networks, where the sensor data instead of sensor nodes are named based on attributes such as event type or geographic location. However, saving data inside a network also creates security problems due to the lack of tamper resistance of the sensor nodes and the unattended nature of the sensor network. For example, an attacker may simply locate and compromise the node storing the event of his interest. To address these security problems, we present pDCS, a privacy-enhanced DCS network which offers different levels of data privacy based on different cryptographic keys. pDCS also includes an efficient key management scheme to facilitate the management of multiple types of keys used in the system. In addition, we propose several query optimization techniques based on euclidean Steiner Tree and keyed Bloom Filter (KBF) to minimize the query overhead while preserving query privacy. Finally, detailed analysis and simulations show that the KBF scheme can significantly reduce the message overhead with the same level of query delay and maintain a very high level of query privacy.
Security, privacy, data centric, keyed Bloom Filter, wireless sensor networks.

W. Zhang, M. Shao, Y. Yang, G. Cao and S. Zhu, "pDCS: Security and Privacy Support for Data-Centric Sensor Networks," in IEEE Transactions on Mobile Computing, vol. 8, no. , pp. 1023-1038, 2008.
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