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DP²AC: Distributed Privacy-Preserving Access Control in Sensor Networks

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3 Author(s)
Yanchao Zhang ; Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ ; Yanchao Zhang ; Kui Ren

The owner and users of a sensor network may be different, which necessitates privacy-preserving access control. On the one hand, the network owner need enforce strict access control so that the sensed data are only accessible to users willing to pay. On the other hand, users wish to protect their respective data access patterns whose disclosure may be used against their interests. This paper presents DP2 AC, a Distributed Privacy- Preserving Access Control scheme for sensor networks, which is the first work of its kind. Users in DP2 AC purchase tokens from the network owner whereby to query data from sensor nodes which will reply only after validating the tokens. The use of blind signatures in token generation ensures that tokens are publicly verifiable yet unlinkable to user identities, so privacy- preserving access control is achieved. A central component in DP2 AC is to prevent malicious users from reusing tokens. We propose a suite of distributed techniques for token-reuse detection (TRD) and thoroughly compare their performance with regard to TRD capability, communication overhead, storage overhead, and attack resilience. The efficacy and efficiency of DP2 AC are confirmed by detailed performance evaluations.

Published in:

INFOCOM 2009, IEEE

Date of Conference:

19-25 April 2009

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