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Journal of Information Science and Engineering, Vol. 27 No. 2, pp. 403-418 (March 2011)

Location Privacy Protection Using Independent ID Update for WLANs*

PO-JEN CHUANG, JER-SHENG DENG AND CHIH-SHIN LIN
 Department of Electrical Engineering
Tamkang University
Tamsui, New Taipei City, 251 Taiwan

A desirable location privacy protection scheme is important for securing node communication in a wireless local area network (WLAN). By pausing transmission or updating nodes independently, such a scheme can prevent nodes from being tracked or communication information from being snapped. This paper first introduces an ID Tracking Approach to show that nodes which swap IDs with other nodes in existing location privacy protection schemes are actually easy to track. To improve the situation, we then propose a new user-centric scheme ¡V the Shuffle scheme ¡V which is based mainly on local synchronization and independent ID update. Experimental evaluation shows that the special design of node ID shuffling enables the proposed Shuffle scheme to yield better location privacy than schemes which swap node IDs.

Keywords: wireless local area networks (WLANs), location privacy protection, usercentric, local synchronization, independent ID update, experimental performance evaluation

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Received June 29, 2009; revised September 2 & December 22, 2009; accepted February 9, 2010.
Communicated by Wanjiun Liao.
* A preliminary version of this paper was presented at the 2008 International Computer Symposium, Taipei, Taiwan, November 2008.