Title:  Location-Based Compromise-Tolerant Security Mechanisms for Wireless 
Sensor Networks

Abstract: Node compromise is a serious threat to wireless sensor networks 
deployed in unattended and hostile environments. To mitigate the impact of 
compromised nodes, we propose a suite of location-based
compromise-tolerant security mechanisms. Based on a new cryptographic 
concept called pairing, we propose the notion of location-based keys (LBKs) 
by binding private keys of individual nodes to both their IDs and geographic 
locations. We then develop an LBK-based neighborhood authentication scheme 
to localize the impact of compromised nodes to their vicinity. We also 
present efficient approaches to establish a shared key
between any two network nodes. In contrast to previous key establishment 
solutions, our approaches feature nearly perfect resilience to node 
compromise, low communication and computation overhead, low memory 
requirements, and high network scalability. Moreover, we demonstrate the 
efficacy of LBKs in counteracting
several notorious attacks against sensor networks. Finally, we propose a 
location-based threshold-endorsement scheme, called LTE, to thwart the 
infamous bogus data injection attack, in which adversaries inject lots of 
bogus data into the network. The utility of LTE in achieving remarkable 
energy savings is validated by detailed performance evaluation.

This paper is to appear in IEEE JSAC, Special Issue on Wireless Ad-Hoc 
Security. You are welcome to download it from 
http://www.ecel.ufl.edu/~zhang/publication.html

Sincerely yours,
*****************************************************
Yanchao "David" Zhang
Ph.D. candidate
Wireless Networks Laboratory (WINET)
Department of Electrical & Computer Engineering
University of Florida
http://www.ecel.ufl.edu/~zhang