13-11-2012, 03:13 PM
Design and Implementati on of TARF:A Trust-Aware Routing Framework for WSNs
ABSTRACT
The multihop routing in wireless sensor networks
(WSNs) offers little protection against identity deception
through replaying routing information. An adversary can
exploit this defect to launch various harmful or even
devastating attacks against the routing protocols,
including sinkhole attacks, wormhole attacks, and Sybil
attacks. The situation is further aggravated by mobile and
harsh network conditions. Traditional cryptographic
techniques or efforts at developing trust-aware routing
protocols do not effectively address this severe problem.
To secure the WSNs against adversaries misdirecting the
multihop routing, we have designed and implemented
TARF, a robust trust-aware routing framework for
dynamic WSNs. Without tight time synchronization or
known geographic information, TARF provides
trustworthy and energy-efficient route. Most importantly,
TARF proves effective against those harmful attacks
developed out of identity deception; the resilience of
TARF is verified through extensive evaluation with both
simulation and empirical experiments on large-scale
WSNs under various scenarios including mobile and RFshielding
network conditions. Further, we have
implemented a low-overhead TARF module in TinyOS;
as demonstrated, this implementation can be incorporated
into existing routing protocols with the least effort. Based
on TARF, we also demonstrated a proof-of-concept
mobile target detection application that functions well
against an antidetection mechanism.