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Istituto di Scienza e Tecnologie dell'Informazione     
Di Pietro R., Oligeri G., Soriente C., Tsudik G. Intrusion-resilience in mobile unattended WSNs. In: INFOCOM 2010 - IEEE INFOCOM 2010 (San Diego, California, 15-19 March 2010). Proceedings, IEEE, 2010.
 
 
Abstract
(English)
Wireless Sensor Networks (WSNs) are susceptible to a wide range of attacks due to their distributed nature, limited sensor resources and lack of tamper-resistance. Once a sensor is corrupted, the adversary learns all secrets and (even if the sensor is later released) it is very difficult for the sensor to regain security, i.e., to obtain intrusion-resilience. Existing solutions rely on the presence of an on-line trusted third party, such as a sink, or on the availability of secure hardware on sensors. Neither assumption is realistic in large-scale Unattended WSNs (UWSNs), characterized by long periods of disconnected operation and periodic visits by the sink. In such settings, a mobile adversary can gradually corrupt the entire network during the intervals between sink visits. As shown in some recent work, intrusionresilience in UWSNs can be attained (to a degree) via cooperative self-healing techniques. In this paper, we focus on intrusion-resilience in Mobile Unattended Wireless Sensor Networks ( UWSNs) where sensors move according to some mobility model. We argue that sensor mobility motivates a specific type of adversary and defending against it requires new security techniques. Concretely, we propose a cooperative protocol that - by leveraging sensor mobility - allows compromised sensors to recover secure state after compromise. This is obtained with very low overhead and in a fully distributed fashion. We provide a thorough analysis of the proposed protocol and support it by extensive simulation results.
URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5462056
DOI: 10.1109/INFCOM.2010.5462056
Subject Wireless Sensor Networks
Intrusion resilience
C.2 Computer-Communication Networks


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