Issue No.08 - August (2007 vol.18)
Wireless Sensor Networks (WSNs) are characterized by resource constraints and large scalability. Many applications of WSN require secure communication, a crucial component especially in hostile environments. However, the low computational capability and small storage budget within sensors render many popular public-key based cryptographic systems impractical. Symmetric key cryptography, on the other hand, is attractive due to efficiency. Nevertheless, establishing a shared key for communicating parties is a challenging problem. In this paper, we propose and analyze an in-situ PAirwise Key bootstrapping scheme (iPAK) for large-scale WSNs. Our theoretical analysis and simulation study demonstrate that iPAK can achieve high key-sharing probability between neighboring sensors and strong resilience against node capture attacks at the cost of a low storage overhead.
Wireless sensor networks, in-situ key establishment, key pre-distribution, Security
Liran Ma, Xiuzhen Cheng, Fang Liu, Fengguang An, Jose Rivera, "iPAK: An In-Situ Pairwise Key Bootstrapping Scheme for Wireless Sensor Networks", IEEE Transactions on Parallel & Distributed Systems, vol.18, no. 8, pp. 1174-1184, August 2007, doi:10.1109/TPDS.2007.1063