Energy efficient node-to-node authentication and communication confidentiality in wireless sensor networks

  • Authors:
  • Roberto Di Pietro;Luigi V. Mancini;Alessandro Mei

  • Affiliations:
  • Dip.to di Informatica, Università di Roma "La Sapienza", Roma, Italy;Dip.to di Informatica, Università di Roma "La Sapienza", Roma, Italy;Dip.to di Informatica, Università di Roma "La Sapienza", Roma, Italy

  • Venue:
  • Wireless Networks
  • Year:
  • 2006

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Abstract

A distributed Wireless Sensor Network (WSN) is a collection of low-end devices with wireless message exchange capabilities. Due to the scarcity of hardware resources, the lack of network infrastructures, and the threats to security, implementing secure pair-wise communications among any pair of sensors is a challenging problem in distributed WSNs. In particular, memory and energy consumption as well as resilience to sensor physical compromise are the most stringent requirements. In this paper, we introduce a new threat model to communications confidentiality in WSNs, the smart attacker model. Under this new, more realistic model, the security features of previously proposed schemes decrease drastically. We then describe a novel pseudo-random key pre-deployment strategy ESP that combines all the following properties: (a) it supports an energy-efficient key discovery phase requiring no communications; (b) it provides node to node authentication; (c) it is highly resistant to the smart attacker. We provide both asymptotic results and extensive simulations of the schemes that are being proposed.