Secure neighbor discovery in wireless networks: formal investigation of possibility

  • Authors:
  • Marcin Poturalski;Panos Papadimitratos;Jean-Pierre Hubaux

  • Affiliations:
  • EPFL, Switzerland;EPFL, Switzerland;EPFL, Switzerland

  • Venue:
  • Proceedings of the 2008 ACM symposium on Information, computer and communications security
  • Year:
  • 2008

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Abstract

Wireless communication enables a broad spectrum of applications, ranging from commodity to tactical systems. Neighbor discovery (ND), that is, determining which devices are within direct radio communication, is a building block of network protocols and applications, and its vulnerability can severely compromise their functionalities. A number of proposals to secure ND have been published, but none have analyzed the problem formally. In this paper, we contribute such an analysis: We build a formal model capturing salient characteristics of wireless systems, most notably obstacles and interference, and we provide a specification of a basic variant of the ND problem. Then, we derive an impossibility result for a general class of protocols we term "time-based protocols," to which many of the schemes in the literature belong. We also identify the conditions under which the impossibility result is lifted. Moreover, we explore a second class of protocols we term "time- and location-based protocols," and prove they can secure ND.