Enlighten Me! Secure Key Assignment in Wireless Sensor Networks
Author(s):
Matthias Gauger, University of Bonn, Germany ; Olga Saukh, EMPA, Switzerland; Pedro Marron, University of Bonn and Fraunhofer IAIS, Germany
Abstract:
The availability of secret keys is a precondition for the use of many security solutions and protocols. However, securely assigning such keys to nodes is a challenging task in the context of wireless sensor networks. In this paper we present a novel solution for a secure key assignment in wireless sensor networks that can be used during the initial configuration of nodes or for an ad-hoc key assignment by mobile nodes. The idea is to transmit the key information over a side channel using a controllable light source as the sender and the light sensors available on wireless sensor nodes as receivers. We demonstrate that our solution fulfills the relevant security requirements while at the same time being cost effective and easy to use.
