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J. Sens. Actuator Netw. 2014, 3(3), 181-206; doi:10.3390/jsan3030181
Article

An Authenticated Key Agreement Scheme for Wireless Sensor Networks

1,* , 2
 and 1
1 School of Computer and Mathematical Sciences, Auckland University of Technology, Auckland 1142, New Zealand 2 School of Engineering, Auckland University of Technology, Auckland 1142, New Zealand
* Author to whom correspondence should be addressed.
Received: 6 May 2014 / Revised: 17 June 2014 / Accepted: 17 June 2014 / Published: 1 July 2014
Download PDF [464 KB, 3 July 2014; original version 1 July 2014]

Abstract

We propose a new authenticated key agreement scheme based on Blom’s scheme, but using multiple master keys and public keys in permutations to compute the private keys in each node. The computations are over a small prime field, and by storing them in a random order in the node, the private-public-master-key associations (PPMka) of the private keys are lost. If a node is captured, the PPMka of the private keys cannot be determined with certainty, making it difficult to begin to attack the scheme. We obtained analytical results to show that, using suitable keying parameters, the probability of discovering the correct PPMka can be made so small, that a very powerful adversary needs to capture the entire network of tens of thousands of nodes or expend an infeasible amount of effort to try all of the possible solutions. We verified our results using computer-simulated attacks on the scheme. The unknown PPMka enables our scheme to break free from the capture threshold of the original Blom’s scheme, so that it can be used in large networks of low-resource devices, such as sensor nodes.
Keywords: key agreement; Blom; security; authentication; ad hoc; mobile; sensors; wireless sensor networks key agreement; Blom; security; authentication; ad hoc; mobile; sensors; wireless sensor networks
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Yang, M.L.; Al-Anbuky, A.; Liu, W. An Authenticated Key Agreement Scheme for Wireless Sensor Networks. J. Sens. Actuator Netw. 2014, 3, 181-206.

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