Delay Analysis of Physical-Layer Key Generation in Dynamic Roadside-to-Vehicle Networks

Secret key generation by extracting the shared randomness in a wireless fading channel is a promising way to ensure wireless communication security. Previous studies only consider key generation in static networks, but real-world key establishments are usually dynamic. In this paper, for the first time, the authors investigate the pairwise key generation in dynamic wireless networks with a center node and random arrival users (e.g., roadside units (RSUs) with vehicles). The authors establish the key generation model for these kinds of networks. The authors propose a method based on discrete Markov chain to calculate the average time a user will spend on waiting and completing the key generation, called average key generation delay (AKGD). The authors' method can tackle both serial and parallel key generation scheduling under various conditions. The authors propose a novel scheduling method, which exploits wireless broadcast characteristic to reduce AKGD and probing energy. The authors conduct extensive simulations to show the effectiveness of the model and method. The analytical and simulation results match each other.

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  • English

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  • Accession Number: 01633544
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 16 2017 11:15AM