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Identifying attributes and insecurity of a public-channel key exchange protocol using chaos synchronization

Author

Listed:
  • Han, S.
  • Chang, E.
  • Dillon, T.
  • Hwang, M.
  • Lee, C.

Abstract

Klein et al. proposed a key exchange protocol using chaos synchronization. The first protocol comprises two parties with chaotic dynamics that are mutually coupled and undergo a synchronization process, at the end of which they can use their identical dynamical state as an encryption key. From cryptographic point of view, their key exchange protocol is a key agreement protocol. Klein et al. claimed that their key agreement can be carried out over a public channel. In order to increase the key space and decrease the precision of the calculation, they made an extension of the system to a network of N Lorenz equations. In this paper, we will provide a cryptanalysis of their key agreement protocol. We will first point out some weaknesses, and then show that their protocol is not secure against several attacks including impersonation attack.

Suggested Citation

  • Han, S. & Chang, E. & Dillon, T. & Hwang, M. & Lee, C., 2009. "Identifying attributes and insecurity of a public-channel key exchange protocol using chaos synchronization," Chaos, Solitons & Fractals, Elsevier, vol. 40(5), pages 2569-2575.
    • Handle: RePEc:eee:chsofr:v:40:y:2009:i:5:p:2569-2575
    DOI: 10.1016/j.chaos.2007.10.050
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    References listed on IDEAS

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