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Security of chaos-based secure communications in a large community

Wang Kai Pei Wen-Jiang Zhou Jian-Tao Zhang Yi-Feng Zhou Si-Yuan

Security of chaos-based secure communications in a large community

Wang Kai, Pei Wen-Jiang, Zhou Jian-Tao, Zhang Yi-Feng, Zhou Si-Yuan
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Publishing process
  • Received Date:  24 August 2010
  • Accepted Date:  08 October 2010
  • Published Online:  15 July 2011

Security of chaos-based secure communications in a large community

  • 1. Department of Radio Engineering, Southeast University, Key Laboratory of Underwater Acoustic Signal Processing of Ministry of Education, Southeast University, Nanjing 210096, China

Abstract: In this paper, we present an attack on a cryptosystem designed by using a spatiotemporal chaotic system. We show that the decryption system proposed in (Phys. Rev. E 66, 065202 (2002)) degenerates to the one-dimensional map under the constant input, and it is insensitive to the slight perturbations to input in specially selected intervals. Consequently, the attacker can use a very simple optimization algorithm to obtain the proper input value within only hundreds of iterations. Furthermore, we prove that there exits a linear dependency between the secret key and the obtained input value, so that the attacker can break this spatiotemporal chaos-based secure communication scheme easily. Both theoretical and experimental results show that the lack of security discourages the use of these cryptosystems for practical application.

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