中国物理B ›› 2014, Vol. 23 ›› Issue (5): 50507-050507.doi: 10.1088/1674-1056/23/5/050507

• GENERAL • 上一篇    下一篇

Hyper-chaos encryption using convolutional masking and model free unmasking

齐国元, Sandra Bazebo Matondo   

  1. Department of Electrical Engineerin, Tshwane University of Technology Pretoria, South Africa, 0001
  • 收稿日期:2013-07-05 修回日期:2013-11-04 出版日期:2014-05-15 发布日期:2014-05-15
  • 基金资助:
    Project supported by the Incentive Funding National Research Foundation of South Africa (Grant No. 70722) and the Eskom Tertiary Education Support Programme of South Africa.

Hyper-chaos encryption using convolutional masking and model free unmasking

Qi Guo-Yuan (齐国元), Sandra Bazebo Matondo   

  1. Department of Electrical Engineerin, Tshwane University of Technology Pretoria, South Africa, 0001
  • Received:2013-07-05 Revised:2013-11-04 Online:2014-05-15 Published:2014-05-15
  • Contact: Qi Guo-Yuan E-mail:qig@tut.ac.za
  • About author:05.45.Vx; 05.45.Xt; 05.45.Pq; 05.45.-a
  • Supported by:
    Project supported by the Incentive Funding National Research Foundation of South Africa (Grant No. 70722) and the Eskom Tertiary Education Support Programme of South Africa.

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摘要： In this paper, during the masking process the encrypted message is convolved and embedded into a Qi hyper-chaotic system characterizing a high disorder degree. The masking scheme was tested using both Qi hyper-chaos and Lorenz chaos and indicated that Qi hyper-chaos based masking can resist attacks of the filtering and power spectrum analysis, while the Lorenz based scheme fails for high amplitude data. To unmask the message at the receiving end, two methods are proposed. In the first method, a model-free synchronizer, i.e. a multivariable higher-order differential feedback controller between the transmitter and receiver is employed to de-convolve the message embedded in the receiving signal. In the second method, no synchronization is required since the message is de-convolved using the information of the estimated derivative.

关键词: Qi hyper-chaos, masking, high-order differentiator, chaos-based encryption

Abstract: In this paper, during the masking process the encrypted message is convolved and embedded into a Qi hyper-chaotic system characterizing a high disorder degree. The masking scheme was tested using both Qi hyper-chaos and Lorenz chaos and indicated that Qi hyper-chaos based masking can resist attacks of the filtering and power spectrum analysis, while the Lorenz based scheme fails for high amplitude data. To unmask the message at the receiving end, two methods are proposed. In the first method, a model-free synchronizer, i.e. a multivariable higher-order differential feedback controller between the transmitter and receiver is employed to de-convolve the message embedded in the receiving signal. In the second method, no synchronization is required since the message is de-convolved using the information of the estimated derivative.

Key words: Qi hyper-chaos, masking, high-order differentiator, chaos-based encryption

中图分类号:  (Communication using chaos)

  • 05.45.Vx
05.45.Xt (Synchronization; coupled oscillators) 05.45.Pq (Numerical simulations of chaotic systems) 05.45.-a (Nonlinear dynamics and chaos)