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Hyper-chaos encryption using convolutional masking and model free unmasking |
| Qi Guo-Yuan (齐国元), Sandra Bazebo Matondo |
| Department of Electrical Engineerin, Tshwane University of Technology Pretoria, South Africa, 0001 |
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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.
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Received: 05 July 2013
Revised: 04 November 2013
Accepted manuscript online:
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PACS:
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05.45.Vx
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(Communication using chaos)
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05.45.Xt
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(Synchronization; coupled oscillators)
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05.45.Pq
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(Numerical simulations of chaotic systems)
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05.45.-a
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(Nonlinear dynamics and chaos)
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| Fund: 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. |
Corresponding Authors:
Qi Guo-Yuan
E-mail: qig@tut.ac.za
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| About author: 05.45.Vx; 05.45.Xt; 05.45.Pq; 05.45.-a |
Cite this article:
Qi Guo-Yuan (齐国元), Sandra Bazebo Matondo Hyper-chaos encryption using convolutional masking and model free unmasking 2014 Chin. Phys. B 23 050507
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