Journal
OPTICS AND LASERS IN ENGINEERING
Volume 66, Issue -, Pages 1-9Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2014.08.010
Keywords
Double-image encryption; Cross-talk disturbance; Lightweight pixel confusion; Gyrator transform
Categories
Funding
- National Natural Science Foundation of China [61271350, 61374178, 61202085]
- Fundamental Research Funds for the Central Universities [N120504005]
- Liaoning Provincial Natural Science Foundation of China [201202076]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120042120010]
- Ph.D. Start-up Foundation of Liaoning Province, China [20111001, 20121001, 20121002]
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Recently, a double-image encryption scheme using local pixel scrambling technique and gyrator transform has been proposed [Opt Lasers Eng 2013; 51: 1327-31]. Through our simulations, there is serious cross-talk disturbance in the phase-based image when the encrypted data undergoes noise perturbation or occlusion attack. The disturbance will cause serious deterioration in the retrieved phase-based image and bring about visibility ambiguities to the receiver, and hence downgrades the practicability of the cryptosystem. In this paper, detailed analysis of the cross-talk disturbance in the original scheme will be firstly given out, and then the corresponding improvement is subsequently proposed. Numerical simulations results indicate that the improved scheme well address the cross-talk disturbance and further enhance the security of the original cryptosystem. (C) 2014 Elsevier Ltd. All rights reserved.
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