Cryptanalyzing a nonlinear chaotic algorithm (NCA) for image encryption |
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| Authors: | G Alvarez Shujun Li |
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| Institution: | 1. Department of Computer Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran;2. Department of Medical Radiation Engineering, Amirkabir University of Technology, Tehran, Iran;3. Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;1. College of Software, Henan University, Kaifeng 475004, China;2. School of Computer and Information Engineesring, Henan University, Kaifeng 475004, China;3. Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China;4. Shanghai Key Lab of Intelligent Information Processing, School of Computer Science, Fudan University, Shanghai 200433, China;5. Department of Physics, Humboldt University, 12489 Berlin, Germany;6. Potsdam Institute for Climate Impact Research (PIK), 14473 Potsdam, Germany |
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| Abstract: | This paper describes the security weakness of a recently proposed image encryption algorithm based on a logistic-like new chaotic map. We show that the chaotic map’s distribution is far from ideal, thus making it a bad candidate as a pseudo-random stream generator. As a consequence, the images encrypted with this algorithm are shown to be breakable through different attacks of variable complexity. |
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