An improved chaotic cryptosystem with external key |
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| Affiliation: | 1. School of Computing and Communications, University of Technology Sydney, Australia;2. Department of Computer Science, Abdul Wali Khan University Mardan, Pakistan;1. Department of Electrical Engineering, City University of Hong Kong, Hong Kong, China;2. Tencent AI Lab, China;3. Shenzhen Institutes of Advanced Technology, CAS, Shenzhen, China;1. School of Computer Science and Technology, Xidian University, Xian, Shaanxi, China;2. Department of Computer Science, Hong Kong Baptist University, Hong Kong SAR, China |
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| Abstract: | In recent years, external key was introduced to chaotic cryptography by Pareek et al. and find its application in several discrete chaotic cryptosystems. The first part of this paper is devoted to the analysis of their essential weaknesses as well as some redundancies that contribute little to the security of those cryptosystems. Then, an improved scheme with all existing deficiencies and redundancies eliminated, is proposed. Theoretic analysis and numerical simulation both verify its superiority and security. |
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