Abstract
For the purpose of designing better color image cryptosystems, it is necessary to perform a mathematically rigorous security analysis for the existing ones. In this study, a Choquet fuzzy integral-based color image cryptosystem with shift–diffusion architecture is cryptanalyzed. Firstly, it is demonstrated that the color image cryptosystem is irreversible, since the encryption algorithm cannot be decrypted correctly. Meanwhile, a simple improvement is presented to guarantee the reversibility. Moreover, a cryptanalysis of the improved scheme is proposed and results show the improved color image cryptosystem can be broken by a known plain/cipher image pair. The shift–diffusion architecture should alter the external key every time for security consideration.
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Acknowledgments
The work was supported by the National Natural Science Foundation of China (Grant Nos. 61502399, 61462032, 61403313), the Fundamental Research Funds for the Central Universities (Grant Nos. XDJK2015C077, SWU115016), the Natural Science Foundation of Jiangxi Province (Grant No. 20142BAB217012), and the Natural Science Foundation Project of Chongqing CSTC (Grant No. cstc2015jcyjA0704).
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Zhang, Y., Wen, W., Wu, Y. et al. Deciphering an RGB color image cryptosystem based on Choquet fuzzy integral. Neural Comput & Applic 28, 165–169 (2017). https://doi.org/10.1007/s00521-015-2045-2
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DOI: https://doi.org/10.1007/s00521-015-2045-2