Journal
INTERNATIONAL JOURNAL OF MULTIMEDIA DATA ENGINEERING & MANAGEMENT
Volume 11, Issue 4, Pages 1-24Publisher
IGI GLOBAL
DOI: 10.4018/IJMDEM.2020100101
Keywords
Hyper-Chaotic System; Image Encryption; Parallel Computing; S-AES; SHA-256
Categories
Funding
- National Science and Technology Major Project of China [2018YFB0204304]
- Tianjin Research Innovation Project for Postgraduate Students [2019YJSB06]
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Image encryption algorithms usually have two processes: permutation and diffusion. In order to enhance the performance of the permutation process, this study proposes a dynamic permutation method based on XOR operation and sorting. Combined with the hyper-chaotic system, SHA-256, the proposed permutation method and the simplified advanced encryption system (S-AES), a novel image encryption algorithm is presented in this paper. Firstly, the SHA-256 is used to generate initial condition values of the chaotic system and control parameters of the permutation method. Then, the chaotic system generates pseudo-random numbers, which are used in the permutation method and S-AES. Finally, the proposed permutation method and S-AES are used to encrypt the plain-image. In particular, parallel computing is used in this study to accelerate encryption speed. The results and analysis indicate that the proposed algorithm has excellent security to resist various typical attacks and fast encryption speed.
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