- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | WANG Yong, JIANG Gongkun, YIN Enmin. Image Encryption Based on 2D Coupled Map Lattices[J]. Journal of Southwest Jiaotong University, 2021, 56(6): 1337-1345, 1354. doi: 10.3969/j.issn.0258-2724.20200331
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Piecewise Logistic map (PLM) is introduced into 2D coupled map lattices (2DCML) model to face a tradeoff between complexity and efficiency of chaotic systems, and a transformation method based on transient status values is used to make the output sequence of the model obey a uniform distribution. Then, the T2DCML model is built. According to the T2DCML model, an image encryption algorithm is proposed, in which encryption algorithm, the pseudo-random sequence output by the model is used to construct two elementary transformation matrices and the image is scrambled by the matrices. Then, the bits of the state value are extracted from the model to construct an integer sequence and the scrambled image is diffused by the integer sequence. Finally, the encrypted image is produced by multi-rounds of confusion and diffusion. Simulation experiments and performance analysis show that the absolute average correlation coefficient of the algorithm is 0.001 3, the information entropy is 7.999 3, and the number of pixel change rate (NPCR) and the unified average change intensity (UACI) is 99.63% and 33.60%, respectively, revealing that the algorithm can effectively meet the needs of the safe transmission of images in the network.
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