A novel chaotic encryption scheme based on image segmentation and multiple diffusion models

作者：Wang, Mingxu; Wang, Xingyuan^*; Zhang, Yingqian; Gao, Zhenguo

来源：Optics and Laser Technology, 2018, 108: 558-573.

DOI：10.1016/j.optlastec.2018.07.052

• Chaotic map
• Hash algorithm
• Permutation and diffusion
• Security analysis
• Image encryption

Based on image segmentation and multiple diffusion models, a novel chaotic encryption scheme is proposed in this paper. Firstly, a random key is generated to calculate the initial value and control parameter of chaotic map. Secondly, the SHA-512 hash algorithm is used to compute a hash array based on plain image, which is used as secret keys. Finally, according to parts values of that array, an image are divide into sub-blocks and some diffusion model are selected respectively. It is proved by simulation results and security analysis that the proposed scheme has a better security and can withstand common attacks.

• 出版日期2018-12
• 单位厦门大学; 大连理工大学; 大连海事大学