Medical image encryption based on hyper-chaotic system
Lu Zhang, Tailin Han, Xuan Liu, Hong Liu · 2022
Medical images contain a large amount of private information like patient's lesions. Theft or destruction of medical images will cause irreparable losses to patients and medical institutions. How to realize the secure transmission of information in the process of telemedicine has become a research hotspot. In this paper, an encryption algorithm for hyper-chaotic systems based on DNA coding is proposed. First, a four-dimensional chaotic system is constructed by adding a dimension to the three-dimensional chaotic system, which improves the dynamic performance of the system, increases the parameters of the chaotic system, and improves the key space. Second, the algorithm complexity is increased by the added DNA encoding. The experimental results show that the key space encrypted by the method in this paper is 2469, and the key sensitivity can reach 10-16. At the same time, in the analysis of histogram, adjacent correlation and information entropy, the algorithm in this paper can achieve good security performance.