Synchronously scrambled diffuse image encryption method based on a new cosine chaotic map

• Published in: Chinese physics B Vol. 31; no. 8; pp. 80504 - 343
• Main Authors: Yan, Xiaopeng, Wang, Xingyuan, Xian, Yongjin
• Format: Journal Article
• Language: English
• Published: Chinese Physical Society and IOP Publishing Ltd 01.07.2022; Guangxi Key Laboratory of Multi-source Information Mining&Security,Guangxi Normal University,Guilin 541004,China; School of Information Science and Technology,Dalian Maritime University,Dalian 116026,China%School of Information Science and Technology,Dalian Maritime University,Dalian 116026,China
• Subjects: chaos mapping; cosine mapping; cyclic information wave; doppler effect; image encryption; chaos mapping; cosine mapping; doppler effect; image encryption; cyclic information wave
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/ac5a43

We present a new cosine chaotic mapping proved by chaos theory test and analysis such that the system has good cryptography properties, wide chaos range, simple structure, and good sensitivity to initial value, and the mapping can meet the needs of chaotic image encryption. Based on the cosine chaotic system, we propose a new encryption method. First, according to the cyclic characteristics of the mapping, the cyclic information wave is simulated. Second, the quasi-Doppler effect is used to synchronously scramble and diffuse the image to obfuscate the original pixel. Finally, the XOR diffusion of image pixels is carried out by information wave to further enhance the encryption effect. Simulation experiment and security analysis show that the algorithm has good security, can resist the common attack mode, and has good efficiency.