Chaotic Image Encryption Algorithm by Correlating Keys with Plaintext  

作　　者：Zhu Congxu Sun Kehui 

机构地区：[1]School of Information Science and Engineering, Central South University, Changsha 410083, P. R. China [2]School of Physics and Electronics, Central South University, Changsha 410083, P. R. China

出　　处：《China Communications》2012年第1期73-79,共7页中国通信（英文版）

基　　金：Acknowledgements This work was supported by the National Natural Science Foundation of China under Grants No. 61073187 and No. 61161006; the Hunan Provincial Natural Science Foundation of China under Grant No. 10JJ6093 and the Hunan Provincial Science and Technology Program under Ccant No. 2010GK2003.

摘　　要：A novel image encryption scheme based on the modified skew tent map was proposed in this paper. In the key generating procedure, the algorithm generates a plaintext-dependent secret keys set. In the encryption process, the diffusion operation with cipher output feedback is introduced. Thus, cipher-irmge is sensitive to both initial keys and plaintext through only one round diffusion operation. The key space is large. As a resuk, the algorithm can effectively resist differential attacks, statistical attacks, brute-force attacks, known plaintext and chosen plaintext attacks. Perforrmnce test and security analysis demonstrates that this algorithm is eficient and reliable, with high potential to be adopted for secure comnmnications.A novel image encryption scheme based on the modified skew tent map was proposed in this paper. In the key generating procedure, the algorithm generates a plaintext-dependent secret keys set. In the encryption process, the diffusion operation with cipher output feedback is introduced. Thus, cipher-image is sensitive to both initial keys and plaintext through only one round diffusion operation. The key space is large. As a result, the algorithm can effectively resist differential attacks, statistical attacks, brute-force attacks, known plaintext and chosen plaintext attacks. Performance test and security analysis demonstrates that this algorithm is eficient and reliable, with high potential to be adopted for secure communications.

关 键 词：skew tent map chaotic system image encryption secure corrrrmnieation 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP393.08[自动化与计算机技术—计算机科学与技术]