摘要
基于混沌的图像加密方法在安全性、适应性上具有优势.文中在对原有的混沌图像加密算法安全性分析的基础上,提出了一种基于Logistic和Chebyshev双混沌映射的数字灰度图像加密算法.借助基于明文产生的辅助密钥、初始密钥以及由双混沌系统产生交替分段相互置乱的密码序列是本算法的核心.计算机仿真及统计特性、安全性分析表明,该加密算法具有良好的加密效果和较高的安全性能,密钥空间达到255×10120.
As the image encryption based on chaos is of high security and adaptability,this paper analyzes the security of the conventional image encryption algorithms based on chaotic systems and proposes a new image encryption algorithm based on diploid Logistic and Chebyshev chaotic maps.The auxiliary and the initial secret keys based on original image,as well as the reciprocally-disordered cipher sequences alternated in subsection and generated by the diploid chaotic systems,are the kernel parts of the proposed algorithm.Both the simulated and statistical results and the security analysis show that the proposed algorithm is of excellent encryption effect and high security,with a key space being up to 255×10120.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第5期27-33,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(60802004)
中央高校基本科研业务费专项资金资助项目(2009ZM0011)
关键词
混沌系统
加密
辅助密钥
置乱
chaotic systems
encryption
auxiliary key
order-disorder
