基于Arnold分层循环变换的数字图像加密算法  

Digital image encryption algorithm based on Arnold hierarchical cyclic transform

作　　者：谢国波[1] 苏本卉 XIE Guo-bo SU Ben-hui(College of Computer, Guangdong University of Technology, Guangzhou 510006, China)

机构地区：[1]广东工业大学计算机学院,广东广州510006

出　　处：《计算机工程与设计》2017年第5期1200-1204,共5页Computer Engineering and Design

基　　金：广东省科技计划基金项目(2012B060500071;2013B022200004;2013B090600035);广东省自然科学基金项目(2014A030313512)

摘　　要：为克服Arnold变换的周期性的缺点,提出一种基于Arnold分层循环变换与混沌映射的数字图像加密算法。对图像从里到外不同范围的各层进行Arnold变换,使得层与层之间的置乱相互干扰,达到打乱Arnold周期性的目的;在对灰度值二进制分割循环移动后,根据账篷映射的公式,利用相邻的灰度值确定当前灰度值的变化,使得图像的变换和本身关联紧密。实验结果表明,该算法克服了Arnold变换的周期性缺点,对图像有良好的加密效果,能够抵御常见攻击。To overcome the shortcomings of the periodicity of Arnold hierarchical cyclic transform, a digital image based on Ar-nold hierarchical cyclictransform and Chaos map encryption algorithm was proposed. The image was scrambled by Arnold trans-form from the inside to the outside of every layer, the between layer and layer was arranged disorderly to achievemutual interfe-rence, and the cycle of Arnold was disrupted. After the segmentation movement cycles of gray value of binary, according to the formula of the tent map, the neighboring gray value was used to determine the changing of current gray value, making the image＇s transform associate with itself closely. Results of simulation show that this algorithm can overcome the periodicity of Arnold transform,and it has good encryption effects on the image, which also can resist the common attacks.

关 键 词：ARNOLD变换 账篷映射 混沌映射 周期性 加密 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]