摘要
为进一步提高数字图像信息的安全性,采用二维Logistic系统与新二维离散系统相结合,提出一种能极大扩展密钥空间且增强安全性的图像加密方案。首先,对明文数字图像预处理,提取其R、G、B分量并将其转化为一维阵列,与由二维Logisticmap产生的伪随机混沌序列进行数学运算;之后,采用基于修正的Marotto定理的新二维离散混沌系统与相对应的一次密文异或的方法,得到三个一维数组;最后,转化为三维数组,得到最终密文图像。通过实验仿真结果得出,与传统的混沌加密算法相比,该算法具有易实现、对系统初始条件扰动敏感、密钥空间大等优点。
In order to further improve the security of digital image information,a two-dimensional Logistic system is combined with a new two-dimensional discrete system to propose an image encryption scheme that can greatly expand the key space and enhance security.Firstly,the plaintext digital image is preprocessed,and R,G,and B components are extracted and converted into a one-dimensional array,and the pseudo-random chaotic sequence generated by the two-dimensional Logistic map is mathematically operated.Secondly,using the new two-dimensional discrete chaotic system based on the modified Marotto theorem and the corresponding one-time ciphertext XOR,get three one-dimensional arrays.Finally,convert to a three-dimensional array to get the final ciphertext image.The experimental results show that compared with the traditional chaotic encryption algorithm,it has the advantages of easy implementation,sensitivity to initial conditional disturbance,and large key space.
作者
李静
向菲
张军朋
LI Jing;XIANG Fei;ZHANG Jun-peng(Electrical Engineering Colleg,Henan University of Science and Technology,Luoyang 471023,China)
出处
《电子设计工程》
2019年第12期84-88,共5页
Electronic Design Engineering
基金
国家自然科学基金(61772174)
河南省科技创新杰出人才计划项目(174200510011)
