摘要
针对基于混沌的图像加密算法无法抵御强力选择或已知明文攻击的问题,提出一种结合图像总体特征与混沌算法的RGB图像加密算法。首先,提取明文图像的特征并融合混沌映射的序列生成加密程序的伪随机序列;然后,使用128比特的对称秘钥计算逻辑映射的起始条件与控制参数,以此避免低维混沌系统产生较小的空间秘钥;最终,使用基于混沌映射的对称加密算法对一维混沌映射的分布进行优化。实验结果显示,该方法在保持混沌加密算法已有优点的前提下,可抵御强力的选择与已知明文攻击,并具有较快的加密速度。
Aimed at the problem that chaotic based image encryption algorithm can not defense hard choose or known plain image attack, a RGB image encryption algorithm combined total characters with chaotic algorithm is proposed. Firstly, the characters of plain images are abstracted combined with logistic map generating sequences are used to generate encrypted pseudorandom sequences; then, 128 bits long symmetric key is used to compute the initialization condition and control parameters of logistic mapping to avoid the small key space generated by the low dimensional chaotic system; lastly, logistic mapping based encryption algorithm is used to optimize the distribution of logistic mapping. Experimental results show that the proposed method can defense hard choose and known plain image attack in the premise of keeping the existing advantages of chaotic encryption algorithm, and has better computational efficiency.
作者
毕晓东
杨柏林
BI Xiao-dong;Yang Bo-lin(Institute of Digital Information, Zhejiang Technical Institute of Economics, Hangzhou 310018, China;College of Computer and Information Engineering, Zhejiang Gongshang University, Hangzhou 310023, China)
出处
《控制工程》
CSCD
北大核心
2018年第5期855-862,共8页
Control Engineering of China
基金
国家自然科学基金(61170214)
关键词
图像加密
信息安全
彩色图像
混沌算法
混沌映射
明文攻击
Image encryption
information security
color image
chaotic algorithm
logistic map
plain image attack
