基于比特平面分解的图像加密算法  

Image encryption algorithm based on bit-plane decomposition

作　　者：熊继伟 吴秋新[1] XIONG Jiwei;WU Qiuxin(School of Applied Science,Beijing Information Science&Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学理学院,北京100192

出　　处：《北京信息科技大学学报（自然科学版）》2021年第2期94-98,共5页Journal of Beijing Information Science and Technology University

摘　　要：针对现有的常用图像加密算法使用的置乱方式只适用于等长的图像问题,提出一种新的加密算法,使其能够在不产生冗余数据的前提下加密任意尺寸图像,并且拥有较好的性能。该算法使用单峰映射(logistic映射)产生混沌序列,并分解图像的比特平面,将不同的比特平面使用不同的方式置乱。实验结果表明,新算法具有较高的明文敏感性和密钥敏感性。加密之后的密文图像像素分布均匀,像素之间的相关性低,能够很好地抵抗选择明文攻击、统计分析等常见攻击。For now,the scrambling method used by many image encryption algorithms can only be applied to equal length images.To solve this problem,a new encryption algorithm is proposed,which encrypts any size images without generating redundant data and shows good performance.The algorithm uses logistic mapping to generate chaotic sequences,decomposes the bit plane of the image,and scrambles different bit planes in different ways.Experimental results show that the new algorithm has high plaintext sensitivity and key sensitivity.The encrypted ciphertext image pixels are evenly distributed and the correlation between pixels is low,which can resist the attack methods such as plaintext attacks and statistical analysis.

关 键 词：图像加密 置乱算法 混沌 分解比特平面 

分 类 号：TN915.6[电子电信—通信与信息系统]