摘要
提出了一种结合多个Logistic混沌映射和逐段正弦混沌映射的图像加密算法。通过m个Logistic混沌映射的多次迭代,分别产生m个分段正弦混沌映射的初值和参数值,由m个分段正弦混沌映射迭代产生图像加密密钥序列,并引入密文输出反馈机制,对图像像素值逐点进行2轮异或加密。实验表明,该算法使密文对明文和密钥都充分敏感,加密图像像素值具有类随机均匀分布特性,相邻像素具有零相关特性,而且算法具有密钥空间大、加密速度快的优越性。
A new chaotic image encryption algorithm based on multi logistic maps（LMs） and piecewise sine chaotic maps（PSCMs） is proposed.The initial values and system parameters of the m PSCMs are generated by four LMs via iteration.By using the m-PSCMs chaotic secret key stream are generated.The image is encrypted two rounds by the chaotic secret key stream pixel by pixel and ciphertext output-feedback technology is introduced.The experimental results demonstrate that the extremely sensitive to the key and the plaintext,the ciphered image has random-like distribution behavior of grey values,the adjacent pixels have zero co-correlation properties.Furthermore,the algorithm shows the advantages of large key space and high speed of encryption.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2010年第5期528-531,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(60902044)
中南大学首批研究生培养扶植基金资助项目(71333000482)
