【摘要】 介绍一种二维Logistic混沌序列矩阵的生成方法,用其生成加密模板和治乱序列,讨论用其对图像的离散小波变换系数矩阵进行调整和置乱处理问题。仿真结果表明该混沌序列加解密算法扩展了密钥空间,密文均匀分布,能够克服低维混沌动力学系统易于攻击的缺陷,抵抗选择明文攻击,具有密图文件保密性高,密钥简单,重构图像与原图像一致性良好等特点,并且能够经受住传输过程中噪声的影响。更多还原

【Abstract】 Firstly a kind of the method of generating two-dimension Logistic chaotic sequences is introduced in the paper.It uses the chaotic sequences generate cryptograph template and scrambling sequences.The problem of adjusting and scrambling the discrete wavelet transform coefficient matrix of an image using cryptograph template and scrambling sequences is presented.Conclusion from experiment proves that the method expanded the cryptograph space,the property of cryptograph is uniform distribution.The algorithm overcomes low dimensional chaotic prone to be defected and has excellent anti-broken strength for chosen plain texts ability.The encryption method has advantages in high secrecy,simple secret key and good identity between the original image and the restored image.Moreover,during the transmission,the algorithm can go through the effects of noise.更多还原