基于四维混沌系统的彩色图像加密算法

Colour Image Encryption Algorithm Based on 4D Chaotic System

图像加密算法研究在确保图像信息安全方面至关重要,图像中包含的信息量较大,相邻像素间存在较强的关联性,在传输过程中容易造成信息泄露。为了打破图像相邻像素间较强的关联性以及提高抗攻击性,提出了基于四维混沌系统DNA编码的彩色图像加密算法。采用四维混沌系统模型产生混沌序列,利用产生的混沌序列和DNA编码等方法对加密图像进行置乱处理,最后对图像加密效果和抗攻击性能进行对比验证。仿真结果表明,通过该算法对图像加密后,相邻像素间的关联性大大削弱。相较于对比算法,该算法能够对彩色明文图像进行有效的加密,同时算法具备抵御干扰和攻击的能力,显著提高了图像的安全性,在彩色图像加密领域具有一定的发展前景。

The research on image encryption algorithms is crucial in ensuring image information security.Images contain a large amount of information,and there is strong correlation between adjacent pixels,which can easily cause information leakage during transmission.In order to break the strong correlation between adjacent pixels in images and improve their resistance to attacks,a color image encryption algorithm based on 4D chaotic system DNA encoding is proposed.It uses a 4D chaotic system model to generate chaotic sequences,the encrypted images are scrambled using the generated chaotic sequences and DNA encoding methods.Finally,the image encryption effect and anti-attack capability are compared and verified.The simulation results show that after encrypting the image by using this algorithm,the correlation between adjacent pixels is greatly weakened.Compared to comparative algorithms,this algorithm can effectively encrypt color plaintext images,and has the ability to resist interference and attacks,significantly improving the security of images.It has certain development prospects in the field of color image encryption.