基于DNA序列的彩色图像加密算法

结合混沌系统和DNA密码学,提出了一种基于DNA序列的彩色图像加密算法。该算法应用了DNA序列的加法、减法、异或运算,并且把彩色图像分解为位平面进行处理。首先对彩色图像位平面分解、DNA编码;然后对DNA平面置乱、DNA加法运算、DNA异或运算;最后进行DNA解码、位平面合并,得到密文图像。实验结果表明,原始图像加密后的图像类似噪声,加密后的直方图变得更平滑,对密钥有很高的敏感性,密文图像的随机性好,密文图像相邻像素之间相关性低。

A color image encryption algorithm based on DNA sequence

Combining DNA cryptography with chaotic system,we present a color image encryption algorithm based on DNA sequence. This algorithm applies addition,subtraction and xor operations to DNA sequence,and decomposes a color image into bit planes.We firstly decompose a color image into bit planes and encode the them by DNA sequence.Likewise,we perform scrambling,addition and xor operations on every DNA-plane.Then,we decode the DNA planse and compose the bit planes into an encrypted image.Experimental results show that the encrypted image is noise like,highly sensitive to the keys, has a flat histogram,good randomness and low correlation between two adjacent pixels.