J4 ›› 2015, Vol. 37 ›› Issue (10): 1933-1939.
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涂正武,金聪
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TU Zhengwu,JIN Cong
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摘要:
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。
关键词: DNA序列, 位平面, 图像加密, Chen超混沌
Abstract:
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 bitplanes.We firstly decompose a color image into bitplanes and encode the them by DNA sequence.Likewise,we perform scrambling,addition and xor operations on every DNA-plane.Then,we decode the DNAplanse and compose the bitplanes into an encrypted image.Experimental results show that the encrypted image is noiselike,highly sensitive to the keys, has a flat histogram,good randomness and low correlation between two adjacent pixels.
Key words: DNA sequence;bitplane;image encryption;Chen’s chaos
涂正武,金聪. 基于DNA序列的彩色图像加密算法[J]. J4, 2015, 37(10): 1933-1939.
TU Zhengwu,JIN Cong. A color image encryption algorithm based on DNA sequence [J]. J4, 2015, 37(10): 1933-1939.
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http://joces.nudt.edu.cn/CN/Y2015/V37/I10/1933