A new color image encryption scheme based on DNA encoding and spatiotemporal chaotic system
A new color image encryption scheme based on DNA encoding and spatiotemporal chaotic system
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一种基于DNA编码和时空混沌系统的彩色图像加密新方案
DOI：
10.1016/j.image.2019.115670
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发表时间：
2020-02-01
影响因子：
3.5
通讯作者：
Guo Zihui
中科院分区：
文献类型：
--
作者：
Kang Xuejing;Guo Zihui
提出了一种新的基于DNA运算和时空混沌系统的彩色图像加密方案。首先，为了隐藏图像的分布信息，根据DNA随机编码规则，将图像转换为三个DNA矩阵。然后，将DNA矩阵组合成一个新的矩阵，并用线性-非线性混合耦合映射格子(MLNCML)系统产生的置乱矩阵进行置换。其中，密钥流与密钥和明文图像相关联，保证了密码系统对明文图像的依赖性，提高了密码系统抵抗已知明文或选择明文攻击的能力。之后，为了抵抗统计攻击，将置乱后的矩阵分解成三个矩阵，并通过DNA删除插入操作进行扩散。最后，根据DNA随机解码规则对这三个矩阵进行解码，并将其重组为三个通道的密码图像。仿真结果表明，所提出的图像密码系统具有良好的安全性，能够抵抗各种潜在的攻击。
In this paper, a new color image encryption scheme based on DNA operations and spatiotemporal chaotic system is presented. Firstly, to hide the distribution information of the plain image, we convert the plain image into three DNA matrices based on the DNA random encoding rules. Then, the DNA matrices are combined into a new matrix and is permutated by a scramble matrix generated by mixed linear-nonlinear coupled map lattices (MLNCML) system. In which, the key streams are associated with the secret keys and plain image, which can ensure our cryptosystem plain-image-dependent and improve the ability to resist known-plaintext or chosen-plaintext attacks. Thereafter, to resist statistical attacks, the scrambled matrix is decomposed into three matrices and diffused by DNA deletion-insertion operations. Finally, the three matrices are decoded based on DNA random decoding rules and recombined to three channels of the cipher image. Simulation results demonstrate that the proposed image cryptosystem has good security and can resist various potential attacks.