Zhang Duzhong, Chen Lexing, Li Taiyong
School of Economic Information Engineering, Southwestern University of Finance and Economics, Chengdu 611130, China.
Entropy (Basel). 2021 Mar 17;23(3):361. doi: 10.3390/e23030361.
With increasing utilization of digital multimedia and the Internet, protection on this digital information from cracks has become a hot topic in the communication field. As a path for protecting digital visual information, image encryption plays a crucial role in modern society. In this paper, a novel six-dimensional (6D) hyper-chaotic encryption scheme with three-dimensional (3D) transformed Zigzag diffusion and RNA operation (HCZRNA) is proposed for color images. For this HCZRNA scheme, four phases are included. First, three pseudo-random matrices are generated from the 6D hyper-chaotic system. Second, plaintext color image would be permuted by using the first pseudo-random matrix to convert to an initial cipher image. Third, the initial cipher image is placed on cube for 3D transformed Zigzag diffusion using the second pseudo-random matrix. Finally, the diffused image is converted to RNA codons array and updated through RNA codons tables, which are generated by codons and the third pseudo-random matrix. After four phases, a cipher image is obtained, and the experimental results show that HCZRNA has high resistance against well-known attacks and it is superior to other schemes.
随着数字多媒体和互联网的使用日益增加，保护这种数字信息不被破解已成为通信领域的一个热门话题。作为保护数字视觉信息的一种途径，图像加密在现代社会中起着至关重要的作用。本文针对彩色图像提出了一种新颖的具有三维变换之字形扩散和RNA操作的六维超混沌加密方案（HCZRNA）。对于该HCZRNA方案，包括四个阶段。首先，从六维超混沌系统生成三个伪随机矩阵。其次，利用第一个伪随机矩阵对明文彩色图像进行置乱，转换为初始密文图像。第三，使用第二个伪随机矩阵将初始密文图像放置在立方体上进行三维变换之字形扩散。最后，将扩散后的图像转换为RNA密码子阵列，并通过由密码子和第三个伪随机矩阵生成的RNA密码子表进行更新。经过四个阶段后，得到密文图像，实验结果表明HCZRNA对已知攻击具有高抗性，且优于其他方案。
