Yang Bin
School of Computer and Software, Chengdu Jincheng College, Chengdu, China.
PLoS One. 2025 Jun 12;20(6):e0325197. doi: 10.1371/journal.pone.0325197. eCollection 2025.
As an efficient technique to protect image content from unauthorized access, image encryption has been a hot spot in recent studies. Among various schemes of image encryption, those that utilize hyperchaotic systems and deoxyribonucleicacid (DNA) computing are promising. In this paper, complementary rules of eight-base DNA computing are proposed, whose number is 5040, whereas the number of complementary rules of traditional four-base DNA is only 6. Hence, complementary rules of eight-base DNA can introduce larger flexibility and complexity into image encryption. In addition, a new extended Zigzag transform is proposed, which can generate a large number of Zigzag-like paths. By combining a four-dimensional (4D) hyperchaotic system, complementary rules of eight-base DNA and the new extended Zigzag transform, a new hyperchaotic encryption scheme for color images called EDCREZT is proposed. During the encryption procedure of EDCREZT, a plaintext color image will pass through five steps: pixel-level permutation, dynamic DNA encoding, DNA-level permutation by the new extended Zigzag transform, two-round DNA-level diffusion by the proposed complementary rules, and dynamic DNA decoding, then the cipher image is obtained. Extensive experiments have been conducted, and the results show EDCREZT possesses satisfying capability against typical attacks.
作为一种保护图像内容免遭未经授权访问的有效技术，图像加密一直是近年来研究的热点。在各种图像加密方案中，利用超混沌系统和脱氧核糖核酸（DNA）计算的方案很有前景。本文提出了八碱基DNA计算的互补规则，其数量为5040，而传统四碱基DNA的互补规则数量仅为6。因此，八碱基DNA的互补规则可以为图像加密引入更大的灵活性和复杂性。此外，还提出了一种新的扩展之字形变换，它可以生成大量类似之字形的路径。通过结合四维（4D）超混沌系统、八碱基DNA的互补规则和新的扩展之字形变换，提出了一种新的彩色图像超混沌加密方案，称为EDCREZT。在EDCREZT的加密过程中，一幅明文彩色图像将经过五个步骤：像素级置换、动态DNA编码、通过新的扩展之字形变换进行DNA级置换、通过所提出的互补规则进行两轮DNA级扩散以及动态DNA解码，然后得到密文图像。进行了大量实验，结果表明EDCREZT对典型攻击具有令人满意的抵抗能力。
