This paper presents a novel and robust chaos-based cryptosystem for secure transmitted images and four other versions. In the proposed block encryption/decryption algorithm, a 2D chaotic map is used to shuffle the image pixel positions. Then, substitution (confusion) and permutation (diffusion) operations on every block, with multiple rounds, are combined using two perturbed chaotic PWLCM maps. The perturbing orbit technique improves the statistical properties of encrypted images. The obtained error propagation in various standard cipher block modes demonstrates that the proposed cryptosystem is suitable to transmit cipher data over a corrupted digital channel. Finally, to quantify the security level of the proposed cryptosystem, many tests are performed and experimental results show that the suggested cryptosystem has a high security level.

中文翻译：

---

一种用于安全传输图像的新的基于混沌的密码系统

本文提出了一种新颖且稳健的基于混沌的密码系统，用于安全传输图像和其他四个版本。在提出的块加密/解密算法中，使用 2D 混沌图来打乱图像像素位置。然后，使用两个扰动混沌 PWLCM 映射组合对每个块进行多轮替换（混淆）和置换（扩散）操作。扰动轨道技术改善了加密图像的统计特性。在各种标准密码块模式中获得的错误传播表明，所提出的密码系统适用于在损坏的数字通道上传输密码数据。最后，为了量化所提出的密码系统的安全级别，进行了许多测试，实验结果表明所建议的密码系统具有较高的安全级别。