戴婉莹,周勇,许向亮.基于新型多环多翼超混沌系统的图像加密算法[J].包装工程,2021,42(17):179-188.
DAI Wan-ying,ZHOU Yong,XU Xiang-liang.Image Encryption Algorithm Based on Novel Multi-Ring and Multi-Wing Hyperchaotic System[J].Packaging Engineering,2021,42(17):179-188. |
| 基于新型多环多翼超混沌系统的图像加密算法 |
| Image Encryption Algorithm Based on Novel Multi-Ring and Multi-Wing Hyperchaotic System |
| 投稿时间：2020-12-03 |
| DOI：10.19554/j.cnki.1001-3563.2021.17.024 |
| 中文关键词: 多环多翼超混沌系统 分形变换 索引置乱 扩散 图像加密 |
| 英文关键词: multi-ring and multi-wing hyperchaotic system fractal transform the index of scrambling diffusion image encryption |
| 基金项目:国家自然科学基金(71563046);新疆财经大学基金(XJUFE2020K011) |
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| 中文摘要: |
| 目的 为提高图像加密算法的安全性，提出一种新型多环多翼超混沌系统的图像加密算法。方法 对超Lorenz混沌系统进行分形变换，得到多环多翼超混沌系统，设计一种基于该混沌系统的查表运算扩散算法。算法采用典型的置乱-扩散模式，借助Logistic混沌系统对明文图像进行无重复索引置乱，将新型多环多翼超混沌系统产生的密钥序列结合明文信息，对一次扩散图像的每个像素值进行正逆向扩散，得到最终的加密图像。结果 置乱图像的平均不动点比为0.003%，密文直方图分布均匀，相邻像素相关性几乎为零，信息熵达到了7.999，且NPCR，UACI和BACI的值分别为99.61%，33.46%和26.7%，与同类加密算法相比，该算法加密效果更优。结论 算法具有较强的密钥敏感性，能有效抵抗剪切、噪声等攻击，所提出的图像加密算法具有较高的安全性。 |
| 英文摘要: |
| In order to improve the security of image encryption algorithm, a new image encryption algorithm of multi-ring and multi-wing hyperchaotic system is proposed. The multi-ring and multi-wing hyperchaotic system was obtained by the fractal transformation of super Lorenz chaotic system. A look-up table operation diffusion algorithm based on the chaotic system was designed. The algorithm adopted the typical scrambling diffusion mode, used the Logistic chaotic system to scramble the plaintext image without repeated index. The key sequence generated by the new multi-ring and multi-wing hyperchaotic system was combined with the plaintext information, and each pixel value of the once diffused image was diffused forward and backward to obtain the final encrypted image. The average fixed point ratio of scrambling image was approximately 0.003%, the histogram distribution of ciphertext was uniform, the correlation of adjacent pixels was almost zero, the information entropy was 7.999, and the values of NPCR, UACI and BACI were 99.61%, 33.46% and 26.7%, respectively. Compared with similar encryption algorithms, the encryption effect of this algorithm is better. The algorithm has strong key sensitivity, and can effectively resist the attacks of cutting and noise. The proposed image encryption algorithm has high security. |
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