DU Xinchang,GAO Yuxiang.Multi-image Hiding Encryption Algorithm based on Chaotic Compressed Sensing[J].Journal of Chengdu University of Information Technology,2022,37(05):558-564.[doi:10.16836/j.cnki.jcuit.2022.05.012]
基于混沌压缩感知的多图像隐藏加密算法
- Title:
- Multi-image Hiding Encryption Algorithm based on Chaotic Compressed Sensing
- 文章编号:
- 2096-1618(2022)05-0558-07
- Keywords:
- compression perception; chaos; more images; hide the encryption
- 分类号:
- TN911.73
- 文献标志码:
- A
- 摘要:
- 针对现有的图像加密算法大多只对单幅图像单次操作，加密后的密文图像在传递过程中占据较大的带宽，且密文图像特有的纹理特征容易被特定识别截取等问题，提出了一种基于混沌压缩感知的多图像压缩隐藏加密算法。该算法通过结合压缩感知技术将多幅图像同时隐藏加密于一幅明文载体图像中，并提出一种新的组合置乱算法。对压缩后的密文图像进行加权、置乱、扩散操作得到最终的密文图像，将密文图像隐藏嵌入明文覆盖图像中进行传递。仿真实验表明，合并压缩加密4幅图像的情况下，可节省超过81.5%的存储空间，且平均每幅复原图像的峰值信噪比达到27.71 dB。并且该算法有较好的抗差分攻击性能，密文图像像素改变率(UACI)与统一平均变化程度(NPCR)接近理论值。故提出的压缩加密隐藏算法具有较好的压缩性、安全性。
- Abstract:
- Most of the existing image encryption algorithms only operate on a single image once, the encrypted ciphertext image still occupies a large bandwidth in the process of transmission, and the unique texture features of the ciphertext image are easy to be intercepted by specific recognition, etc. This paper proposes a multi-image compression and concealment encryption algorithm based on chaotic compressed sensing. In this algorithm, multiple images are simultaneously hidden and encrypted in a plaintext carrier image by combining compressed sensing technology. A new combinatorial scrambling algorithm is proposed. The compressed ciphertext image is weighted, scrambled and diffused to get the final ciphertext image, and the ciphertext image is hidden and embedded in the plaintext overlay image for transmission. Simulation results show that the combined compression and encryption of four images can save more than 81.5% of the storage space, and the average peak signal-to-noise ratio of each restored image reaches27.71 dB.Moreover,the algorithm has a good anti-differential attack performance, and the pixel change rate(UACI)and uniform mean change degree(NPCR)of ciphertext images are close to the theoretical values. Therefore, the compression encryption and hiding algorithm proposed in this paper has good compressibility and security.
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备注/Memo
收稿日期:2021-12-01
基金项目:四川省教育厅资助项目(15TD0022)