基于量子和时空混沌的图像加密方案  

A novel image encryption scheme using quantum and spatiotemporal chaos

作　　者：温贺平 张崇富 张智 WEN Heping;ZHANG Chongfu;ZHANG Zhi(School of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China;School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China)

机构地区：[1]电子科技大学中山学院电子信息学院,广东中山528402 [2]电子科技大学信息与通信工程学院,四川成都611731

出　　处：《合肥工业大学学报（自然科学版）》2020年第6期777-783,共7页Journal of Hefei University of Technology：Natural Science

基　　金：广东省教育厅青年创新人才自然科学基金资助项目(2019KQNCX191);广东高校创新团队资助项目(2018KCXTD033);中山市社会公益科技研究资助项目(2019B2007);电子科技大学中山学院高层次人才科研启动基金资助项目(419YKQN23,418YKQN07)。

摘　　要：对现有混沌图像加密安全性不足的问题,利用量子混沌映射和时空混沌系统的复杂特性,文章提出了一个新型图像加密方案。为提高抵御密码攻击的能力,该文所提方案采取了明文关联生成混沌密钥序列以及密文反馈扩散加密的安全机制。首先将量子Logistic混沌序列对明文图像进行正向密文反馈扩散加密;然后根据改进的耦合格子时空混沌系统生成的密钥序列对扩散图像进行双重置换;最后再次利用量子混沌序列对置换图像进行反向密文反馈扩散加密。理论分析和实验结果表明,加密方案具有密钥空间大、对明文和密钥敏感及信息熵大等特性,能够抵御各种常见的密码攻击。In this paper,a novel image encryption scheme using quantum Logistic and spatiotemporal chaotic maps is proposed to enhance the security of chaotic image encryption.To improve the ability for resisting cryptographic attacks,security mechanisms with generating chaos-based key sequences in plaintext association and diffusion encryption of ciphertext feedback are adopted.First,a quantum Logistic chaotic sequence is used for forward diffusion encryption of a plain image.Next,the key sequences generated by an improved coupled map lattice are used to scramble the diffused image twice.Finally,another quantum chaos-based key sequence is adopted in reverse ciphertext feedback diffusion encryption.Theoretical analysis and experimental results demonstrate that the proposed scheme has large key space and large information entropy and is sensitive to plain images and secret keys,which can resist various common cryptographic attacks.

关 键 词：量子混沌 图像加密 耦合映像格子 混沌保密通信 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置] TN918.4[自动化与计算机技术—控制科学与工程]