CHU Chunyang,GAO Yuxiang,XIE Jianfeng.A Fast Image Encryption Method based on Generalized logistic Chaotic System[J].Journal of Chengdu University of Information Technology,2021,36(02):149-153.[doi:10.16836/j.cnki.jcuit.2021.02.004]
基于广义logistic混沌系统的快速图像加密方法
- Title:
- A Fast Image Encryption Method based on Generalized logistic Chaotic System
- 文章编号:
- 2096-1618(2021)02-0149-05
- 关键词:
- 混沌加密系统; 广义logistic; 低复杂度; 实时性
- 分类号:
- TN911.73
- 文献标志码:
- A
- 摘要:
- 针对混沌加密系统的计算复杂与时耗高达1 s以上等问题,基于广义logistic混沌提出了一种快速的低复杂度的图像加密方法。该方法摒弃了复杂的多维混沌系统,利用广义logistic混沌序列进行图像的置乱、改进预处理操作,并应用特定的密钥方程代替烦琐的加密流程进行加密变换预处理后的图像。仿真实验表明,该算法降低了冗余度,提高了效率,实现了快速加密图像的目的。平均加、解密时间分别为0.231 s和0.022 s,是同等条件下ElGamal加密算法速率的5倍,能够满足加密的快速性、实时性要求,且能够抵抗多种攻击,具有安全性高、复杂性与时耗低等特点。
- Abstract:
- To solve the problems of chaotic encryption system, such as high computational complexity and time consumption up to more than 1s, a fast and low-complexity image encryption method based on generalized logistic chaos was proposed. In this method, the complex multidimensional chaotic system is abandoned, and the image is scrambled and preprocessed with the generalized logistic chaotic sequence, and the specific key equation is used instead of the cumbersome encryption process to encrypt and transform the preprocessed image. Simulation results show that the algorithm reduces redundancy, improves efficiency and achieves fast image encryption. The average encryption and decryption time are 0.231 s and 0.022 s respectively, which is 5 times of the speed of ElGamal encryption algorithm under the same conditions. It can meet the requirements of fast and real-time encryption, and can resist a variety of attacks, and is with high security, complexity and low time consumption.
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备注/Memo
收稿日期:2020-09-08
基金项目:四川省教育厅高校创新团队资助项目(15TD0022)