基于非线性科学的数字混沌理论在计算机设计图像加密中的研究
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摘要
提出了一种用于图像加密的基于非线性科学的数字混沌理论算法。利用外部密钥的映射生成对应的加密系统初始参数,然后利用图像的大小生成大量的密钥流。本文算法引入了密文反馈机制,这样加密算法对明文以及密钥的敏感性得到了提高。依所安全性的等级可以对加密轮数进行调节。实验表明,本文的算法对密钥以及明文有着非常高的敏感度,并且具有较好的统计表现,在算法的运行上,有较高的运算效率。这种效果是由于本文的算法引入了反馈机制,使得加密算法算到改进,提高抵御攻击的能力,使系统的安全性得到提升。
This paper presents a digital chaos theory algorithm based on nonlinear science for image encryption. The mapping of external key is used to generate the corresponding initial parameters of the encryption system,and then the size of image is used to generate a large number of key streams. In this paper,the ciphertext feedback mechanism is introduced to improve the sensitivity of encryption algorithm to plaintext and key. The number of encryption rounds can be adjusted according to the level of security.Experiments show that the algorithm in this paper has a very high sensitivity to key and plaintext,and has a good statistical performance,in the operation of the algorithm,has a high operational efficiency. This effect is due to the introduction of feedback mechanism in the algorithm in this paper,which improves the encryption algorithm,improves the ability to resist attacks,and improves the security of the system.
This paper presents a digital chaos theory algorithm based on nonlinear science for image encryption. The mapping of external key is used to generate the corresponding initial parameters of the encryption system,and then the size of image is used to generate a large number of key streams. In this paper,the ciphertext feedback mechanism is introduced to improve the sensitivity of encryption algorithm to plaintext and key. The number of encryption rounds can be adjusted according to the level of security.Experiments show that the algorithm in this paper has a very high sensitivity to key and plaintext,and has a good statistical performance,in the operation of the algorithm,has a high operational efficiency. This effect is due to the introduction of feedback mechanism in the algorithm in this paper,which improves the encryption algorithm,improves the ability to resist attacks,and improves the security of the system.
引文
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[3] Hu H,Deng Y,Liu L. Counteracting the dynamical degradation of digital chaos via hybrid control[J].Communications in Nonlinear Science and Numerical Simulation,2014,19(6):1970-1984.
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[5] Rehman A U,Liao X,Ashraf R,et al. A Color Image Encryption Technique using Exclusive-OR with DNA Complementary Rules based on Chaos Theory and SHA-2[J]. Optik,2018,159:348-367.
[6] Babaei M. A novel text and image encryption method based on chaos theory and DNA computing[J]. Natural Computing,2013,12(1):101-107.
[2] Wang Q,Ding Q,Zhang Z,et al.[IEEE 2008 Fourth International Conference on Natural ComputationJinan,Shandong,China(2008. 10. 18-2008. 10. 20)]2008 Fourth International Conference on Natural Computation-Digital Image Encryption Research Based on DWT and Chaos[J]. 2008:494-498.
[3] Hu H,Deng Y,Liu L. Counteracting the dynamical degradation of digital chaos via hybrid control[J].Communications in Nonlinear Science and Numerical Simulation,2014,19(6):1970-1984.
[4] De W. Image encryption arithmetic based on S-boxes scrambling and Chaos theory[J]. Computer Engineering and Applications,2008,44(19):50-53.
[5] Rehman A U,Liao X,Ashraf R,et al. A Color Image Encryption Technique using Exclusive-OR with DNA Complementary Rules based on Chaos Theory and SHA-2[J]. Optik,2018,159:348-367.
[6] Babaei M. A novel text and image encryption method based on chaos theory and DNA computing[J]. Natural Computing,2013,12(1):101-107.