基于混沌映射和DNA编码的图像加密方法研究
发布时间：2019-03-03 15:11
【摘要】：混沌密码和DNA密码作为密码学的两个新的领域,一直得到众多专家、学者的高度关注。两者在图像加密中的应用更是成为了密码学研究中的新的趋势。随着图像数据的急速增长,图像数据安全处理成为了亟待解决的网络安全新挑战。图像加密是密码学、信息安全、图像处理、可视计算的交叉方向也是瞄准科学研究国际前沿的新研究方向。其关键难点在于:如何利用适合图像加密的、新兴的密码学方法,实现复杂度低、安全有效的图像加密。1.本论文结合两个新的密码学领域,深入开展基于DNA编码与混沌映射的灰度图像和彩色图像加密方法研究。重点研究关于面向图像加密方法的混沌映射的特性,应用在图像加密方法中的DNA编码的特性;以及基于混沌映射和DNA编码的灰度图像加密方法和彩色图像加密方法;最后是有关图像加密方法安全性的分析与测试等方面的内容。2.文章中首先对现有算法做了相关分析,并得出结论:单独的使用混沌映射或者DNA编码并非是图像加密的最好的解决办法,而将两者结合起来是图像加密发展的有利的方向之一。文章中着重的分析了一个基于两者的图像加密方法,并且发现其存在着致命的问题:加密方法不可逆。本文正是针对这一关键问题展开研究。在研究过程中,提出了一种针对灰度图像加密的方法,并将灰度图像加密方法思路应用到彩色图像加密方法中。本文还对这两种加密思路进行了相关的性能分析。3.为了对本文的图像加密方法做出更进一步的研究,文中用例图分别给出了其原始图像与秘密图像的对比。并进一步的利用图像加密中常用的性能测试手段对该方法进行了相关的测试,其中包括:密钥空间分析,抗差分攻击分析,相关性分析等。4.本文中提出的图像加密方法不仅解决了原始方案的可逆性,而且还将混沌映射的特性和DNA编码的特性紧密结合起来,并将其应用到彩色图像加密方法中。最重要的是,经过相关测试,其拥有较高的安全性和有效性。本文的内容也许会促进生物学领域和密码学领域的研究不断发展和有机交叉。研究成果将在政府、军事、医疗、商业、个人系统等诸多领域的机要与隐私保护方面具有广泛应用前景。
[Abstract]:Chaotic cryptography and DNA cryptography, as two new fields of cryptography, have been paid close attention to by many experts and scholars. The application of both in image encryption has become a new trend in cryptography research. With the rapid growth of image data, image data security processing has become a new challenge to network security. Image encryption is the crossing direction of cryptography, information security, image processing and visual computing. It is also a new research direction aiming at the international frontier of scientific research. The key difficulty lies in how to make use of the new cryptology method suitable for image encryption to realize the low complexity, safe and effective image encryption. In this paper, combining with two new cryptography fields, the gray-scale image and color image encryption method based on DNA coding and chaotic mapping is studied deeply. This paper focuses on the characteristics of chaotic mapping for image encryption, the characteristics of DNA coding applied in image encryption, gray-scale image encryption and color image encryption based on chaotic mapping and DNA coding. Finally, the analysis and test of the security of image encryption methods are given. 2. In this paper, we first analyze the existing algorithms, and draw a conclusion that using chaotic mapping or DNA coding alone is not the best solution for image encryption, and combining them is one of the advantageous directions for image encryption development. This paper focuses on the analysis of an image encryption method based on the two methods, and finds that there is a fatal problem: the encryption method is irreversible. This paper is aimed at this key problem to carry on the research. In the process of research, a method of gray-scale image encryption is proposed, and the idea of gray-scale image encryption method is applied to color image encryption method. The performance analysis of these two encryption ideas is also given in this paper. 3. In order to make further research on the image encryption method in this paper, the comparison between the original image and the secret image is given in the use case diagram. Furthermore, the performance testing methods used in image encryption are used to test this method, including key space analysis, differential attack analysis, correlation analysis, and so on. 4. The key space analysis, anti-differential attack analysis, correlation analysis and so on are used to test the performance of this method. The image encryption method proposed in this paper not only solves the reversibility of the original scheme, but also closely combines the characteristics of chaotic mapping and DNA coding, and applies it to the color image encryption method. Most importantly, after related tests, it has high security and effectiveness. The content of this paper may promote the continuous development and organic intersection of biology and cryptography. The research results will be widely used in many fields, such as government, military, medical, commercial, personal system, and privacy protection.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN918.4
本文编号：2433813
[Abstract]:Chaotic cryptography and DNA cryptography, as two new fields of cryptography, have been paid close attention to by many experts and scholars. The application of both in image encryption has become a new trend in cryptography research. With the rapid growth of image data, image data security processing has become a new challenge to network security. Image encryption is the crossing direction of cryptography, information security, image processing and visual computing. It is also a new research direction aiming at the international frontier of scientific research. The key difficulty lies in how to make use of the new cryptology method suitable for image encryption to realize the low complexity, safe and effective image encryption. In this paper, combining with two new cryptography fields, the gray-scale image and color image encryption method based on DNA coding and chaotic mapping is studied deeply. This paper focuses on the characteristics of chaotic mapping for image encryption, the characteristics of DNA coding applied in image encryption, gray-scale image encryption and color image encryption based on chaotic mapping and DNA coding. Finally, the analysis and test of the security of image encryption methods are given. 2. In this paper, we first analyze the existing algorithms, and draw a conclusion that using chaotic mapping or DNA coding alone is not the best solution for image encryption, and combining them is one of the advantageous directions for image encryption development. This paper focuses on the analysis of an image encryption method based on the two methods, and finds that there is a fatal problem: the encryption method is irreversible. This paper is aimed at this key problem to carry on the research. In the process of research, a method of gray-scale image encryption is proposed, and the idea of gray-scale image encryption method is applied to color image encryption method. The performance analysis of these two encryption ideas is also given in this paper. 3. In order to make further research on the image encryption method in this paper, the comparison between the original image and the secret image is given in the use case diagram. Furthermore, the performance testing methods used in image encryption are used to test this method, including key space analysis, differential attack analysis, correlation analysis, and so on. 4. The key space analysis, anti-differential attack analysis, correlation analysis and so on are used to test the performance of this method. The image encryption method proposed in this paper not only solves the reversibility of the original scheme, but also closely combines the characteristics of chaotic mapping and DNA coding, and applies it to the color image encryption method. Most importantly, after related tests, it has high security and effectiveness. The content of this paper may promote the continuous development and organic intersection of biology and cryptography. The research results will be widely used in many fields, such as government, military, medical, commercial, personal system, and privacy protection.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN918.4
【参考文献】
相关期刊论文 前2条
1 王兴元;石其江;;二维Logistic映射中的一种新型激变、回滞和分形[J];应用力学学报;2005年04期
2 范延军;孙燮华;阎晓东;郑林涛;;一种基于混合混沌序列的图像置乱加密算法[J];中国图象图形学报;2006年03期
，本文编号：2433813
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