加密域可逆信息隐藏研究

发布时间：2018-07-04 14:10

本文选题：加密技术 + 可逆信息隐藏　；参考：《暨南大学》2014年硕士论文

【摘要】：加密域可逆信息隐藏是一种能在加密后的多媒体数据中执行可逆信息隐藏的技术，，其兼具加密技术与可逆信息隐藏的优点，同时又有别于传统的加密与可逆信息隐藏相结合的技术，其以优越的性能在信息安全领域扮演着不可替代的作用。本文对加密域可逆信息隐藏进行了研究。首先，对加密域可逆信息隐藏的理论进行了研究。描述了其研究背景、应用领域、国内外研究现状；同时，由于加密域可逆信息隐藏是与加密技术和信息隐藏紧密相关联的，因此本文还对加密技术、信息隐藏尤其是可逆信息隐藏的知识进行了综述，分析比较了几种常用的算法。其次，对加密域可逆信息隐藏的算法进行了研究，算法的研究是以多媒体中具有代表性的数字图像作为测试对象的。构建了加密域可逆信息隐藏的一般模型；在对两种经典的加密域可逆信息隐藏算法的不足之处进行分析的基础上，提出了一种基于图像块分类的加密域可逆信息隐藏算法。算法通过原始图像的高比特位的相关性对原始图像块进行平滑度分类，以执行不同数量的低比特位取反，从而达到有效减小数据提取和图像恢复的错误率的目的。实验结果表明，相对于之前的两种经典算法，新的算法在保证载体明文的安全性、解密图像的峰值信噪比不变的情况下，实现了上述目标，因此其具有更加优越的性能。最后，对本文提出的算法进行了总结分析，描述了其在性能上可进一步改进的地方，指出了下一步研究工作的方向，并对加密域可逆信息隐藏的前景进行了展望。
[Abstract]:Reversible information hiding in encryption domain is a kind of reversible information hiding technology which can be implemented in encrypted multimedia data. It has the advantages of both encryption and reversible information hiding. At the same time, different from the traditional encryption and reversible information hiding technology, its superior performance in the field of information security plays an irreplaceable role. In this paper, reversible information hiding in encryption domain is studied. Firstly, the theory of reversible information hiding in encryption domain is studied. At the same time, because the reversible information hiding in the encryption domain is closely related to the encryption technology and information hiding, this paper also discusses the encryption technology. The knowledge of information hiding, especially reversible information hiding, is reviewed, and several common algorithms are analyzed and compared. Secondly, the reversible information hiding algorithm in encryption domain is studied. The representative digital image in multimedia is used as the test object. A general model of reversible information hiding in encryption domain is constructed, and a reversible information hiding algorithm in encryption domain based on image block classification is proposed based on the analysis of the shortcomings of two classical reversible information hiding algorithms in encryption domain. The algorithm classifies the original image block smoothness by the correlation of high bit bits of the original image, in order to carry out different numbers of low bit bits inversion, so as to effectively reduce the error rate of data extraction and image recovery. The experimental results show that compared with the previous two classical algorithms, the new algorithm achieves the above objectives under the condition of guaranteeing the security of the carrier plaintext and keeping the peak signal-to-noise ratio of the decrypted image unchanged, so it has more superior performance. Finally, this paper summarizes and analyzes the proposed algorithm, describes the performance of the algorithm can be further improved, points out the direction of the next research work, and prospects for reversible information hiding in encryption domain.
【学位授予单位】：暨南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN918.4

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