Design And Research Of Information Steganography Algorithm Based On Energy Weight

With the rapid development of computer network, the information transmission is more likely convenient. Meanwhile, the convenience also brings new challenges to information security. Cryptography, security channel and steganography are three typical security communication approaches, while the steganography is much better than the other methods in invisibility and cost. In this paper, the performance parameters are taken as the measurable indicators, and digital image and 3D mesh will mainly be the carriers. And consequently,several information steganography algorithms based on energy weight will be structured and illustrated.Research on steganography mainly concentrates on hiding area and the design of specific embedding rules. Therefore, this paper will firstly study on hiding area and information embedding rules, and secondly analyze on the performance measurable indicators for information steganography algorithms. Consequently, two kinds of information steganography algorithms will be proposed.(1) Steganography algorithm based on lαβannulus analysis in spatial domain. First, the digital image will be divided into l, α and βcomponents in gray-scale forms. Second, α and β components will be taken as the main carrier regions because of their large redundancy and lower influence on visual effect, and then these two components will be partitioned into sub-areas according to the annulus equality.Last, the confidential information will be hidden by modification the pixel values in corresponding gray-scale annulus areas of α and β components. Focusing on the relevance between the weights of l, α and β and the performance of this algorithm, in an annular region of central symmetry implicit write the same secret information, especially of rotary shear attack and has strong robustness, by changing the ring number and area to increase or decrease the quantity of information embedded. Experiments show that the algorithm has good resistance to rotation and shearing resistance.(2) Steganography algorithm based on 3D profile analysis. First, according to the energy and structural characteristics of the local heightdescriptor for 3D model vertices. Second, the mean shift clustering analysis is used to classify each vertex according to the local height values as the energy characteristics of different categories. By modifying the structure characteristic of three kinds of vertices, the embedding of different information is realized by modifying the structure characteristic of the three kinds of vertices. Experimental results show that the performance of the algorithm is balanced, in particular, it has better anti-analysis and perceptual tampering ability, and the capacity is obviously improved.In this paper, we mainly study on the hiding region and the embedding rule, and propose two new algorithms. The study in this dissertation is expected to help people in design and analysis of steganography models. The algorithms proposed here are useful to improve the integrity and visibility of the confidential information extracted from the carrier which has been attacked(such as rotating and cropping). And the imperceptibility and security are both satisfied.