Improving Anticompression Robustness of JPEG Adaptive Steganography Based on Robustness Measurement and DCT Block Selection

With the development of the Internet, social network platforms (SNPs) have become the most common channel for image sharing. As a result, transmitting stego images in the public channels gives steganographers the best opportunity to transmit secret messages with behavioral security preserved. However, the SNPs typically compress uploaded images and damage the weak signal of steganography. In this study, a robust JPEG steganographic scheme based on robustness measurement and cover block selection (CBSRS) is proposed. We first design a deep learning-based model to fit the blockwise change rate of coefficients after JPEG recompression. Then, a cover block selection strategy is proposed to improve the robustness by optimizing the joint distortion function of transmission costs and classic costs. Moreover, by embedding indicator of cover block selection in chrominance channels of JPEG images, a shareable cover construction scheme is designed to solve the problem of auxiliary information transmission. The experimental results show that our proposed framework improves robustness while maintaining statistical security. Comparing with state-of-the-art methods, the framework achieves better performance under given recompression channels.

Research on Project-based Teaching of Building Decoration Construction Technology

Building decoration construction technology is the professional core course of construction engineering technology major in higher vocational colleges. The focus of this course is to cultivate students' ability to prepare construction scheme, organize on-site construction, project quality inspection and on-site operation management and control. Starting from the characteristics of architectural decoration construction technology course, this paper carries out Project-based teaching design, establishes the Project-based teaching mode of "combination of work and study", and determines the specific teaching contents and assessment methods, to effectively promote the teaching reform of the course.

Campus Computer Network Construction Simulation and Cyber Security Technology

With the rapid development of the network age, the network has become an indispensable part of our daily life and work. Computer network is also an indispensable part in campus. How to build a suitable computer network according to the campus environment has become an important problem. Then, while improving the level of network security management, it helps the school carry out its work smoothly. Therefore, this paper expounds the construction scheme of campus computer network, so as to help the campus computer network more perfect.

Construction Scheme and Talent Policies of Free Trade Zones in China

Free Trade Zones (FTZs) are the important product of deepening reform, expanding opening up and promoting high-quality economic development under the unified deployment of the CPC Central Committee and the State Council of the People’s Republic of China. As the core competitiveness of FTZs, talents play an important role in the construction and development of FTZs, and the formulation of talent selection policies are vital in talent introduction. This article mainly discusses the construction scheme and talent policies of FTZs in China for reference of relevant departments.