Scrambling transformation plays an important role in information hiding application, so offering an effective evaluation method for scrambling algorithms is becoming increasingly necessary. The paper firstly analyzed the Arnold transformation process to get some universal rules about the periodicity of scrambling process, then used the improved Intersecting Cortical Model Neural Network (ICMNN) designed especially to extract 1D signatures of the original image and scrambled images which could effectively reflect the image structure changing processing. Finally L1 norm was adopted to evaluate the scrambling degree and the universal rules obtained above were used to verify the results. The experimental results showed that the proposed method could analyze and evaluate the scrambling degree efficiently and had a promising application future.

Evaluation of Image Scrambling Degree with Intersecting Cortical Model Neural Network

As IPv4 address resources being exhausted, the transition from IPv4 to IPv6 is inevitable and fairly urgent. The existing IPv6 transition techniques encountered several critical issues for large-scale deployment. For example, the lack of unified evaluation criterion makes it hard to select the appropriate transition strategy for a given scenario. This paper investigates and presents potential IPv6 transition scenarios and typical transition mechanisms in ISP networks, with emphasis on the provision of unified evaluation criteria in terms of functionality, applications, performance, deployment and security for IPv6 transition mechanisms and evaluation of these transition techniques based on the provided criteria. In addition, by virtue of the unified evaluation criteria, this study proposes a practical deployment of IPv6 transition strategy in the ISP's core and access networks. Finally, the consideration of IPv6 transition based on the emerging technology such as SDN to ease and accelerate its deployment is presented.

IPv6 Transition Mechanisms: Survey, Evaluation Criteria and Deployment Considerations

In the context of digital watermark technology,this paper introduced binary image based Arnold transform and periodicity,and discussed the calculation methods of image scrambling degree in detail so that it elaborated the best formula of image scrambling degree with the combination of pixel value variance as well as pixels and 4 differ of the gray-level.The results show that the calculating method of the best image scrambling degree can well reveal the consistency of binary image scrambling degree and subjective visual effects.

The best image scrambling degree of binary image based on Arnold transform

The quality of wireless user perception for cells in a particular scenario is reflected on a set of indicators. Comprehensive evaluation of those cells is the base of network optimization for operators. Traditional methods use weighted sum of all indicators as the evaluation result. However, these indicators include some ineffective ones, which leads to an unconvincing evaluation result. To achieve a convincing and accurate result, we propose a lightweight comprehensive evaluation method. Firstly, indicator selection is implemented via random forest algorithm. Secondly, those selected indicators are weighted via entropy method. Finally, we compute the score of all cells with the weights. Experiment results are given to show that the cells with higher score perform better on all indicators, which is coincide with the actual situation. Hence, our proposed method is not only lightweight but also obtain more accurate result.

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Random Forest Algorithm-Based Lightweight Comprehensive Evaluation for Wireless User Perception

Comprehensive evaluation methods of wireless user perception for cellular cells in the same scenario involve multi-indicators. Traditional methods use the weighted sum of all indicators as the evaluation result. However, many unimportant indicators occupy a part of the overall weight, which leads to an unconvincing evaluation result. To achieve a convincing and accurate result, we propose a lightweight comprehensive evaluation method. Firstly, most important indicators are chosen via the random forest algorithm. Secondly, those indicators are weighted via the entropy method. Finally, we compute the score of all cells with the weights. Experiment results are given to show that the cells with higher scores perform better in all indicators, which is coincide with the actual situation. Hence, our proposed method is not only lightweight but also obtain a more accurate result.

Lightweight Comprehensive Evaluation Method for Wireless User Perception Based on Random Forest

Wide and even distribution of pixels is the main parameter to evaluate the scrambling degree of the binary image. An evaluation method for the scrambling degree of the binary image is put forward by quoting the concepts of the bipartite graph and its degree along with applying the characteristic which the variance and mean square deviation can measure the discrete degree of nodes according to the pixels characteristic of the binary image. This method consists of dividing the image into the same size blocks, constructing the bipartite graph of every block, calculating its degree, building up a real sequence, analyzing the discrete degree of the sequence by applying the variance and mean square deviation, and, finally, deciding the scrambling degree of the binary image.

Binary image scrambling evaluation method based on the mean square deviation and the bipartite graph

In the IPv6 transition environment, in order to be able to provide fast support for IPv4 / IPv6 HTTPS service for the the entire network without changing the existing network and WEB applications, this paper designed a HTTPS service scheme with double stack reverse proxy in IPv6 transition stage. Through the deployment of reverse proxy service in the dual stack environment, while the HTTPS service port monitoring IPv4 and IPv6, combined with the DNS settings to support dual stack IPv4/IPv6 HTTPS service deployment, reverse proxy service makes the pure IPv4 and IPv6 users can access the HTTPS service. Based on open source software Bind and Nginx, this paper realizes the double stack access of HTTPS service without changing the existing network and WEB application, thus reducing the cost and difficulty of implementation. Using reverse proxy technology, the heavy SSL encryption, decryption and computing work is unloaded on the reverse proxy service, and the centralized optimization is processed. The practice shows that the caching mechanism of reverse proxy service not only does not increase the load of WEB application, but also effectively reduces the load of back-end WEB services and improves the access speed of HTTPS services. This paper implements the pan domain name processing of the two level domain name in Nginx reverse proxy service. When the back-end WEB service needs to be published or switched, only the DNS settings need to be changed while no reverse agents need to be configured, it is really easy to be managed and maintained.

Application research of HTTPS service architecture based on pan DNS in IPv6 transition stages

In order to reduce the implementation cost and difficulty of providing WEB service based on IPv6 protocol, and to take full advantage of multi-export links, this paper designs a WEB service framework supporting IPv4/IPv6 by combining intelligent DNS and reverse proxy technology aiming at the environment of multi-export links in university network Based on open source software BIND and Nginx, this paper proposes and implements a WEB service scheme combining intelligent DNS and reverse proxy technology Practical application shows that the framework we proposed is capable of improving the speed of users accessing campus network WEB services in the access link network, reverse proxy effectively reduces the load of WEB service The framework is based on open source architecture, which can be implemented without the modification of existing networks and WEB applications On the basis of reducing the implementation cost, the advantage of multi export links can be exploited The scheme can be deployed in other universities or similar network environments only by modifying configuration files

Deng Geng-sheng

Papers

Binary image scrambling evaluation method based on the mean square deviation and the bipartite graph

Application research of HTTPS service architecture based on pan DNS in IPv6 transition stages

Research and Implementation of Dual-stack Web Service Architecture Based on Intelligent DNS and Reverse Proxy Technology