Development Of Computer Networks Research Articles

Information Security Coding Rule Based on Neural Network and Greedy Algorithm and Application in Network Alarm Detection

With the development of computer network, network information resources have brought great convenience to users. However, the security problems of computer network have become increasingly prominent, and the main threat is the invasion of the information system through the network. Network intrusion will bring great losses to society, especially to the government and military agencies. With the increase of network intrusion, the firewall can't resist the attack on the network. Intrusion detection system makes up the shortcomings of traditional Internet security technology, and it is a kind of active defense technology. Through security log, audit data and other information, intrusion detection system can detect the network attacks and take the corresponding measures. Intelligent intrusion detection system is a hot spot in the field of network security, commonly based on neural network, genetic algorithm, greedy algorithm, fuzzy technology, and so on. In this paper, we apply the neural network and the greedy algorithm into the network security detection system. We analyze the theories of neural network and greedy algorithm, and introduce the evaluation model of network security system. Experiments show that the information security coding rule based on neural network and greedy algorithm can help network monitoring system better detect the network attacks.

Design and Implementation of a Students Online Examination System Based on B/S Architecture

With the development and popularization of computer network in science and education, the traditional way of examination with examination papers, answering mode and score management is undergoing tremendous changes. There are three modules (named administrator, teachers and students) in the students online examination system based on B/S architecture. Functions such as system management, teacher user management, examination paper bank management and issue announcement are belong to the administrator module. The function of the teacher module includes teacher information maintenance, student account management, exam management module, examination paper management, examination paper analysis, result statistics and so on. And the function of the student module includes student information maintenance, online test, score query and other functions.

Invisible watermarking optical camera communication and compatibility issues of IEEE 802.15.7r1 specification

Copyright protection and information security are two most considered issues of digital data following the development of internet and computer network. As an important solution for protection, watermarking technology has become one of the challenged roles in industry and academic research. The watermarking technology can be classified by two categories: visible watermarking and invisible watermarking. With invisible technique, there is an advantage on user interaction because of the visibility. By applying watermarking for communication, it will be a challenge and a new direction for communication technology. In this paper we will propose one new research on communication technology using optical camera communications (OCC) based invisible watermarking. Beside the analysis on performance of proposed system, we also suggest the frame structure of PHY and MAC layer for IEEE 802.15.7r1 specification which is a revision of visible light communication (VLC) standardization.

Концепция механизма адаптивного управления сетевыми ресурсами

The concept of a mechanism for adaptive control of resources available in a corporate computer network is considered. The main trends in the development of computer networks are described, and the main problems requiring additional research and development are pointed out. The existing methods for distributing load among the available network resources in an automated manner are subjected to a comparative analysis. A mechanism for adaptively altering the network users’ priorities and redirecting the transactions forming the data traffic flows in the peak load modes on the basis of software-defined networking principle is proposed. An algorithm for implementing the developed mechanism is presented. The objective that has been set forth is solved by integrating a dedicated controller into the corporate computer network topology. The abovementioned controller is essentially a computerized module that performs the basic functions of monitoring the network resources, identifying the priority pairs of users initiated the transmission of data blocks, determining the backup routes, creating a data flow tables, and assigning the shaped flows to the network switches. An example corporate computer network is considered, in which high-performance host machines exchange large amounts of data in the real time mode using the main and backup communication channels. The feasibility of the proposed concept of the adaptive network resource control mechanism has been confirmed experimentally. The results of experimental testing carried out on a corporate computer network fragment are presented, which confirm an increase in the data transmission rate between a pair of priority users in comparison with the channel aggregation mechanism.

К 40-летию кафедры прикладной математики: исследования и разработки в области обучения, программирования, информационных технологий и искусственного интеллекта

The concept of a mechanism for adaptive control of resources available in a corporate computer network is considered. The main trends in the development of computer networks are described, and the main problems requiring additional research and development are pointed out. The existing methods for distributing load among the available network resources in an automated manner are subjected to a comparative analysis. A mechanism for adaptively altering the network users’ priorities and redirecting the transactions forming the data traffic flows in the peak load modes on the basis of software-defined networking principle is proposed. An algorithm for implementing the developed mechanism is presented. The objective that has been set forth is solved by integrating a dedicated controller into the corporate computer network topology. The above-mentioned controller is essentially a computerized module that performs the basic functions of monitoring the network resources, identifying the priority pairs of users initiated the transmission of data blocks, determining the backup routes, creating a data flow tables, and assigning the shaped flows to the network switches. An example corporate computer network is considered, in which high-performance host machines exchange large amounts of data in the real time mode using the main and backup communication channels. The feasibility of the proposed concept of the adaptive network resource control mechanism has been confirmed experimentally. The results of experimental testing carried out on a corporate computer network fragment are presented, which confirm an increase in the data transmission rate between a pair of priority users in comparison with the channel aggregation mechanism.

Differential Mathematical Models to Investigate the Computer Network Architecture of an All-Mode System of Control over a Distance of Railways

The evolutionary development of railway power-supply systems and computer networks and technologies that control these systems are analyzed. It is shown that the optimization of electricity consumption is based on the intellectualization of electricity supply procedures. A graph is constructed whose topology adequately represents the typical architecture of a computer network of control at the layer of a distance of power supply of railways with a view to investigating the mutual integration of a power supply infrastructure and a computer network architecture of all-mode control. This article proposes a differential mathematical model for investigating the computer network architecture of an all-mode system of control over a distance of power supply and methods (in analytical form) for determining values of probabilities of states of system nodes, their capacities, and the number of failures of requests as the basis for the intellectualization of power supply procedures.

Juridical Study of Crimes Committed with Computer

<p class="a">By development of computer networks, computer -related crime spreading immoral that had negative impact on social systems including families and organizations and, more children were invaded by, the spread of computer crimes in the third world called cultural invasion.</p><p class="a">Committing dishonest acts in ignorance or belief that the right to intervene in the operation of computer systems or data entry, or data deletion, or the messages. those committed acts does not categorize in fraud documentary, if the aforementioned act intended to endamage business rivals and if there is no property gained then that act does not categorize in fraud documentary too. Motivation and intention of act does not impact on kind of crime realization. E-commerce law states in Article 67: (perpetrator is punishable if committed as a result of using fraudulent means, personal or automated processing systems deceived in order to gain a person’s property. For this reason, the mere intention to resort to dishonest means and education funds, property or privileges, is not sufficient to fulfill the offense.</p>

A synthetic research on the multimedia data encryption based mobile computing security enhancement model and multi-channel mobile human computer interaction framework

With the development of computer network, people could obtain information through the network with stronger impulsion, the dependence of the requirements also becomes higher, this is not only reflected in the increase of information, but to obtain and submit more reflected in real-time and easy to access to information on the pressing needs of the. Therefore, people devoted all aspects from the terminal, network and software platforms to make unremitting efforts. Under this basis, we conduct synthetic research on the data encryption based mobile computing security enhancement model and multi-channel mobile human computer interaction framework in this paper. We firstly introduce the discrete-time Hopfield neural network based data encryption algorithm beyond the analysis on the information flow security and type based model, data security review and attack model under mobile computing environment. We improve learning algorithm of the MD method to avoid the sample mobile and cross interference problems of Hebb rule. Later, we integrate the multi-channel concept to propose the new multi-channel man–machine interaction. In our framework, the 3D interactive technology, speech recognition and synthesis technology, natural language understanding and processing technology, eye tracking technology, posture, input, tactile, force display basic technology are taken into consideration for the synthetic analysis. The result from the experimental simulation proves that our methodology obtains better effectiveness and feasibility from both the angels of data security and interface experience.

Color Digital Image Encryption Technology and Software Implementation based on Chaotic Map

Digital image information security, is accompanied by the rapid development of computer network and multimedia technology and the emergence of new problems. In recent years, the image information on the Internet more and more popular, but for some image information relating to personal privacy and national security, we must take the secret transmission mode, the image encryption technology more and more attention, research has important image encryption technology practical significance. Based on MFC and Matlab7.0 development tools, the paper design color image based on coupling chaotic encryption algorithm developed into an application software that fully implements all the performance of the proposed design of the cryptographic algorithm, and a beautiful interface, easy operation intuitive algorithm evaluation function and so on. In this paper, a digital color image encryption algorithm based on chaotic mapping. It was proposed based on color image encryption algorithm disaster and chaos mapping combined color image encryption algorithm based on logistic mapping, and two encryption algorithms performance comparison and analysis.

On the Internal Workings of Botnets: A Review

Denial of Service and Distributed Denial of Service Attacks have significantly shackled the development of computer networks and the internet, and masked their innumerable benefits behind many hours of service unavailability. These attacks are fostered, especially in their distributed variant, by networks of compromised machines (known as botnets, that is, a network of bots) that are taken over by a hacker / attacker, and coordinated in such a way as to channel overwhelming loads of malicious or useless traffic towards resource-providing / request-servicing servers. In the long run, a sufficient load of these traffic, overwhelm target servers and constitute them unable to service the requests of legitimate users that have subscribed legally to use these resources. This army of compromised systems have also been recently linked to various malicious and nefarious activities that have been taking place on computer networks and the internet in recent times; such activities relate to malware injection / infiltration, fraud, espionage, amongst others. This paper reviews the operations and coordination of botnets and the interactions that take place within the botnet during such malicious activities. New, valuable insights are provided towards the detection of such malicious networks through the introduction of the reverse life cycle of botnets.

The Comparison of Access Point Signal Gain with Beverage Cans

Computer network development depends on the development of information technology and communication. Several things as the reasons to develop the technology of computer network are implementing communication flexibly which in this case in the theory of computer network is to build wireless network communication. The existence of wireless communication as the comparison against wired network, having different impairment compared to wired communication. One of which is the weakening of wireless signal strength towards the ongoing communication distance. Therefore in wireless communication currently plenty of it being implemented, to handle the occurring impairment due to distance influence, it is needed for signal amplifier device. One of signal amplifier that can be used in the surroundings which is economical and practical is by using used beverage can.

Research on the Mode of Enterprise Service Innovation in Micro Era

Service innovation as an important technology innovation form, plays more and more important role in economic growth and social development, it has received extensive attention from both academic and industrial circles. This paper analyzes the driving force and the modes of the enterprises service innovation, points out the problem of enterprise service innovation in era, and proposes the improvement of enterprise service innovation strategy. Nowadays, we have entered a worthy of the name Micro message, micro-blog, credit, novel, film, media, advertising, payment, and so on, all of these new cultural form, mode of transmission, economic activity patterns, lifestyles, accompanied by the rapid development of computer network and mobile Internet, has subliminally defined our lives in potential. So we can say that micro has become a key word of our lives. The economy is Post-Fordism economic, more personalized products and services oriented, and the quality is higher than the scale, green, interactive, dialogue and win-win. The economy respects every consumer demand, the services are more meticulous. Micro era put forward higher requirements to enterprise service, not only provides multidimensional service, but also requires a corresponding service innovation, customers can comments on services through the Internet or mobile terminal, enterprises need to respond quickly to customers. The enterprise service innovation from internal drive to the external drive, from customer participation to customer orientation, from enterprises provided to custom driven in era. At present, the essence of era is based on Internet technology as the core of the network information society; it has become an important way to promote enterprise service innovation. The information value lies in that it not only can improve the operation efficiency of industry, also plays more and more important role in the integration of organizational and social resource. Thus, there exists a close relationship between enterprise informatization and service innovation, which cannot be ignored in the study of the service innovation of enterprise, enterprise most services can become more efficient through the information technology (such as the Internet and communication technology).However, from the retrieved literature, few scholars do research on the service innovation of enterprise from the information technology, information technology, e-commerce perspective. In this paper, analyzed some existing problems of enterprise service innovation in era from the basic meaning of service innovation and driving force, then proposed the enterprise service innovation strategy to solve these problems, which has an important guiding significance for the enterprises to carry out the service innovation in the new period.

Educational Virtual-Wear Trial: More Than a Virtual Try-On Experience.

Developments in computer capabilities, networks, mobile devices, and social media have enabled researchers and educators to increasingly employ blended strategies when developing new learning technologies. In addition, there is a growing need to develop discipline-specific learning technologies as result of expanding research in various domains. The study reported here was conducted in the context of a textile and clothing higher education course. The key aim was to develop a new learning technology for university students, specifically to help them learn about clothing thermal functional design (CTFD).

Research on Perception-Oriented Image Scene and Emotion Categorization

With the development of multimedia technology and computer network, the number of available images in- creases with an explosive speed. But the technology also brings some trouble to its users, sometimes it's very difficult for us to find some details that very important from a huge amount of available data. At this time, image scene and emotion categorization technologies are required urgently. The purpose of emotional image classification is that we hope the com- puter can express the emotion reaction when observing the image, and classify the images into the different emotional categories automatically. The process of scene image classification is that how to make computer systems to classify the image sets automatically which contain semantic information, according to the visual perception mechanism of human. Here, for the scene categorization problem based on the visual words, the dissertation presents a novel learning framework to design discriminating semantic visual words. At last, for the emotion categorization of natural scene images, the disser- tation presents an emotion categorization using Affective-probabilistic Latent Semantic Analysis model based on the vis- ual cognitive theory.

Researching Indistinguishability of the Polymorphism Time Stamp Watermarking

With the rapid development of computer network, digital watermarking, which is an effective digital products copyright protection technology, was widely applied in the security forensic. Those were analyzed that are the defects of existing time stamp scheme of digital watermarking and the characteristics of the pseudo-random sequence. The new scheme based on time stamp and pseudo-random sequence was proposed. Indistinguishability and scalability of watermark were analyzed from the experimental results. And other two aspects were obviously improved in the new scheme, which were in improving protocol’s security and reducing the quantity of data embedded in digital works.

Optimal Choice of Random Variables in D-ITG Traffic Generating Tool using Evolutionary Algorithms

Impressive development of computer networks has been required precise evaluation of efficiency of these networks for users and especially internet service providers. Considering the extent of these networks, there are numerous factors affecting their performance and thoroughly investigation of these networks needs evaluation of the effective parameters by using suitable tools. There are several tools to measure network's performance which evaluate and analyze the parameters affecting the performance of the network. D-ITG traffic generator and measuring tool is one of the efficient tools in this field with significant advantages over other tools. One of D-ITG drawbacks is the need to determine input parameters by user in which the procedure of determining the input variables would have an important role on the results. So, introducing an automatic method to determine the input parameters considering the characteristics of the network to be tested would be a great improvement in the application of this tool. In this paper, an efficient method has been proposed to determine optimal input variables applying evolutionary algorithms. Then, automatic D-ITG tool operation would be studied. The results indicate that these algorithms effectively determine the optimal input variables which significantly improve the D-ITG application as the time cost of determining optimal DITG variables in automatic GA, ICA and ACO based methods has been improved up to 67.3 %, 69.7 % and 82.2 %, respectively.

Service Dynamic Trust Evaluation Model based on Bayesian Network in Distributed Computing Environment

In recent years, with the rapid development of computer network, distributed computing system has a very vast application prospect and potential utility value, which opens up a wealth of opportunities for different applications. With the characteristics of dynamic, heterogeneity, distribution, openness, voluntariness, uncertainty and deception, how to obtain trustworthy computing resource becomes a key issue in large-scale distributed computing research. Therefore, with considering the complex characters of trust in distributed computing environment, firstly, we construct STE architecture to rank and observe trust, which includes STE Broker, Monitoring and STE Catalogue. Secondly, a more comprehensive dynamic trust evaluation model is constructed based on Bayesian network. Finally, we apply simulation platform to imitate trust evolution process and collect related data, and the proposed method has been serviced in complex simulation system, and the results have indicated that the model is unbiased and effective. The first part is the research status and related problems. The second part is the establishment of an evaluation model. The last part is the experimental analysis and conclusion.

A biometrics and smart cards-based authentication scheme for multi-server environments

With the rapid development of computer networks, multi-server architecture has attracted much attention in many network environments. Moreover, in order to achieve non-repudiation which both passwords and cryptographic keys cannot provide, several password authentication schemes combining a user's biometrics for multi-server environments have been proposed in the past. In 2014, Chuang et al. presented a biometrics-based multi-server authenticated key agreement scheme and declared that their scheme was efficient and secure. Later, Mishra et al. commented that the scheme by Chuang et al. was susceptible to stolen smart card, impersonation and denial of service attacks. To conquer these weaknesses, Mishra et al. presented an efficient biometrics-based multi-server authenticated key agreement scheme using hash functions. However, we prove that the scheme by Mishra et al. is insecure against forgery, server masquerading and lacks perfect forward secrecy. The focus of this paper is to present a robust biometrics and public-key techniques-based authentication scheme, which is a significant enhancement to the scheme recently proposed by Mishra et al. The highlight of our scheme is that it not only conquers the flaws but also is efficient compared with other related authenticated key agreement schemes. Copyright © 2015John Wiley & Sons, Ltd.

Botnet in DDoS Attacks: Trends and Challenges

Threats of distributed denial of service (DDoS) attacks have been increasing day-by-day due to rapid development of computer networks and associated infrastructure, and millions of software applications, large and small, addressing all varieties of tasks. Botnets pose a major threat to network security as they are widely used for many Internet crimes such as DDoS attacks, identity theft, email spamming, and click fraud. Botnet based DDoS attacks are catastrophic to the victim network as they can exhaust both network bandwidth and resources of the victim machine. This survey presents a comprehensive overview of DDoS attacks, their causes, types with a taxonomy, and technical details of various attack launching tools. A detailed discussion of several botnet architectures, tools developed using botnet architectures, and pros and cons analysis are also included. Furthermore, a list of important issues and research challenges is also reported.

Computer Network Attack Modeling and Network Attack Graph Study

With the development of computer network and rapid popularity of Internet, network information security has become the focus of safeguarding national security and social stability. In the network security event, the hacker often can’t successfully intrude into the network by means of a single host / services hacker. With the help of various kinds of "vulnerability" generated bydifferent relationship existing in multiple point multiple host, the hacker can achieve the purpose of network intrusion. Therefore one important aspect of network security is after obtaining the vulnerability of the network information, considering a combination of multiple exploits and analyzing the attack path of network penetration attacks that the attacker may take.