• International Journal of Computer Science & Network Security
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• 제21권12호
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• pp.193-202
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• 2021

The article is devoted to current issues of the development of e-commerce, which is gaining more importance in the conditions of widespread quarantine restrictions. As a result, of the research the importance of digitalization as a driver of economic development is substantiated and the main business models of e-commerce and their modifications are examined. The peculiarities of e-commerce in the context of digital economy were analyzed and their current state was established. Identified the main trends in the development of e-commerce at the current stage, which allowed to identify problem areas that require further study and evaluation. Presented the results of the market research of decorative cosmetics, based on which the summarized set of problems that affect the online sales in this segment of the market.

• International Journal of Computer Science & Network Security
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• 제22권4호
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• pp.329-339
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• 2022

Small cells, particularly femtocells, are regarded a promising solution for limited resources required to handle the increasing data demand. They usually boost wireless network capacity. While widespread usage of femtocells increases network gain, it also raises several challenges. Interference is one of such concerns. Interference management is also seen as a main obstacle in the adoption of two-tier networks. For example, placing femtocells in a traditional macrocell's geographic area. Interference comes in two forms: cross-tier and co-tier. There have been previous studies conducted on the topic of interference management. This study investigates the principle of categorization of interference management systems. Many methods exist in the literature to reduce or eliminate the impacts of co-tier, cross-tier, or a combination of the two forms of interference. Following are some of the ways provided to manage interference: FFR, Cognitive Femtocell and Cooperative Resource Scheduling, Beamforming Strategy, Transmission Power Control, and Clustering/Graph-Based. Approaches, which were proposed to solve the interference problem, had been presented for each category in this work.

• International Journal of Computer Science & Network Security
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• 제22권2호
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• pp.297-303
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• 2022

The main purpose of the study is to determine the main aspects of the problem of socio-economic development in the conditions of the digital economy. The post-industrial era is characterized by the development of the electronic environment and the transition to an information civilization. In this regard, the developed countries of the world pay considerable attention to the development of the digital economy. However, there are a significant number of problems associated with this process. The country cannot be successful in the development of the digital economy in the absence of the necessary legal framework, an economic development strategy based on digital technologies. The research methodology involves the use of several theoretical methods for analyzing and synthesizing information. As a result of the study, the key problems of socio-economic development in the digital economy were characterized.

• International Journal of Computer Science & Network Security
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• 제22권10호
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• pp.137-144
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• 2022

Wireless community networks (WCNs) are considered another form of ownership of internet protocol (IP) networks, where community members manage and own every piece of equipment in a decentralized way, and routing for traffic is done in a cooperative manner. However, the current routing protocols for WCNs suffer from stability and scalability issues. In this paper, an enhanced routing protocol is proposed based on the optimized link state routing (OLSR) protocol to meet the standards of efficiency in terms of stability and scalability. The proposed routing protocol is enhanced through two phases: multicasting expansion and multipoint relay (MPR) selection based on an analytical hierarchical process (AHP). The experimental results demonstrate that the proposed routing protocol outperforms the OLSR protocol in terms of network control overhead and packet delivery ratio by 18% and 1% respectively.

• International Journal of Advanced Culture Technology
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• 제10권2호
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• pp.225-232
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• 2022

When we drive a vehicle in an IoT environment, there is a problem in that information of car users is collected without permission. The security measures used in the existing wired network environment cannot solve the security problem of cars running in the Internet of Things environment. Information should only be shared with entities that have been given permission to use it. In this paper, we intend to propose a method to prevent the illegal use of vehicle information. The method we propose is to use attribute-based encryption and dynamic threshold encryption. Real-time processing technology and cooperative technology are required to implement our proposed method. That's why we use fog computing's proxy servers to build smart gateways in cars. Proxy servers can collect information in real time and then process large amounts of computation. The performance of our proposed algorithm and system was verified by simulating it using NS2.

• International Journal of Computer Science & Network Security
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• 제23권2호
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• pp.164-172
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• 2023

Sharing power data between electrical power grids is crucial in energy management. The multi-agent approach has been applied in various applications to improve the development of complex systems by making them both independent and collaborative. The smart grid is one of the most intricate systems that requires a higher level of independence, reliability, protection, and adaptability to user requests. In this paper, a multi-agent system is utilized to share knowledge and tackle challenges in smart grids. The shared information is used to make decisions that aid in power distribution management within the grid and with other networks. The proposed multi-agent mechanism improves the reliability of the power system by providing the necessary information at critical times. The results indicate that the multi-agent system operates efficiently and promptly, making it a highly promising candidate for smart grid management.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2008년도 추계학술발표대회
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• pp.1517-1520
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• 2008

최근의 사이버 공격은 경쟁사에 대한 DDoS 공격과 기밀정보 유출, 일반 사용자들의 금융정보 유출, 광고성 스팸메일의 대량 발송 등 불법 행위를 대행해주고 경제적 이득을 취하려는 의도로 바뀌어 가고 있다. 그 중심에 있는 봇넷은 봇이라 불리는 감염된 호스트들의 네트워크 집단으로서 일련의 거의 모든 사이버 공격에 이용되고 있다. 이러한 봇넷은 수 많은 변종과 다양한 탐지 회피 기술로 그 세력을 확장해가고 있지만 마땅한 총괄적 대책은 미흡한 것이 현실이다. 이 논문에서는 날이 갈수록 위협을 더해가는 봇넷을 빠르게 탐지하고 대응하기 위해 ISP 사업자들 간, 혹은 국가 간에 걸친 사회 전반적인 협력을 통한 봇넷 탐지 및 관리 시스템 구조를 제안한다.

• International Journal of Computer Science & Network Security
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• 제24권2호
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• pp.95-100
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• 2024

Cyclic Delay Diversity (CDD) is a diversity scheme used in OFDM-based telecommunication systems, transforming spatial diversity into frequency diversity and thus avoiding intersymbol interference without entailing the receiver to be aware of the transmission strategy making the signal more reliable achieving full diversity gain in cooperative systems. Here the analyzation of the influence of CDD-SC scheme in Cognitive Radio Network (CRN) is done with the challenge of overcoming the complication called channel estimation along with overhead in CNR. More specifically, the closed-form expressions for outage probability and symbol error rate are divided under different frequencies among independent and identically distributed (i.i.d.) frequency selective fading channel model i.e., the signal is divided into different frequencies and transmitted among several narrow band channels of different characteristics. It is useful in the reduction of interference and crosstalk. The results reveal the diversity order of the proposed system to be mainly affected by the number of multipath components that are available in the CNR.

• 시큐리티연구
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• 제36호
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• pp.387-416
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• 2013

본 연구는 2010년 서울에서 개최된 G20 정상회의 행사의 안전활동 문제점을 도출하여 이를 토대로 향후 우리나라에서 개최될 국제회의 안전활동에 대한 발전방안을 모색해 보는데 그 목적이 있다. 이와 같은 목적을 달성하기 위하여 G20 정상회의 행사에 직접 참여한 경찰, 소방, 군, 국정원 등 안전기관의 문제인식 차이를 통하여 제반적인 문제점을 도출해 보고자 한다. 이를 위해 G20 정상회의 행사에 차출되어 근접 근무한 4개 안전기관 직원을 대상으로 델파이방법에 의해 의견을 수렴, 국제회의의 단계별 구성요소 및 문제점을 파악하고 구성요소별로 문제인식에 대한 통계처리를 실시하였다. 이와 함께 안전기관 전문가 4명과 1:1 면담결과를 통하여 국제회의 행사에 있어서 행사장에서 주로 이루어지는 실시단계는 어떤 역할을 수행하며 그 중요성이 무엇인지를 확인한 결과는 다음과 같다. 첫째, '안전의전 부문'으로 의전과 안전은 순치관계로 비유될 정도로 상호 상생이 필요하기 때문에 더욱 긴밀한 협력과 정보교환이 요구된다. 둘째, '상황관리 부문'에서는 준비기획단을 중심으로 광역지자체, 제 안전기관간의 신속하고 유기적인 정보교환 및 기능별, 장소별로 분산된 모든 안전인력을 통합적으로 운용할 수 있도록 각 안전기관의 상황실간 협조체제를 강화해야 한다. 셋째, '안전인력자원관리 부문'에서는 제 안전인력이 행사에 전념할 수 있는 시스템을 강구하고, 여건이 충족될 수 있도록 지도층의 격려와 관심이 필요하다. 넷째, '지자체협조지원 부문'에서는 국제회의 개최도시의 광역지자체는 국제회의 각종 시설의 운영, 회의운영 지원, 관광 등 행사 파급효과 달성, 숙박시설 서비스의 극대화, 교통시설의 정비 등에서 1차 책임을 수행하므로 시 도지사의 관심 하에 특별점검을 수행해야 한다.

• Strategy21
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• 통권42호
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• pp.258-292
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• 2017

This paper is designed to make a national strategic concept for the ROK's maritime security and to explore cooperation directions for the ROK Navy and Coast Guard in order to implement the newly-made maritime security strategic concept. As strategy is composed of three main categories(goals, ways, means), the goal of the ROK's maritime security strategy is 'Safe and Affluent Sea' and the way to realize the goal is the principle of cooperative leverage, and the means as tasks to implement the strategic concept are maritime safety, maritime security, and maritime stewardship. The concept of national fleet as used in the US is applied to promoting the cooperation between the ROK Navy and Coast Guard. Thus, under the newly-established maritime security strategic concept along with the national fleet model, followings are suggested as policy proposals for facilitating mutual cooperation between the ROK Navy and Coast Guard in dealing with not only traditional threats but also non-traditional treats at sea and from the sea as well. First, the ROK Navy and Coast Guard has been making efforts to enhance interoperability between the two sea services. However, the mutual cooperations have been focused mainly on areas on operational level rather than policy level. Therefore, the two sea services are recommended to enlarge exchanges and cooperation in policy areas. Second, there are still demands for further cooperation areas between the two sea services in command and communications. The interoperability in C2 between the two needs to be upgraded even to the areas of anti-terrorist activities ar sea, ASUW, ASW, maritime interdiction, etc. Third, mutual comparability between the two needs to be reflected in the maritime forces development to ensure the comparability in UNREP and other logistics areas. Fourth, the standardization of logistical materials and equipments is needed as a way of sustaining operational capability and logistical capacity for the ROK Navy and Coast Guard as well. Fifth, the ROK Navy and Coast Guard are recommended to participate more actively in international maritime cooperation activities such as PASSEX. Sixth, Complementary laws and regulations need further to be revised and to be newly made for collectively managing swiftly maritime accidents and natural disasters at sea.