• 정보처리학회논문지C
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• 제8C권6호
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• pp.711-720
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• 2001

인터넷을 구성하는 논리적인 도메인들의 규모가 확대됨에 따라 개체들간 보안 정책 협상이 복잡해지고 다양한 특성을 갖는 각 도메인들의 구성요소와 환경 등의 요인으로 각 시스템에 대한 보안 정책 설정 및 제어가 어려운 문제로 등장하고 있다. 이 논문에서는 이러한 현실적인 문제점을 해결하기 위해 대상 네트워크를 계층적 구조 구성한 후 그결과를 바탕으로 안전한 통신을 위한 보안 정책을 적용하기 위한 데이터베이스 스키마를 설계한다. 계층적 구조에서 서로 다른 도메인간에 보안정책은 보안정책 데이터 구조를 이용하여 효율적으로 데이터를 관리하고 보안정책 메커니즘을 이용하여 안전한 통신을 가능하게 한다.

• Journal of information and communication convergence engineering
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• 제8권5호
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• pp.549-553
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• 2010

Lim et al. proposed a Hybrid Group Key Management scheme for Hierarchical Self-Organizing Sensor Network in 2008 to provide a secure way to pass down the group key for cluster-based communication. This paper presents two practical attacks on the scheme proposed by Lim et al. by tampering sensor nodes of a cluster to recover necessary secret keys and by exploiting the IDS employed by the scheme. The first attack enables a long-term but slow data fabrication while other attack causes more severe DoS on the access to cluster sensor nodes.

• 정보통신설비학회논문지
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• 제8권4호
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• pp.216-222
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• 2009

This paper proposes an integrated mobile sink networks management system which can monitor and control various kinds of wireless lan access points, located in many different areas divided by their managing groups, from multi-vendors, and their operations in networks. The proposed system has the center-local interoperability structure cooperating with local-center servers which can perform the same operations as the central servers for wireless lan access points from multi-vendors and wireless lan centric management features. For this purpose, we propose a new way of data design, messaging policy, and hierarchical system structure such that we can achieve stable and consistent management methods for various wireless access points on distributed networks.

• 한국경영과학회지
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• 제19권1호
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• pp.69-83
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• 1994

This paper deals with a capacitated ring-star network design problem (CRSNDP) with node capacity constraints. The CRSNDP is formulated as a mixed 0-1 integer problem, and a 2-phase heuristic solution procedure, ADD & VAM and RING, is developed, in which the CRSNDP is decomposed into two subproblems : the capacitated facility location problem (CFLP) and the traveling sales man problem (TSP). To solve the CFLP in phase I the ADD & VAM procedure selects hub nodes and their appropriate capacity from a candidate set and then assigns them user nodes under node capacity constraints. In phase II the RING procedure solves the TSP to interconnect the selected hubs to form a ring. Finally a solution of the CRSNDP can be achieved through combining two solution of phase I & II, thus a final design of the capacitated ring-star network is determined. The analysis of computational results on various random problems has shown that the 2-phase heuristic procedure produces a solution very fast even with large-scale problems.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 추계종합학술대회
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• pp.58-62
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• 2007

최근 QoS(Quality of Service)의 요구가 증가되고 망내에서 트래픽이 갈수록 증가함에 따라 확장성을 보장하는 계층형 MPLS 네트워크의 연구가 진행되고 있다. 하지만 계층형 MPLS는 망을 이루는 edge,core망 계층의 증가와 각 망 계층내의 노드 증가에 따라 많은 LER과 링크가 발생하게 되고 이는 계층형 MPLS설치의 설치비용이 증가하는 문제가 있다. 따라서 본 연구에서는 계층형MPLS 망 계층간에 MPLS 네트워크를 구성하여 트래픽이 발생했을 경우 각 망 계층간의 LER수와 링크 수에 따른 패킷의 전송시간을 NS를 통해 시뮬레이션 하여 그 성능을 분석한다. 그 결과, 링크의 수가 증가함에 따라 전송속도의 성능이 향상됨을 확인할 수 있었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권6호
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• pp.1657-1673
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• 2023

With the advancement of information technology, criminals employ multiple cyberspaces to promote cybercrime. To combat cybercrime and cyber dangers, banks and financial institutions use artificial intelligence (AI). AI technologies assist the banking sector to develop and grow in many ways. Transparency and explanation of AI's ability are required to preserve trust. Deep learning protects client behavior and interest data. Deep learning techniques may anticipate cyber-attack behavior, allowing for secure banking transactions. This proposed approach is based on a user-centric design that safeguards people's private data over banking. Here, initially, the attack data can be generated over banking transactions. Routing is done for the configuration of the nodes. Then, the obtained data can be preprocessed for removing the errors. Followed by hierarchical network feature extraction can be used to identify the abnormal features related to the attack. Finally, the user data can be protected and the malicious attack in the transmission route can be identified by using the Wrapper stepwise ResNet classifier. The proposed work outperforms other techniques in terms of attack detection and accuracy, and the findings are depicted in the graphical format by employing the Python tool.

• 한국통신학회논문지
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• 제19권1호
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• pp.170-182
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• 1994

통신망 진화와 함께 다양하게 변화해가는 통신망 운용환경에 능동적으로 대처하기 위해서는 표준화된 개방형 구조를 지향하는 통신망 관리주고의 설계가 필수적으로 요구된다. 특히, 다양하고 이질저인 통신망 구성요소(NE:Network Element)들로 구성되는 통신망에서는 상호 연동성(interoperability)이 결여되어 통신망 운용관리측면에서 TMN 사용자가 필요로 하는 관리서비스 (MS: Management Service)의 효율적인 지원이 매우 어려원진다. 그러므로, 본 고에서는 국제표준화기구인 ITU-TS(Telecommunication Standardization Sector : CCITT)와 유럽의 RACE(R&D in Advanced Communications and Technologies in Europe) 프로그램 통신망에 취해지는 관리행위에 대한 요구사항을 기술한 서비스구성요소(MSC: Management Service Component)를 TMN 관리계층에 따라 계층화시키고, 관리응용기능 (MAF: Management Application Function)을 기능관점에서 분류한 관리기능영역(FA: Functional Area)들간의 정보흐름을 분석하는 등 Top-Down 접근방법에 의한 통신망 관리구조 설계에 대해서 기술하고자 한다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제11권4호
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• pp.318-328
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• 2011

Stage-level reconfigurable chip multiprocessor (CMP) aims to achieve highly reliable and fault tolerant computing by using interwoven pipeline stages and on-chip interconnect for communicating with each other. The existing crossbar-switch based stage-level reconfigurable CMPs offer high reliability at the cost of significant area/power overheads. These overheads make realizing large CMPs prohibitive due to the area and power consumed by heavy interconnection networks. On other hand, area/power-efficient architectures offer less reliability and inefficient stage-level resource utilization. In this paper, I propose a hierarchical multiplexing interconnection structure in lieu of crossbar interconnect to design area/power-efficient stage-level reconfigurable CMP. The proposed approach is able to keep the reliability offered by the crossbar-switch while reducing the area and power overheads. Experimental results show that the proposed approach reduces area by up to 21% and power by up to 32% when compared with the crossbar-switch based interconnection network.

• Journal of the Korean Data and Information Science Society
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• 제18권3호
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• pp.757-766
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• 2007

Location services are used in mobile ad hoc and hybrid networks to locate either the geographic position of a given node in the network or a data item. One of the main usages of position location services is presented in location based routing algorithms. In particular, geographic routing protocols can route messages more efficiently to their destinations based on the destination node's geographic position, which is provided by a location service. In this paper, we propose an adaptive location service on the basis of fuzzy logic called FHLS (Fuzzy Hierarchical Location Service) for mobile ad hoc networks. The adaptive location update scheme using the fuzzy logic on the basis of the mobility and the call preference of mobile nodes is used by the FHLS. The performance of the FHLS is to be evaluated by a simulation, and compared with that of existing HLS scheme.

• 정보처리학회논문지C
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• 제9C권3호
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• pp.421-430
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• 2002

본 논문에서는 PC나 라우터, 서버 장비 등 모든 정보자윈 시스템을 통합 관리하기 위한 시스템을 제안한다. 이 시스템은 PC 및 라우터의 회선에 대한 성능 분석 항목을 정의하고 분석하며, 서버 장비에 대한 자산 관리를 수행한다. 관리자는 분석된 데이터를 바탕으로 현재 시스템이나 회선에 대한 상태를 파악하기 위한 자료로 활용할 수 있다. 시스템의 구조는 차후 관리 도메인의 증설이 쉽고, 효율적으로 관리하기 위해 3계층으로 구분하여 관리하고자 한다.