• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권10호
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• pp.4157-4175
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• 2020

Moving target defense, as a 'game-changing' security technique for network warfare, realizes proactive defense by increasing network dynamics, uncertainty and redundancy. How to select the best countermeasure from the candidate countermeasures to maximize defense payoff becomes one of the core issues. In order to improve the dynamic analysis for existing decision-making, a novel approach of selecting the optimal countermeasure using game theory is proposed. Based on the signal game theory, a multi-stage adversary model for dynamic defense is established. Afterwards, the payoffs of candidate attack-defense strategies are quantified from the viewpoint of attack surface transfer. Then the perfect Bayesian equilibrium is calculated. The inference of attacker type is presented through signal reception and recognition. Finally the countermeasure for selecting optimal defense strategy is designed on the tradeoff between defense cost and benefit for dynamic network. A case study of attack-defense confrontation in small-scale LAN shows that the proposed approach is correct and efficient.

• 융합보안논문지
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• 제23권5호
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• pp.165-172
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• 2023

국가간에 이루어지는 사회공학 공격은 주로 비밀정보, 외교의 협상 또는 미래의 정책 변경에 대해 우위를 확보하기 위해 매우 효율적인 공격이므로 꾸준히 실시되고 있다. 우크라이나-러시아 전쟁이 장기화함에 따라 글로벌 해킹 조직의 활동이 꾸준히 증가하고 있으며, 주요 기반시설 또는 글로벌 기업 대상의 대규모 사이버공격 시도가 지속되므로 이에 대한 대응전략이 필요하다. 이를 위해 다양한 사회공학 공격 모델 중 물리적인 접촉을 배제한 사회공학 사이클이 가장 적합한 모델이라 판단하여 주요 위협국이 선호하는 사회공학 공격 방법을 사례분석을 통해 지정학적 전술과 비교하여 분석하였다. 그 결과 중국은 인해전술과 같은 질보다 양을 선호하는 피싱공격을 러시아는 마치 첩보전을 연상하는 은밀하고 복잡한 스피어 피싱을 선호하며, 북한은 미국과 한국에 대한 공격은 스피어 피싱과 워터링홀로 지정학적 전술을 응용하여 활용하였고 그 외 국가들은 대부분 랜섬웨어로 자금확보를 목표로 하였다. 이에 따라 중국에는 클린패스 정책, 러시아에는 주기적인 의무교육, 북한에는 국제적인 제재 등을 대응전략으로 제시하였다.

• 산업경영시스템학회지
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• 제18권33호
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• pp.135-141
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• 1995

Hearing protection devices (HPDs) are currently the most common countermeasure against occupational noise-induced hearing loss. Use of HPD is only effective when they are properly Worn. However, industrial workers often do not very them, posing a serious under protection. This paper analyzes several motivational strategies which might be applied improve HPD use in the field. It was concluded that such methods could readily be implemented in the workplace to protect workers exposed to hazardous industrial noises.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.515-520
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• 2011

The Climate Change has been emerged as one of the most important social and economic issues and is affecting our daily life. The Post-Kyoto Protocol aims to reduce GHG(Greenhouse Gas) emission and mitigate climate change. Under this protocol, developed countries which are classified as Annex I implements programmes and strategies confronting against the climate change. South Korea has set voluntary GHG reduction goal of 30% reduction compared to BAU(Business As Usual) in 2020 and prepares National GHG inventory system and Negotiated Agreements(NA) with industries. It will affect seriously to industry and transport sector and its obligation to reduce GHG emission will be strengthened gradually. Therefore, there will be large impact on industry structure. In Korea, various strategies against climate change are being prepared as researches of development of GHG emission reduction technologies and integrated GHG emission management system in transport sector. In this study, strategy on climate change in transport sector is proposed by being based on developed countries' respond to climate change in transport sector.

• 산업경영시스템학회지
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• 제32권2호
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• pp.104-111
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• 2009

Recently, it is becoming the big issue internationally where the safety problem of the industrial product including the foodstuffs. The way is able to construct the trust of the consumer that the external specialized agency independently operating confirms what production process of the product keep a standard or a technical regulation. This is conformity assessment. In the many countries, agencies entrusted government authority do conformity assessment. Specially, 'certification' in one form of conformity assessment process is operating a certification system at the government and the non-government body in Korea. Also non-government certification is fixed by trusted system from consumer. He has to prepare a competitive power in liberalization time, so need the countermeasure urgently. This study purpose that develops strategy so as to activating of non-government certification system in gist of the origination called 'self-control.' I present activation strategies using SWOT/AHP analysis.

• Steel and Composite Structures
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• 제34권5호
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• pp.699-713
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• 2020

The aerodynamic performance of long-span cable-stayed bridges is much dependent on its geometrical configuration and countermeasure strategies. In present study, the aerodynamic performance of three composite cable-stayed bridges with different tower configurations and passive aerodynamic countermeasure strategies is systematically investigated by conducting a series of wind tunnel tests in conjunction with theoretical analysis. The structural characteristics of three composite bridges were firstly introduced, and then their stationary aerodynamic performance and wind-vibration performance (i.e., flutter performance, VIV performance and buffeting responses) were analyzed, respectively. The results show that the bridge with three symmetric towers (i.e., Bridge I) has the lowest natural frequencies among the three bridges, while the bridge with two symmetric towers (i.e., Bridge II) has the highest natural frequencies. Furthermore, the Bridge II has better stationary aerodynamic performance compared to two other bridges due to its relatively large drag force and lift moment coefficients, and the improvement in stationary aerodynamic performance resulting from the application of different countermeasures is limited. In contrast, it demonstrates that the application of both downward vertical central stabilizers (UDVCS) and horizontal guide plates (HGP) could potentially significantly improve the flutter and vortex-induced vibration (VIV) performance of the bridge with two asymmetric towers (i.e., Bridge III), while the combination of vertical interquartile stabilizers (VIS) and airflow-depressing boards (ADB) has the capacity of improving the VIV performance of Bridge II.

• ETRI Journal
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• 제37권6호
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• pp.1108-1119
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• 2015

Multicast communication of mobile ad hoc networks is vulnerable to internal attacks due to its routing structure and high scalability of its participants. Though existing intrusion detection systems (IDSs) act smartly to defend against attack strategies, adversaries also accordingly update their attacking plans intelligently so as to intervene in successful defending schemes. In our work, we present a novel indirect internal stealthy attack on a tree-based multicast routing protocol. Such an indirect stealthy attack intelligently makes neighbor nodes drop their routing-layer unicast control packets instead of processing or forwarding them. The adversary targets the collision avoidance mechanism of the Medium Access Control (MAC) protocol to indirectly affect the routing layer process. Simulation results show the success of this attacking strategy over the existing "stealthy attack in wireless ad hoc networks: detection and countermeasure (SADEC)" detection system. We design a cross-layer automata-based stealthy attack on multicast routing protocols (SAMRP) attacker detection system to identify and isolate the proposed attacker. NS-2 simulation and analytical results show the efficient performance, against an indirect internal stealthy attack, of SAMRP over the existing SADEC and BLM attacker detection systems.

• 한국건설관리학회논문집
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• 제15권3호
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• pp.74-82
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• 2014

도시인구의 급격한 증가와 경제 성장으로 주택보급 문제를 원활히 해결하기 위한 정부의 주택보급정책으로 공동주택의 비중이 지속적으로 증가하였다. 이러한 보급률 제고와 함께 공동주택의 품질에 대한 관심이 높아짐에 따라 건설업체들은 소비자의 삶의 질 향상이나 타 업체의 치열한 경쟁에 맞추어 소비자의 만족도를 향상시키기 위한 노력을 지속적으로 수행하였다. 그러나 이러한 노력에도 불구하고 수요자의 기대수준과 공급된 공동주택의 품질의 차이로 인한 갈등이 심화되고 있으며 건설사들의 하자에 대한 소극적인 대처와 사전대응 전략의 미흡으로 하자관련 분쟁과 소송이 증가하고 있다. 이러한 건설사의 고객만족팀과 법무팀의 사후대처적, 소극적 대응은 이러한 건설관련 소송의 증가를 부추기고 있다. 따라서 본 연구에서는 실제 하자소송 판례를 중심으로 하자목록의 유형분석과 금액분석을 통하여 관리 우선순위를 도출하여 하자발생 이전에 대응 전략 수립이 가능한 하자기획소송 사전 대응모델을 개발하였다. 본 연구에서 개발된 대응 모델은 하자소송이 발생 한 이후의 대응이 아닌 프로젝트 초기단계부터의 대응 모델로서 하자소송의 위험성을 사전에 인지하고 이에 대한 관리전략의 수립에 기여할 것으로 기대된다.

• 무역학회지
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• 제42권3호
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• pp.1-24
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• 2017

본 연구는 2016년 WEF(다보스포럼)에서 화두가 된 4차 산업혁명이 무역에 미칠 영향을 고찰하고 우리나라가 무역 강국으로 재도약하기 위한 수출촉진전략을 제시한다. 4차 산업혁명은 종래의 3차 산업혁명 시대의 생산자동화를 넘어 사물인터넷(IoT), 사이버물리시스템(CPS), 인공지능(AI) 그리고 빅데이터 기술의 융·복합을 기반으로 생산기기의 초지능화 및 초연결성 실현을 통한 생산과정의 최적화를 의미한다. 이는 비단 무역을 넘어 사회전반에 영향을 미칠 것으로 전망되는바 본고는 우리나라가 직면한 저성장, 내수침체의 늪에서 벗어나기 위하여 전 세계가 직면한 4차 산업혁명이 무역에 미칠 영향을 고찰하고 나아가 수출촉진전략을 제시하고자 한다.

• 한국멀티미디어학회논문지
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• 제23권5호
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• pp.683-699
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• 2020

Recently, the earth's highest temperature is rising due to severe climate change and heat wave. In addition, due to the increase of elderly population over 65, the number of heat patients is also increasing. In particular, the elderly who live alone in poor living environments, the lower income group, and the socially disadvantaged, such as children and pregnant women, are exposed to the dangers of heat waves, so the government's practical measures are urgently needed. In this study, we will build a visualization platform for each level of heat wave and provide the necessary countermeasure solution according to the heat wave risk. "The Hazard Visualization Platform for Heatwave" provide not only simple information, but also a customized safety service for citizens to prevent heatwaves, respond to heatwaves, and utilize heat wave information.