• Journal of Communications and Networks
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• 제11권6호
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• pp.634-644
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• 2009

A diversity of wireless networks, with rapidly evolving wireless technology, are currently in service. Due to their innate physical layer vulnerability, wireless networks require enhanced security components. WLAN, WiBro, and UMTS have defined proper security components that meet standard security requirements. Extensive research has been conducted to enhance the security of individual wireless platforms, and we now have meaningful results at hand. However, with the advent of ubiquitous service, new horizontal platform service models with vertical crosslayer security are expected to be proposed. Research on synchronized security service and interoperability in a heterogeneous environment must be conducted. In heterogeneous environments, to design the balanced security components, quantitative evaluation model of security policy in wireless networks is required. To design appropriate evaluation method of security policies in heterogeneous wireless networks, we formalize the security properties in wireless networks. As the benefit of security protocols is indicated by the quality of protection (QoP), we improve the QoP model and evaluate hybrid security policy in heterogeneous wireless networks by applying to the QoP model. Deriving relative indicators from the positive impact of security points, and using these indicators to quantify a total reward function, this paper will help to assure the appropriate benchmark for combined security components in wireless networks.

• 시큐리티연구
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• 제41호
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• pp.7-36
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• 2014

본 연구는 2015년부터 감시 단속적 근로자들에게 최저임금 100%가 적용되면서 아파트 관리비 인상의 부담으로 인해 경비체계를 유인화 시스템에서 무인화 시스템으로 바꾸거나 경비원의 인력을 대폭 감소시키려는 아파트가 증가하고 있다. 이러한 현 상황에서 아파트 경비의 유 무인화에 대한 경제성 비교 연구를 실시하였다. 이를 위해 비용 편익분석을 통해 2014년부터 2018년까지 5년간 아파트 유 무인 경비시스템의 경제성 비교를 실시하였다. 분석 결과, 무인경비 시스템의 비용 편익 비율은 최소값의 경우 1.66%와 최대값의 경우 1.30%의 편익이 발생된 것을 알 수 있다. 또한 유인경비 시스템의 비용 편익 비율은 최소값의 경우 1.42%와 최대값의 경우 1.66%의 편익이 발생한 점을 미루어 볼 때 아파트 경비시스템 체계를 유인시스템에서 무인시스템으로 변경할 경우 경제적으로 큰 효용성을 얻기가 힘들 뿐만 아니라 특히 최대값의 경우 오히려 무인경비 시스템 보다 유인경비 시스템의 경제적 효용성이 큰 것으로 나타났다.

• 법제연구
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• 제41호
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• pp.171-200
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• 2011

우리나라에서 서민취약계층의 보호는 현재 "국민기초생활보장법"이 주로 담당한다. 하지만 현행법은 소득과 재산, 부양의무자 등을 기준으로 절대적 빈곤층의 보호만을 고려하고 있기 때문에 서민취약계층의 보호에 미흡하다. 구체적으로 현행법은 상대적 빈곤선을 예정하고 있지 않아 서민취약계층의 경제적 수요를 보호하는데 한계가 있다. 또한 급여의 지급이 통합되어 지급되기 때문에 서민취약계층의 개별적인 사회적 수요를 보호하는 데 미흡하다. 그리고 부양의무자 기준이 너무 엄격하여 법적 보호를 받지 못하는 사각지대를 형성하는 주요원인이 되고 있다. 따라서 본 연구에서는 서민취약계층의 보호를 위한 발전방안으로 첫째, "국민기초생활보장법"상 최저생계비를 결정함에 있어 상대적 빈곤선의 개념을 도입할 것을 제안하였다. 둘째, 통합급여와 개별급여의 혼합방식을 채택하여, 서민취약계층의 사회적 수요에 유연하게 대처할 것을 제안하였다. 셋째, 부양의무자 기준이 실제 부양하고 있는지의 여부에 따라 판단되어야 할 것을 제안하였다.

• International Journal of Computer Science & Network Security
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• 제21권5호
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• pp.217-221
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• 2021

Recent studies have indicated that mobile markets harbor applications (apps) that are either malicious or vulnerable, compromising millions of devices. Some studies indicate that 96% of companies' employees have used at least one malicious app. Some app stores do not employ security quality attributes regarding authorization, which is the function of specifying access rights to access control resources. However, well-defined access control policies can prevent mobile apps from being malicious. The problem is that those who oversee app market sites lack the mechanisms necessary to assess mobile app security. Because thousands of apps are constantly being added to or updated on mobile app market sites, these security testing mechanisms must be automated. This paper, therefore, introduces a new mechanism for testing mobile app security, using white-box testing in a way that is compatible with Bring Your Own Device (BYOD) working environments. This framework will benefit end-users, organizations that oversee app markets, and employers who implement the BYOD trend.

• 경영정보학연구
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• 제19권3호
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• pp.201-228
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• 2017

정보자산에 심각한 피해를 입힐 수 있는 보안 취약점 정보는 상품으로서 가치를 갖게 되었으며 취약점마켓이 형성되었다. 이러한 보안 취약점 정보는 심각성과 중요도에 따라 취약점마켓에서 수백 달러부터 수십만 달러로 거래되고 있으며 종류와 범위는 다양해지고 있다. 본 연구는 취약점마켓과 해커에 관한 선행연구를 토대로 보안 연구자의 취약점 연구동기와 취약점마켓 이용의도에 영향을 미치는 요인에 대한 실증 분석을 실시하였다. 연구결과는 다음과 같다. 첫째, 취약점 연구 자기효능감은 몰입, 화이트마켓 이용의도, 블랙마켓 이용의도에 유의한 영향을 미치고 인지된 이익에는 유의한 영향을 미치지 않았다. 둘째, 몰입은 인지된 이익과 블랙마켓 이용의도에 유의한 영향을 미쳤으나 화이트마켓 이용의도에는 유의한 영향을 미치지 않았다. 셋째, 인지된 이익은 화이트마켓 이용의도와 블랙마켓 이용의도에 모두 유의한 영향을 미쳤다. 넷째, 취약점 연구 자기효능감은 몰입을 매개로 인지된 이익에 유의한 영향을 미쳤다. 다섯째, 몰입은 인지된 이익을 매개로 화이트마켓 이용의도와 블랙마켓 이용의도에 모두 유의한 영향을 미쳤다. 본 연구는 취약점 연구경험이 있는 보안 연구자의 행동 예측에 활용될 수 있을 것이다.

• 사회경제평론
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• 제29권1호
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• pp.99-117
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• 2016

본 연구에서는 미국 연방공무원 연금제도의 제도적 특성과 1980년대 중반 미국의 연방공무원 연금제도 개혁의 주요 내용들을 재평가할 것이다. 80년대 연방공무원 연금제도의 개혁을 이끌었던 핵심 조치는 1983년 사회보장법의 개정과 1986년 연방공무원 퇴직제도 법의 도입이었다. 다음으로 현재 미국 연방 공무원 연금제도로 병존하고 있는 CSRS(구 연방 공무원 연금제도)와 FERS(신 연방공무원 연금제도)의 주요 특성을 비교 검토할 것이다. 마지막으로 2015년 우리나라 공무원 연금개혁이 얼마나 부실하고 미진했는지를 우회적으로 보여주려는 취지에서 미국 연방공무원 연금제도 개혁의 주요 내용을 재음미해 볼 것이다.

• 한국멀티미디어학회논문지
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• 제18권4호
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• pp.506-523
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• 2015

The intent is to determine whether or not the custody transfer is helpful for data transmission in challenging underwater communications when running Bundle protocol or underwater protocols. From the point of view defending side, Underwater Acoustic Network (UAN) will be a serious threat for its strong functionality long rang and high precision of surveillance and detection. Therefore, countermeasures must be taken to weaken its effect. Our purpose is analyzed that how to benefit from the UIoT to learn from, exploit and preserve the natural underwater resources. Delay/Disruption Tolerant Network (DTN) is essential part of the network heterogeneity communication network. The vulnerability and potential security factors of UIoT are studied thereafter. Security mechanisms for an underwater environment are difficult to apply owing to the limited bandwidth. Therefore, for underwater security, appropriate security mechanisms and security requirements must be defined simultaneously. The paper consists of mathematical and security model. Most important point of view in the security challenges of effective Buffer and Storage management in DTN.

• 농업과학연구
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• 제27권2호
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• pp.158-175
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• 2000

Up to date, the economic feasibility analysis on land consolidation and on-farm development projects were mainly depended upon the direct benefits from market value of project outputs. Therefore the projects were neglected in allocation of the government's financial funds and loans on account of undervaluation of the project benefits including socio-economic and environmental values of the projects. Accordingly the Extended Benefit Cost Analysis Method should be adapted to cover not only the benefits such as non-market values of environmental functions of the projects and but also the economic market values of the project outputs. The main objectives of this study is (1) to provision of the guideline for economic feasibility analysis based on the IBRD and ADB guidelines, (2) to estimate the benefits such as Productivity increase effect, labor saving effect, off-farm income increase effect during off-farm season, saving of O&M cost of farm mechanization, enhance of farmer's public health, increase of environmental public function of paddy fields, effect of food security and establishment of peaceful and uncontroversial rural society by implementing the land consolidation and on-farm development, (3) to introduce the newly adapted analytical method as the extended benefit cost analysis which could make possible the analysis of non-market goods such as the food security value and the environmental public value of paddy fields. To carry out the study, the publication on the guideline for economic analysis of agricultural projects were reviewed and consulted and for the post evaluation of the land consolidation and on-farm development project, field survey in Jeongja area were made for the feasibility study of the project by new method. According to the initial project plan, Jeongja land consolidation and on-farm development project has 96ha of benefit area and the project was started in 1989 and completed in the spring, 1990. The total project costs were amounted to 1,052 million won and the annual project benefits were estimated at 135.4 million in 1989 constant market prices. On the other hand, the newly estimated project benefits as a part of post evaluation of the project were amounted to 602.1 million won including all the benefits from the market and non-market commodities of the project as mentioned above column. The original IRP(Internal rate of return) of the project was estimated at 15.81%. On the other hand, the IRR of the post evaluation of the project was amounted to 16.83%. In case of including the benefit from the environment public function of paddy field, the SRR(Social Rate of Return) was reached to 38.81% and when we added the benefit from food security of the project, the SRR showed very high rate as 46.41%. In conclusion, the project were verified socio-economically feasible and environmentally sustainable considering the above decision making criteria.

• 대한전기학회논문지
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• 제43권2호
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• pp.197-205
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• 1994

Security of a power system refers to its robustness relative to a set of imminent disturbances (contingencies) during operation. The socially optimal solution for the actuall level of generation/consumption has been well-known spot pricing at shot-run marginal cost. The main disadvantage of this approach arises because serious contingencies occur quite infrequently. Thus by establishing contractual obligations for contingency offering before an actual operation time through decision feedback we can obtain socially optimal level of system security. Under probabilistic precontract pricing the operating point is established at equal incremental cost of the expected short-run and collapse cost of each participant. Rates for power generation/consumption and for an offer to use during a contingency, as well as information on the probability distribution of contingency need for each participant, are derived so that individual optimization will lead to the socially optimal solution in which system security is optimized and the aggregate benefit is maxmized.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 심포지엄 논문집 정보 및 제어부문
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• pp.171-173
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• 2006

Because sensor networks use wireless communication, they are vulnerable to attacks which are more difficult launch in the wired domain. Many wired networks benefit from their inherent physical security properties. It is unlikely that an adversary will dig up the Internet backbone and splice into the line. However, wireless communications are difficult to protect; they are by nature a broadcast medium. In a broadcast medium, adversaries can easily eavesdrop on, intercept, inject, and alter transmitted data. In addition, adversaries are not restricted to using sensor network hardware. We have analyzed the IEEE 802.15.4, ZigBee specification which includes a number of security provisions and options. In this paper, we highlight places where USN security considerations and home network attack scenarios.