• ETRI Journal
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• 제37권3호
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• pp.512-522
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• 2015

Recent developments in identity-based cryptography (IBC) have provided new solutions to problems related to the security of mobile ad hoc networks (MANETs). Although many proposals to solve problems related to the security of MANETs are suggested by the research community, there is no one solution that fits all. The interdependency cycle between secure routing and security services makes the use of IBC in MANETs very challenging. In this paper, two novel methods are proposed to eliminate the need for this cycle. One of these methods utilizes a key pool to secure routes for the distribution of cryptographic materials, while the other adopts a pairing-based key agreement method. Furthermore, our proposed methods utilize threshold cryptography for shared secret and private key generation to eliminate the "single point of failure" and distribute cryptographic services among network nodes. These characteristics guarantee high levels of availability and scalability for the proposed methods. To illustrate the effectiveness and capabilities of the proposed methods, they are simulated and compared against the performance of existing methods.

• 정보보호학회논문지
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• 제22권4호
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• pp.745-759
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• 2012

본 논문에서는 ZigBee-2007 표준 명세서에 포함된 키 분배 프로토콜의 문제점을 지적하고 이에 대한 개선안을 제시한 Yuksel-Nielson 기법이 키 비동기화 공격에 취약함을 보인다. 또한, Yuksel-Nielson 기법을 개선한 새로운 키 분배 프로토콜을 제안하고 이에 대한 안전성 및 성능분석을 통해서 본 논문에서 제안하는 키 분배 프로토콜의 유효성을 검증한다.

• 한국건축시공학회지
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• 제10권3호
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• pp.71-81
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• 2010

건설R&D 사업은 1994년에 12억원으로 시작하여 2007년에는 1,648억원을 투자하였다. 그동안 연구개발자는 연구성과 실적을 한국건설교통기술평가원에 제출하였고, 이를 기반으로 건설R&D성과 관리가 이루어져 왔다. 건설R&D사업 성과실적이 연구자의 주관적인 분석결과와 보고자료에 의존함으로써 건설R&D 성과의 객관성 및 신뢰성 확보가 어려웠다. 따라서 본 연구는 건설R&D 성과 중 개발기술의 현장적용 비용절감액 분석과 객관적이고 신뢰성있는 경제적 파급효과를 분석하고, 건설R&D의 현장적용 활성화 방안을 마련하였다.

• International Journal of Internet, Broadcasting and Communication
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• 제13권1호
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• pp.1-10
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• 2021

The type approval system for railway vehicle has been in effect since 2016 in order to establish a regular safety management system to secure railway safety and enhance the technological competitiveness of the railway industry, abolished the conventional performance test system through the reform of the Railroad Safety Act in 2012. Until now, there has been appreciated it has been making significant contributions to railway safety and industry of operation and manufacturing companies, taking their place in accordance with the implementation of the system. But there has been no case of quantitative analysis on the effectiveness of the actual system. In this study, in order to examine the full-scale performance of the approval system and quantitatively analyze effectiveness, we identified and defined the relationships with the major elements of the type approval system based on system thinking principle and determined the calculated outcomes to relevant stakeholders. A method of establishing a type approval performance management system that can be grasped, utilized, and adjusted from a point of various stakeholders' views was proposed. This is expected to be more helpful in the implementation of the system, such as improving and applying quantitative effects to analysis by closely reviewing the effects and influencing factors of the type approval system based on the data accumulated through continuous performance management and reflecting to system improvement.

• 인터넷정보학회논문지
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• 제9권6호
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• pp.63-72
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• 2008

최근의 이기종 네트워크 관리에 대한 연구는 단순히 PKI를 이용한 방식으로 이루어지고 있는 실정이며, 실제 이기종 네트워크가 구현되었을때 나타날 수 있는 다양한 형태의 보안 연구가 미흡하다. 따라서 다양한 보안 요구사항과 이를 만족하는 보안 관리 프로토콜 개발은 안전한 이기종 네트워크 환경에 매우 절실히 요구되는 사항이다. 본 논문에서는 기존의 연구에서 고려사항으로 제시되었던 보안적 사항을 만족하는 이기종 네트워크의 안전하고 효율적인 관리 방식을 제시한다. 제시된 방식은 사용자의 프라이버시 보호를 위해 정적인 중앙 개체와 중간 개체를 이용해 상호 인증과정을 수행하고 사용자들간의 통신이 필요한 경우 1-out-2 분실 통신로를 이용해 암호 통신을 수행함으로써 안전성 뿐만 아니라 통신의 효율성까지 고려한 방식이다. 특히, TTP를 기반으로 이기종 네트워크에서 요구되는 다양한 서비스와 관련된 보안과 효율성을 높이기 위한 방식으로 기존 논문에서 전자 상거래에 사용하던 모바일 단말기를 이용해 다양한 서비스를 제공하고 임시 그룹을 설정하여 동적인 환경에 적합한 관리 방식을 제안하였다.

• Journal of Information Processing Systems
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• 제5권4호
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• pp.197-206
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• 2009

We introduce a novel high-level security metrics objective taxonomization model for software- intensive systems. The model systematizes and organizes security metrics development activities. It focuses on the security level and security performance of technical systems while taking into account the alignment of metrics objectives with different business and other management goals. The model emphasizes the roles of security-enforcing mechanisms, the overall security quality of the system under investigation, and secure system lifecycle, project and business management. Security correctness, effectiveness and efficiency are seen as the fundamental measurement objectives, determining the directions for more detailed security metrics development. Integration of the proposed model with riskdriven security metrics development approaches is also discussed.

• 무역학회지
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• 제46권3호
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• pp.185-201
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• 2021

This paper analyzes the penalty tax system under the Customs Act of Korea and examines whether the penalty tax provision violate the constitutional principle of proportionality when imposed on a person who does not made import declaration intentionally or travelers who has not been made an import declaration of their carry-on items. It examines the provisions that adopt a penalty tax as a means to secure the effectiveness of the customs law. In relation to penalty tax, the case studies of the Supreme Court and Constitutional Court of Korea are analyzed by major issues such as the legal nature of the penalty tax, whether the penalty tax is unconstitutional, and the reasons for exemption from the penalty tax. There is no reasonable basis for the high penalty tax imposed on travelers' carry-on items for which import declaration has not been made. It is necessary to unify the penalty tax imposed when an import declaration is not made and the penalty tax on traveler's carry-on items. It is necessary to establish a limit on penalty tax and to create new regulations to exempt or reduce penalty tax when punished by administrative punishment to avoid double jeopardy. It is necessary to effectively secure the effectiveness of the Customs Act by converting the penalty tax into civil penalty that does not presuppose the faithful and accurate performance of tax obligations by the taxpayer. The government revised the penalty tax system in the Customs Act in 2019, but there are still many types of penalty tax and there are elements that are unconstitutional. It seems that the Korean government should lower the burden on the people by improving the system for the penalty tax system.

• 한국전자거래학회지
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• 제20권4호
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• pp.241-256
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• 2015

기업의 정보 보안을 보장하기 위해, 많은 정부가 다양한 보안 관련 대책을 의무화해오고 있다. 하지만 이러한 보안 대책의 실행에 앞서, 이의 잠재적 효과성을 분석하는 연구는 부족한 실정이다. 본 연구는 안전벨트의 착용 법제화가 자동차 사고 사망자 감소에 미치는 효과에 대한 연구를 응용하여, 정부의 다양한 보안 대책의 사전 효과성 평가가 가능한 모형을 개발하는 것을 목적으로 한다. 또한, 인터넷 진흥원의 정보보호실태조사(기업편) 데이터를 개발된 모형에 적용하여 어떠한 보안대책의 법제화가 사회 및 산업 전반의 보안위험을 줄이는데 효과적인지 사전평가를 시행하였다. 그 결과 보안교육의 법제화가 다른 보안대책에 비해 효과적임을 확인하였다.

• 가정과삶의질연구
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• 제15권2호
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• pp.111-126
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• 1997

This study was intended to measure variations in attachment styles and personal relations through the Sociodrama, There were three purposes in this study. The first was to verify the contiuance of attachment between parents and adolescents. The second was to find the difference of personal relations and self-esteem according to the different attachment styles. finally the third was to prove the therapeutic effects of sociodrama. The results were as follows: 1. In terms of attachment style 19% of the subjects were insecurity style 9.5% avoidance style and 74.1% security style. 2. The contents of Sociodrama were the daily happenings between parents and adolescent children and among siblings and friends. Every subject said that the Sociodrama helped him to shape his internal self to understand others and to realize the importance of parental roles. 3. The avoidance group became insecure after the Sociodrama because of their distinctive traits. The secure feelings of security grou also decreased due to their developmental character-individuation. 4. The comparison of the two post-tests revealed that the attachment style of the avoidance group has parents was observed as well. 5. The Sociodrama is assumed to be effective in the changes of adolescents' abnormal and insecure attachment and personal relations into a normal and secure state., In conclusion results of the study verified this assumption of the effectiveness of the sociodrama and it's longterm effects.

• 한국산학기술학회논문지
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• 제11권9호
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• pp.3495-3501
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• 2010

최근 화상회의, 인터넷방송, 온라인 게임등 대규모의 데이터를 여러사용자에게 동시에 전송하는 애플리케이션이 증가함으로 인해 그룹 통신의 중요성 및 활용도가 높아지게 됨에 따라 그에 대한 보안이 중요한 문제로 인식되게 되었다. 멀티캐스트 환경에서 보안성을 제공하기 위해 기존의 하나의 그룹 관리 서버를 통해 키 트리 기반의 프로토콜을 이용한 연구가 많지만, 제안하는 논문에서는 상대적으로 오버헤드가 적은 안전한 그룹키 관리 기법을 제안하고자 한다. 따라서 제안하는 논문에서는 기존의 그룹키 관리기법과의 차별성 및 효율성을 비교하여 우수성을 입증한다.