• 제목/요약/키워드: five security key

검색결과 46건 처리시간 0.027초

OpenSSL을 이용한 키쌍(공개키·개인키) 충돌율 분석 (Key-pair(Public key, Private key) conflict analysis using OpenSSL)

  • 이광형;박정효;전문석
    • 한국산학기술학회논문지
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    • 제15권8호
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    • pp.5294-5302
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    • 2014
  • 공개키 기반 기술의 발전은 전자정부, 전자금융, 전자결제 등 다양한 서비스를 가능하게 하였으며, 완벽한 안전성을 가지고 있는 것으로 평가된다. 하지만, 최근 허트블리드 버그 등 공개키 기반 이용 기술에 대한 취약점이 지속적으로 발견되고 있다. 본 논문에서는 공개키 기반구조의 안전성 및 신뢰성을 검증하기 위해, OpenSSL을 이용하여 키쌍의 충돌율을 분석하였다. 실험은 OpenSSL을 이용하여 5개의 사설인증기관을 생성하고, 각 사설인증기관에서 200만개의 인증서를 생성해 총 1,000만개의 인증서를 생성하여 키쌍 충돌 여부를 분석하였다. 실험은 다음과 같은 과정으로 수행되었다. Openssl을 이용하여 5개의 사설인증기관 생성, 각 사설인증기관에서 200만개의 인증서를 생성, 총 1,000만개의 인증서를 생성하여 키쌍 충돌 여부를 분석하였다. 실험 결과 1,000만건 중 35,000건, 즉 0.35%의 확률로 공개키 개인키가 충돌을 발생하였다. 이는 전자상거래, 보안서버 등 다양한 분야에서 충분한 위협이 될 수 있는 요소이다. 향후에는 공개키 기반기술의 위협요소를 제거하기 위해 난수생성기, 큰 소수 선택 문제 등 깊이 있는 연구를 진행할 것이다.

국가건설과정에서 키르기스스탄의 국가안보와 자주국방의 딜레마 (A Dilemma of Kyrgyzstan Goes Through the Process of Nation-Building: National Security Problems and Independent National Defense Capability)

  • 김선래
    • 국제지역연구
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    • 제14권4호
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    • pp.27-52
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    • 2011
  • 키르기스스탄은 다자간 안보시스템에 의존한 군사안보 확보와 등거리 외교를 통한 국가안보를 국가정책의 주요 목표로 두고 추진하고 있다. 부연하자면, 중앙아시아의 소국으로서 자주권의 확립과 국가발전이라는 과제를 추진하기 위하여 나름의 군사안보정책을 통하여 해결점을 찾으려 한다는 것이다. 그러나 한 국가가 단순히 외교와 외부의 안보시스템에 의존하여 국가의 자주성과 발전을 담보할 수는 없을 것이다. 이 논문에서는 키르기스스탄의 국방력과 군사력을 해부해 봄으로써 키르기스스탄이 최소한의 자위적 차원의 국방력을 가지고 있는가를 살펴보는 것과 국방력 증강에 대한 가능성을 살펴보는 것이 중요하다고 본다. 해양세력과 대륙세력, 그 양대 세력의 신-그레이트 게임속에서 등거리외교와 다자간 안보협력기구를 통하여 국가자주성을 확보해 나가는 균형 외교전략의 한계와 미래를 살펴봄으로서 앞으로의 키르기스스탄 독립과 자주 문제를 파악, 예측 해 보는 것이 본 논문의 목적이다.

Breaking the Silence: Revealing the limits of Preschool Teachers' Cultural and Linguistic Competence (CLC) in Saudi Arabia

  • Allehyani, Sabha Hakim
    • International Journal of Computer Science & Network Security
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    • 제22권8호
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    • pp.222-234
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    • 2022
  • Background: Within the framework of the new Saudi Vision 2030, the education system is keen on developing Early Childhood (EC) curricula to meet the needs of children from diverse cultural and linguistic backgrounds, in addition to preparing teachers to be the main driving forces in this field. To achieve these strategic goals, the professional development of teachers has taken the lead in terms of their continuous professional achievements. Purpose: The recent study tended to explore the promotion of Cultural and Linguistic Competence (CLC) of teachers in preschool institutions in different sectors in the Kingdom of Saudi Arabia (KSA) include public, private and international. Method: In the current study, (n=300) of preschool female teachers, who had experience teaching children from diverse language and cultural backgrounds, participated voluntarily by filling out the exploratory questionnaire. It was designed on a five-point Likert scale. The credibility of the scale and the validity of the questionnaire were ascertained, and the content for which it was designed verified in terms of the purposes of the current investigation. Results: The results revealed that preschool female teachers in the private preschool settings have a higher level of CLC compared to those who were teaching in public and international preschools in KSA. In the private sector, preschool female teachers showed create abilities to provide culturally responsive environments for diverse students, applying various communication styles, and showing proper attitudes and values toward diversity. Implication: The current study provided key implications for policy makers regarding the promotion of CLC for all teachers, particularly preschool in government settings in KSA. It contributed to revealing the cultural awareness of preschool teachers' values and attitudes toward diversity.

Hierarchy of Shopping Experience at Indian Malls: A Conceptual Model using Interpretive Structural Modelling

  • Prashar, Sanjeev;Singh, Harvinder;Sarma, Pappu Raja Sekhara
    • 유통과학연구
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    • 제14권2호
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    • pp.5-12
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    • 2016
  • Purpose - The present study examines the interrelationship between various components constituting shopping experience in the context of the Indian shopping malls. Research design, data, and methodology - Extracting components of shopping experience from the literature review, the study used Interpretive Structural Modelling (ISM) to propose a conceptual model. The study adopted a mixed methods research involving theoretical constructs from past research, qualitative assessment of relationship between the constructs and imposing definite order and direction to qualitative relations based on mathematical computations. Results - Proposed model indicates that the five components of shopping experience (ambience, physical infrastructure, convenience, marketing focus and safety and security) do not converge directly into shopping experience. Rather, they operate following a hierarchy of influences in which marketing focus plays the role of the initiator. Conclusions - This model points at the order of preference of different components of shopping experience and can be a useful guide for retail industry, especially mall developers and supermarket/hypermarket, may use the findings in key decisions about development of physical infrastructure, which are based on marketing focus.

경량 블록 암호 LBlock에 대한 차분 오류 공격 (Differential Fault Analysis on Lightweight Block Cipher LBlock)

  • 정기태;이창훈
    • 한국항행학회논문지
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    • 제16권5호
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    • pp.871-878
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    • 2012
  • 64-비트 블록 암호 LBlock은 무선 센서 네트워크 환경과 같이 제한된 환경에 적합하도록 설계된 경량 블록 암호이다. 본 논문에서는 LBlock에 대한 차분 오류 공격을 제안한다. 랜덤 니블 오류 주입 가정에 기반을 둔 이 공격은 평균 5개의 랜덤 니블 오류와 $2^{25}$의 전수조사를 이용하여, LBlock의 비밀키를 복구한다. 이는 일반적인 수 초 내에 가능함을 의미한다. 본 논문의 공격 결과는 기제안된 LBlock에 대한 차분 오류 공격 결과보다 더 효율적이다.

Exploratory Analysis of AI-based Policy Decision-making Implementation

  • SunYoung SHIN
    • International Journal of Internet, Broadcasting and Communication
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    • 제16권1호
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    • pp.203-214
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    • 2024
  • This study seeks to provide implications for domestic-related policies through exploratory analysis research to support AI-based policy decision-making. The following should be considered when establishing an AI-based decision-making model in Korea. First, we need to understand the impact that the use of AI will have on policy and the service sector. The positive and negative impacts of AI use need to be better understood, guided by a public value perspective, and take into account the existence of different levels of governance and interests across public policy and service sectors. Second, reliability is essential for implementing innovative AI systems. In most organizations today, comprehensive AI model frameworks to enable and operationalize trust, accountability, and transparency are often insufficient or absent, with limited access to effective guidance, key practices, or government regulations. Third, the AI system is accountable. The OECD AI Principles set out five value-based principles for responsible management of trustworthy AI: inclusive growth, sustainable development and wellbeing, human-centered values and fairness values and fairness, transparency and explainability, robustness, security and safety, and accountability. Based on this, we need to build an AI-based decision-making system in Korea, and efforts should be made to build a system that can support policies by reflecting this. The limiting factor of this study is that it is an exploratory study of existing research data, and we would like to suggest future research plans by collecting opinions from experts in related fields. The expected effect of this study is analytical research on artificial intelligence-based decision-making systems, which will contribute to policy establishment and research in related fields.

Application of peak based-Bayesian statistical method for isotope identification and categorization of depleted, natural and low enriched uranium measured by LaBr3:Ce scintillation detector

  • Haluk Yucel;Selin Saatci Tuzuner;Charles Massey
    • Nuclear Engineering and Technology
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    • 제55권10호
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    • pp.3913-3923
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    • 2023
  • Todays, medium energy resolution detectors are preferably used in radioisotope identification devices(RID) in nuclear and radioactive material categorization. However, there is still a need to develop or enhance « automated identifiers » for the useful RID algorithms. To decide whether any material is SNM or NORM, a key parameter is the better energy resolution of the detector. Although masking, shielding and gain shift/stabilization and other affecting parameters on site are also important for successful operations, the suitability of the RID algorithm is also a critical point to enhance the identification reliability while extracting the features from the spectral analysis. In this study, a RID algorithm based on Bayesian statistical method has been modified for medium energy resolution detectors and applied to the uranium gamma-ray spectra taken by a LaBr3:Ce detector. The present Bayesian RID algorithm covers up to 2000 keV energy range. It uses the peak centroids, the peak areas from the measured gamma-ray spectra. The extraction features are derived from the peak-based Bayesian classifiers to estimate a posterior probability for each isotope in the ANSI library. The program operations were tested under a MATLAB platform. The present peak based Bayesian RID algorithm was validated by using single isotopes(241Am, 57Co, 137Cs, 54Mn, 60Co), and then applied to five standard nuclear materials(0.32-4.51% at.235U), as well as natural U- and Th-ores. The ID performance of the RID algorithm was quantified in terms of F-score for each isotope. The posterior probability is calculated to be 54.5-74.4% for 238U and 4.7-10.5% for 235U in EC-NRM171 uranium materials. For the case of the more complex gamma-ray spectra from CRMs, the total scoring (ST) method was preferred for its ID performance evaluation. It was shown that the present peak based Bayesian RID algorithm can be applied to identify 235U and 238U isotopes in LEU or natural U-Th samples if a medium energy resolution detector is was in the measurements.

한국의 방위산업 발전전략 연구 - 기술보호정책을 중심으로 - (South Korea's Defense Industry Development Strategy - Focusing on Technology Protection Policy -)

  • 김금률
    • 융합보안논문지
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    • 제24권1호
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    • pp.83-93
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    • 2024
  • 러시아-우크라이나 전쟁으로 글로벌 방위산업 시장의 패러다임이 변화하면서 한국의 첨단 재래식 무기체계가 전 세계의 주목을 받고 있다. 2023년 한국은 세계 무기수출 9위를 기록했으며, 2027년까지 세계 4위의 방산수출국 도약을 목표로 방위산업 혁신을 추진 중이다. 방위산업은 오랜 시간과 막대한 예산이 필요한 국가 전략산업이며 방산기술은 국방선진화와 국가경제에 큰 영향을 미치는 핵심기술이다. 최근 5년간 한국은 첨단기술의 해외 유출로 인해 약 25조원 규모의 경제적 손실을 입었으며, 방산기술의 유출 방지를 위한 제도적 개선이 시급한 상황이다. 따라서 본 연구에서는 인도-태평양 지역의 핵심 행위자인 미국, 중국, 일본 3국이 방위산업의 기술 보호를 위해 추진하고 있는 법과 제도를 고찰하여 한국의 방위산업 기술보호를 위한 발전전략을 제시하였다. 방위산업을 한국의 유망한 미래산업으로 육성해 나가기 위해서는 기술주권의 확보와 연계하여 빠르게 진화하고 있는 첨단 과학기술의 발전속도에 대응하고, 관련 법과 제도의 개선을 통해 국가 핵심기술인 방위산업기술을 보호해야 한다.

E-Navigation 서비스 제공을 위한 통신망 아키텍처의 설계 (A Design of Communication Network Architecture for E-Navigation Services)

  • 정중식;김선영
    • 한국항해항만학회지
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    • 제32권1호
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    • pp.37-45
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    • 2008
  • 최근 IMO의 항해안전전문위원회(NAV) 통신작업반을 중심으로 E-Navigation(E-Nav) 전략개발에 관한 연구가 진행되고 있다. E-Nav 전략개발을 위한 통신망 아키텍처의 설계는 선교시스템의 표준 및 미래 항해 및 해양통신 장비에 관한 국가 R&D 프로젝트 방향을 결정하는 중요한 부분이다. 본 연구는 E-Nav 이용자 요구분석을 통하여 항해안전을 향상시키고 해상운송의 부가적인 이익을 가져다 줄 수 있는 E-Nav 서비스를 도출하고 통신망 기준모델을 설계하는데 목적을 두고 있다. 본 연구에서는 E-Nav 서비스를 크게 안전 및 보안, 해양기상, 조난, 비즈니스, 인포테인먼트(infotainment)의 5가지 분야로 나누고, 각 분야 별로 요구되는 E-Nav 서비스를 도출하였다. 그 결과로서 도출된 E-Nav 서비스 지원을 위한 통신망 아키텍처를 제안하였다.

District Energy Use Patterns and Potential Savings in the Built Environment: Case Study of Two Districts in Seoul, South Korea

  • Lee, Im Hack;Ahn, Yong Han;Park, Jinsoo;Kim, Shin Do
    • Asian Journal of Atmospheric Environment
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    • 제8권1호
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    • pp.48-58
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    • 2014
  • Energy efficiency is vital to improve energy security, environmental and social sustainability, and economic performance. Improved energy efficiency also mitigates climate change by lowering greenhouse gas (GHG) emissions. Buildings are the single largest industrial consumer of energy and are therefore key to understanding and analyzing energy consumption patterns and the opportunities for saving energy at the district level in urban environments. This study focused on two representative boroughs in the major metropolitan area of Seoul, South Korea as a case study: Gandong-gu, a typical residential district, and Jung-gu, a typical commercial district. The sources of the energy supplied to the boroughs were determined and consumption patterns in different industry sectors in Seoul used to identify current patterns of energy consumption. The study analyzed the energy consumption patterns for five different building categories and four different sectors in the building using a bottom-up energy modeling approach. Electricity and gas consumption patterns were recorded for different building categories and monthly ambient temperatures in the two boroughs. Finally, a logarithmic equation was developed to describe the correlation between commercial activity and cooling energy intensity in Jung-gu, the commercial district. Based on these results, recommendations are made regarding the current energy consumption patterns at the district level and government energy policies are suggested to reduce energy consumption and, hence, greenhouse gas emissions, in both commercial and residential buildings.