• Journal of Convergence for Information Technology
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• v.9 no.8
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• pp.35-44
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• 2019

The purpose of this study is to find out quantitative vulnerability assessment about COTS(Commercial Off The Shelf) O/S based I&C System. This paper analyzed vulnerability's lifecycle and it's impact. this paper is to develop a quantitative assessment of overall cyber security risks and vulnerabilities I&C System by studying the vulnerability analysis and prediction method. The probabilistic vulnerability assessment method proposed in this study suggests a modeling method that enables setting priority of patches, threshold setting of vulnerable size, and attack path in a commercial OS-based measurement control system that is difficult to patch an immediate vulnerability.

• Journal of Space Technology and Applications
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• v.1 no.2
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• pp.256-267
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• 2021

In this paper, the New Space characteristics and response of micro & small satellite, and space industrialization strategy using domestic technologies are described. Recently, micro & small satellites are developed worldwide, including Starlink, having the characteristics of low-cost, light-weight and satellite constellation. Therefore, it is necessary to prepare for the constellation operation by considering the use of Commercial Off-The-Shelf (COTS) parts, satellite weight, shape and mass production. In particular, it is necessary to develop Multi Input Multi Output (MIMO) technology in consideration of the frequency interference during constellation operation, and to prepare and make efforts to secure frequencies in the government. Among the commercial-grade memories of Samsung Electronics and SK Hynix, the space-grade memory field using radiation tolerant memory and the high reliable packaging and space environment test technology has potential as a space industrialization strategy.

• Journal of Aerospace System Engineering
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• v.18 no.2
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• pp.21-28
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• 2024

In light of the rapid development of the space industry, there has been increased attention on small satellites. These satellites rely on components that are considered to have lower reliability compared to larger-scale satellites. As a result, predicting reliability becomes even more crucial in this context. Therefore, this study aims to compare three reliability prediction techniques: MIL-HDBK-217F, RiAC-HDBK-217Plus, and FIDES. The goal is to determine a suitable reliability standard specifically for nano-satellites. Furthermore, we have refined the quality assurance factors of the manufacturing company. These factors have been adjusted to be applicable across various industrial sectors, with a particular focus on the selected FIDES prediction standard. This approach ensures that the scoring system accurately reflects the suitability for the aerospace industry. Finally, by implementing this refined system, we confirm the impact of the manufacturer's quality assurance level on the total failure rate.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.18-20
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• 2012

클라우드 컴퓨팅의 발전으로 지금까지의 In-House 또는 COTS(Commercial Off The Shelf) 방식으로 구축되는 기존의 정보 시스템 구축 방법에 많은 변화가 일어나고 있다. 클라우드 컴퓨팅은 SaaS(SW as a Service), PaaS(Platform as a Service), IaaS(Infra as a Service)를 쉽게 제공하는 플랫폼으로써 많은 사용자가 동시에 접근하는 정보 시스템에서 고 가용성, 성능 만족을 위한 기본 틀을 제공한다. 본 연구는 최신 클라우드 플랫폼 조사를 통해 위성 영상 통합 시스템에 클라우드 컴퓨팅 기술 적용 가능성을 살펴보고 SaaS 기반 위성 영상 통합 시스템 개념 구조를 제시한다.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.25 no.4
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• pp.255-265
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• 2015

Shelter system is applying to weapon systems as usage of performing specific mission with arranging several electronic equipments and operators. Recently the electronic equipments is changing from development products to COTS(commecial off-the-shelf) for demonstrating high performance at low cost. As internal operators of shelter system conduct several missions for specific or long time in this present situation, one of the most important element considering the best combat power is internal noise level. Therefore, I desire to analyze the features and foresee multiple noise level with test for conforming whether requirements of design is met or not in this research paper.

• Journal of Positioning, Navigation, and Timing
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• v.5 no.4
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• pp.165-172
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• 2016

A Global Navigation Satellite System (GNSS), which is typically exemplified by the Global Positioning System (GPS), employs a open signal structure so it is vulnerable to spoofing electronic attack using a similar malicious signal with that used in the GPS. It is necessary to require a spoofing test evaluation environment to check the risk of spoofing attack and evaluate the performance of a newly developed anti-spoofing technique against spoofing attacks. The present paper proposed a simulation method of spoofing environment based on simulator that can be implementable in a test room and analyzed the spoofing simulation performance using commercial GPS receivers. The implemented spoofing simulation system ran synchronized two GPS simulator modules in a single scenario to generate both of spoofing and GPS signals simultaneously. Because the signals are generated in radio frequency, a commercial GPS receiver can be tested using this system. Experimental test shows the availability of this system, and anti-spoofing performance of a commercial GPS receiver has been analyzed.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05a
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• pp.233-238
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• 1997

본 논문에서는 Safety-critical 소프트웨어를 위한 V'||'&'||'V 지침서(guideline) 개발 방법론을 제시한다. 즉, 기존의 산업계 표준인 IEEE Std-1012, IEEE Std-1059에서 논의되고 있는 개념을 근간으로 "독립성(independence)", "소프트웨어 안전성 분석(software safety analysis)", "COTS 평가(evaluation) 기준", "다른 보증(assurance) 조직들간의 관련성(relationship)" 등의 필수 안전 항목들을 추가하여 원전 안전성 시스템(NPP safety system)을 위한 V'||'&'||'V 지침서 개발 방법론을 제시하였다 제시된 방법론에는 V'||'&'||'V 지침서의 범위(scope), 승인기준(acceptance criteria) 부분인 지침서 프레임(guideline framework), V'||'&'||'V activities 및 methods 부분인 타스크(task) entrance 및 exit 기준(criteria), 리뷰 및 감사(review and audit), 테스팅 그리고 V'||'&'||'V material의 QA 레코드(records) 및 형상관리, 소프트웨어 검증 및 확인 계획서(Software Verification and Validation Plan : SVVP) 생성 등의 내용을 기술하고, Safety-critical 소프트웨어 V'||'&'||'V 방법론도 함께 제시하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.358-360
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• 2002

분산 TMO(Time-triggered Message-triggered Object) 객체그룹은 분산 환경에서 실시간 특성을 지원하는 TMO 객체를 그룹으로 하여 TMO 객체에 대한 보안 관리 및 최적 레퍼런스 선택을 위한 부하고려 바인딩 방안과 여러 클라이언트의 요청 작업에 대한 수행 우선순위 스케줄링 방안을 제공하는 모델이다. TINA(Telecommunications Information Networking Architecture)의 객체그룹 개념을 기반으로 실시간 특성을 자체적으로 가지는 TMO 객체를 그룹으로 하여 특정 ORB나 운영체제에 국한되지 않고 COTS(Commercial Off-The-Shelf) 상에서 보장된 실시간 서비스를 제공한다. 이를 위해 분산 TMO 객체 그룹의 구조를 정의하고, TMO 객체의 관리 서비스와 실시간 서비스 관점에서 객체의 기능과 상호작용을 설명한다. 마지막으로, TMO 객체 관리서비스 관점에서 비중복 TMO 객체와 중복 TMO 객체의 레퍼런스 선택과정을 보이며, 부하정보를 고려한 중복 TMO 객체의 최적 레퍼런스 선택의 수행결과를 보이고 검증한다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.15 no.1
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• pp.61-67
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• 2007

The importance and cost of avionics system in the integration of an aircraft is continuously increasing. And we can expect enlarged software portion in the system integration for the more intelligent, reliable, and automated avionics system. Both military and commercial avionics community have moved toward commercial-off-the-shelf(COTS) equipment and open systems architecture not only to increase affordability but also to reduce acquisition cost, shorten development time and risk. The same concept is applied in developing avionics test system used for the avionics system integration test. In this paper, we present important topics in the development of avionics system including real-time operating system, interconnect data bus, software development methodology, software development process, and system integration test.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.63 no.9
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• pp.1248-1252
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• 2014

In this study, we designed a signal processing module using a radiation hardened technology that can be applied to the all measurement sensors inside nuclear power plant containment. Also, for verification that it can be used for high-level radiation environment (Harsh environmental zone inside containment of NPP), we carried out evaluation tests for a designed module using a $Co^{60}$ gamma-ray source up to 12 kGy(Si). And, we had checked radiation hardening level that it has been satisfied up to 12 kGy(Si).