• 한국정보통신학회논문지
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• 제19권1호
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• pp.244-250
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• 2015

국방과 관련하여 주어진 임무를 수행하는 전투 시스템은 외부 위협에 의한 피해를 회피하여야 하며, 만약 피해를 입더라도 이를 최소화시켜 계속적인 임무 수행이 가능해야 한다. 이러한 이유로 외부 위협에 대한 전투 시스템의 취약점을 분석하고, 이를 개선하여 전투 시스템의 생존성을 향상시키기 위한 목적의 모델링 및 시뮬레이션 기반의 연구가 진행되고 있다. 본 논문에서는 전투 시스템 생존성 분석을 위하여 3차원 관통 해석 프로그램을 개발하는 것에 관한 내용을 다룬다. 이를 위해, 전투 시스템 중 전차를 대상으로 외부 위협과 방호 성능에 따른 관통 해석식을 적용하였다. 실험을 위하여 3차원 CAD 기반으로 전차를 단순화하여 모델링하고, 시나리오에 따른 실험을 통해 개발한 프로그램이 설정된 장갑과 외부 위협의 속성에 따른 관통 해석 및 결과의 시각화가 가능함을 보였다.

• 한국정보보호학회:학술대회논문집
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• 한국정보보호학회 2002년도 종합학술발표회논문집
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• pp.459-462
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• 2002

기존의 개별적 보안 사항에 맞추어 서비스를 제공하는 여러 보안 솔루션들이 급변하는 네트워크 환경에 적절한 대응을 못하고 있는 실정이다. 단순한 보안 문제에 대한 특화된 솔루션에 의존을 해왔기 때문에 해당 네트워크와 시스템 환경에 맞는 적절한 대응책을 마련하지 못하고 있으며, 그 이전에 취약성 분석조차도 미비하기 때문이다. 그러므로 적절한 취약성 분식에 대한 방법론 제시가 필수적이다. 사이버 공격과 방어 메커니즘 분석을 통해 얻어지는 시스템의 각 요소들을 Modeling하고, 시뮬레이션 기법을 이용하여 취약성을 평가하고 다시 재구성하여 적용해보는 취약성 분석 방법을 기술하고자 한다. 다양한 공격들로부터 전체 시스템을 보호하고, Survivability를 증가시키기 위해서는 취약성 분석이 기반이 되어야 하며, 그 시스템은 취약성에 의한 결함이나, 공격에 의한 장애에도 불구하고, 고유의 기능을 완전하게 제공하기 위해서 지속적으로 수행되는 속성을 유지해야 할 것이다.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제13권7호
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• pp.535-539
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• 2007

이동 ad-hoc 전술통신망에서 대체경로 라우팅 알고리즘의 적합성 및 생존성(survivability) 연구를 수행하였다. 이 통신망의 신호 방식은 공통선 신호 방식을 사용하며, 경로선정 방식은 Flood search routing을 사용하였으며, Restricted flooding과 Hybrid routing 에 대해 연결 성능을 분석하였다. 분석 결과 대체경로 라우팅을 함으로써 좀 더 낮은 차단확률(Blocking Probability)을 기대할 수 있었으며, 기존의 Flood search routing 의 연결 성능이 우수하여 생존성이 높은 것으로 판단되었다.

• 한국국방경영분석학회지
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• 제24권2호
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• pp.1-16
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• 1998

Aircraft combat survivability(ACS) can be defined here as the probability of an aircraft to accomplish a given mission and not to be killed by enemy threats. The purpose of this thesis is to obtain analytically the combat survivability of the military aircraft according to the enemy and operation environment. Five factors under which a mission is being carried out are considered in this study. These factors are types and performance of enemy threats, aircraft susceptibility, aircraft vulnerability, ECM(electronic counter measures) capability, and pilot's capability. The model constructed in this study would be a useful tool to analyze ACS based on analytical method. It is also able to provide a better input data for wargaming simulation and present a criterion on determining optimal sorties for aircraft's air-to-ground mission.

• International Journal of Aeronautical and Space Sciences
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• 제12권4호
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• pp.396-402
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• 2011

Aircraft combat survivability is an essential factor in the design of combat aircrafts that operate in an enemy air defense area. The combat aircrafts will be confronted with anti-aircraft artillery and/or surface-to-air missiles (SAM) from the ground, and their survivability can be divided into two categories: susceptibility and vulnerability. This article studies the prediction of susceptibility in the case of a one-on-one engagement between the combat aircraft and a surface-based threat. The weighted score method is suggested for the prediction of susceptibility parameters, and Monte Carlo simulations are carried out to draw qualitative interpretation of the susceptibility characteristics of combat aircraft systems, such as the F-16 C/D, and the hypersonic aircraft, which is under development in the United States, versus ground threat from the SAM SA-10.

• ETRI Journal
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• 제24권2호
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• pp.117-130
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• 2002

Due to its salient features, the optical burst switch is becoming a key technology for the optical Internet. Within this technology, the survivability issue in the optical Internet has to be addressed because a simple failure causes severe damage to the huge amount of data carried in optical fiber. In this paper, we introduce a restoration procedure that can provide good survivability in the optical burst switch (OBS)-based optical Internet. OBS restoration can survive various types of network failure while maintaining good network performance. We propose novel restoration mechanisms, namely, "temporary Label Switched Path (LSP)" and "bossy LSP," to enhance restoration time and network utilization. The simulation results verify that the proposed OBS restoration achieves good network performance and provides good network connectivity as well.

• Journal of Ship and Ocean Technology
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• 제9권1호
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• pp.38-46
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• 2005

Survivability improvement method for naval ship design has been continually developed. In order to design naval ships considering survivability, it is demanded that designers should establish reasonable damage conditions by air explosion. Explosion may induce local damage as well as global collapse to the ship. Therefore possible damage conditions should be realistically estimated in the design stage. In this study the authors used ALE technique, one of the structure-fluid interaction techniques, to simulate air explosion and investigated survival capability of damaged naval ships. Lagrangian-Eulerian coupling algorithm, equation of the state for explosive and air, and simple calculation method for explosive loading were also reviewed. It is shown that air explosion analysis using ALE technique can evaluate structural damage after being attacked. This procedure can be applied to the real structural design quantitatively by calculating surviving time and probability.

• 대한안전경영과학회지
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• 제13권2호
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• pp.103-113
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• 2011

This research is to select a path planning algorithm to maximize survivability for Unmanned Aerial Vehicle(UAV). An UAV is a powered pilotless aircraft, which is controlled remotely or autonomously. UAVs are currently employed in many military missions(surveillance, reconnaissance, communication relay, targeting, strike etc.) and a number of civilian applications(communication service, broadcast service, traffic control support, monitoring, measurement etc.). In this research, a mathematical programming model is suggested by using MRPP(Most Reliable Path Problem) and verified by using ILOG CPLEX. A path planning algorithm for UAV is selected by comparing of SPP(Shortest Path Problem) algorithms which transfer MRPP into SPP.

• 한국항공운항학회지
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• 제16권1호
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• pp.29-36
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• 2008

The vulnerability of aircraft, especially rotary wing aircraft, has been an ongoing issue since their advent in combat operations during the 1940s. In this paper, representative sensors for survivability of those aircraft in modern battlefield are surveyed and top level requirements and parameters are defined. Also problems of multi-sensor alignment on modern agile and flexible platform are discussed and several techniques such as static alignment and transfer alignment are introduced.

• 한국정보보호학회:학술대회논문집
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• 한국정보보호학회 2003년도 동계학술대회
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• pp.141-145
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• 2003

We propose the model of Software Rejuvenation methodology, which is applicable for survivability. Software rejuvenation is a proactive fault management technique and being used in fault tolerant systems as a cost effective technique for dealing with software faults. Survivability focuses on delivery of essential services and preservation of essential assets, even systems are penetrated and compromised. Thus, our objective is to detect the intrusions in a real time and survive in face of such attacks. As we deterrent against an attack in a system level, the Intrusion tolerance could be maximized at the target environment. We address the optimal time to execute ad hoc software rejuvenation and we compute it by using the semi Markov process. This is one way that could be really frustrated and deterred the attacks, as the attacker can't make their progress. This Software Rejuvenation method can be very effective under the assumption of unknown attacks. In this paper, we compute the optimum time to perform an ad hoc Software Rejuvenation through intrusions.