• Title/Summary/Keyword: survivability

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An Algorithm for Calculating Flow-based Network Survivability (흐름량을 고려한 네트워크 생존도 계산방법에 관한 연구)

  • 명영수;김현준
    • Journal of the Korean Operations Research and Management Science Society
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    • v.26 no.3
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    • pp.65-77
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    • 2001
  • Survivability of a network is one of the most important issues in designing present-day communication networks. the k-edge survivability of a given network is defined as the percentage of total traffic surviving the worst case failure of k edges. Although several researches calculated k-edge survivability on small networks by enumeration, prior research has considered how to calculate k-edge survivability on large networks. In this paper, we develop an efficient procedure to obtain lower and upper bounds on the k-edge survivability of a network.

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Design and Verification of Survivability Equipment for Utility Helicopter (기동헬기 생존장비 설계 및 입증)

  • Lee, Byoung-Hwa;Kim, Sung-Woo;Oh, Woo Seop;Koo, Yeon-Deog
    • Journal of the Korea Institute of Military Science and Technology
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    • v.16 no.2
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    • pp.146-153
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    • 2013
  • Visual information and aural warning of independent aircraft survivability equipment increase the pilot workload and limit the effective countermeasures. For increase the aircraft survivability, Integrated design of survivability display and aural warning need to consider pilot intuitions. If pilot aware the threat by intuition, evade or escape from the threat using the countermeasures equipment, it will increase the survivability. This paper describe the design and verification of for Utility Helicopter survivability equipment.

A Survey on Network Survivability Models (네트워크 생존도 모형 개관)

  • Myung, Young-Soo
    • Journal of Korean Institute of Industrial Engineers
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    • v.34 no.2
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    • pp.181-189
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    • 2008
  • Survivability of a network is one of the most important issues in designing present-day communication networks. For the past few decades, a lot of researches have proposed the mathematical models to evaluate the survivability of networks. In this paper, we attempt to survey such researches and classify them based on how these researches measure the survivability of a network.

Integrated survivability assessment given multiple penetration hits (다중 관통 피격에 따른 함정 통합 생존성 분석 절차)

  • Kim, Kwang-Sik;Lee, Jang-Hyun
    • Journal of Ocean Engineering and Technology
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    • v.28 no.1
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    • pp.69-76
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    • 2014
  • Survivability assessments and vulnerability reductions are required in warship design. A warship's survivability is assessed by its susceptibility, vulnerability, and recoverability. In this paper, an integrated survivability assessment for a warship subjected to multiple hits is introduced. The methodology aims at integrating a survivability assessment into an early stage of warship design. The hull surface is idealized using typical geometries for RCS (Radar Cross Section) detection probability and susceptibility. The Vulnerability is evaluated by using the shot-line. The recoverability is estimated using a survival time analysis. This enables the variation of survivability to be assessed. Several parameters may be varied to determine their effects on the survivability. The susceptibility is assessed by the probability of detecting the radar cross section of the subject and the probability of being hit based on a probability density function. The vulnerability is assessed by the kill probability based on the vulnerable area of critical components, according to the component's layout and redundancy. Recoverability is assessed by the recovery time for damaged critical components.

An Agent based Modeling and Simulation for Survivability Analysis of Combat System (전투 시스템 생존성 분석을 위한 에이전트 기반 모델링 및 시뮬레이션)

  • Hwang, Hun-Gyu;Kim, Hun-Ki;Lee, Jang-Se
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.16 no.12
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    • pp.2581-2588
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    • 2012
  • Survivability of combat system is changed by various facts in dynamic battle field. Existing survivability analysis programs for a combat system analyze statically survivability for combat system in spite of dynamic battle environment. To overcome this limitation, we propose an agent-based modeling and simulation method for dynamic survivability analysis of the combat system. To do this, we have adopted DEVS formalism, SES/MB framework and agent technology for modeling components of the combat system and crews. The proposed method has advantages of being able to analyze not only a static survivability of the combat system but also a dynamic survivability of combat system by applying responses of crews in battle field.

Survivability Evaluation Model in Wireless Sensor Network using Software Rejuvenation

  • Parvin, Sazia;Thein, Thandar;Kim, Dong-Seong;Park, Jong-Sou
    • Convergence Security Journal
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    • v.8 no.1
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    • pp.91-100
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    • 2008
  • The previous works in sensor networks security have focused on the aspect of confidentiality, authentication and integrity based on cryptographic primitives. There has been no prior work to assess the survivability in systematic way. Accordingly, this paper presents a survivability model of wireless sensor networks using software rejuvenation for dual adaptive cluster head. The survivability model has state transition to reflect status of real wireless sensor networks. In this paper, we only focus on a survivability model which is capable of describing cluster head compromise in the networks and able to switch over the redundant cluster head in order to increase the survivability of that cluster. Second, this paper presents how to enhance the survivability of sensor networks using software rejuvenation methodology for dual cluster head in wireless sensor network. We model and analyze each cluster as a stochastic process based on Semi Markov Process (SMP) and Discrete Time Markov Chain (DTMC). The proof of example scenarios and numerical analysis shows the feasibility of our approach.

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A Simplified Assessment Method and Application for Consideration of Survivability in Spatial Layout Design at the Early Design Stage of Naval Vessels (함정 초기 설계 단계에서 레이아웃 설계 시 생존성을 고려하기 위한 간이 평가 방법과 애플리케이션)

  • Jung, Jin-Uk;Jeong, Yong-Kuk;Ju, SuHeon;Shin, Jong Gye;Kim, JongChul
    • Journal of the Society of Naval Architects of Korea
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    • v.55 no.1
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    • pp.9-21
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    • 2018
  • Survivability of naval vessels is defined as the ability to perform functions and missions in a combat environment. Survivability has close relationship with the spatial layout of naval vessels. In order to maximize survivability, it must be considered from the early stage of design. However the existing concept of survivability was intended to be applied to unit vessels. So it was not suitable for assessment of spatial layout results at the early stage of design. In this paper, a simplified assessment method which can evaluate the spatial layout considering the survivability in the early stage of design has been proposed. For this, assessment layers were defined on survivability components such as susceptibility, vulnerability, and recoverability. Assessment layers of each component were overlapped to deduce a survivability layer of spatial layout alternatives. In addition, the proposed method and optimization algorithm were used to derive optimal spatial layout alternatives considering survivability.

A Novel Method for Survivability Test Based on End Nodes in Large Scale Network

  • Ming, Liang;Zhao, Gang;Wang, Dongxia;Huang, Minhuan;Li, Xiang;Miao, Qing;Xu, Fei
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.2
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    • pp.620-636
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    • 2015
  • Survivability is a necessary property of network system in disturbed environment. Recovery ability is a key actor of survivability. This paper concludes network survivability into a novel composite metric, i.e. Network Recovery Degree (NRD). In order to measure this metric in quantity, a concept of Source-Destination Pair (SD Pair), is created to abstract end-to-end activity based on end nodes in network, and the quality of SD Pair is also used to describe network performance, such as connectivity, quality of service, link degree, and so on. After that, a Survivability Test method in large scale Network based on SD pairs, called STNSD, is provided. How to select SD Pairs effectively in large scale network is also provided. We set up simulation environment to validate the test method in a severe destroy scenario and evaluate the method scalability in different large scale network scenarios. Experiment and analysis shows that the metric NRD correctly reflects the effort of different survivability strategy, and the proposed test method STNSD has good scalability and can be used to test and evaluate quantitative survivability in large scale network.

An Approach to a Quantitative Evaluation of U-Service Survivability Reflecting Cyber-terrorism (사이버테러를 고려한 U-Service 생존성의 정량적 평가 방안)

  • Kim, Sung-Ki
    • Convergence Security Journal
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    • v.11 no.6
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    • pp.67-72
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    • 2011
  • A system that provides a ubiquitous service is a networked system that has to overcome their circumstances that the service survivability is weak. the survivability of a networked system is defined as an ability of the system that can offer their services without interruption, regardless of whether components comprising the system are under failures, crashes, or physical attacks. This paper presents an approach that end users can obtain a quantitative evaluation of U-service survivability to reflect intended cyber attacks causing the networked system to fall into byzantine failures in addition to the definition of the survivability. In this paper, a Jini system based on wireless local area networks is used as an example for quantitative evaluation of U-service survivability. This paper also presents an continuous time markov chain (CTMC) Model for evaluation of survivability of U-service that a Jini system provides, and an approach to evaluate the survivability of the U-service as a blocking probability that end users can not access U-services.

A Study on Survivability Management Model for Information Systems Over Internet (인터넷에서 정보시스템의 생존성 관리 모델)

  • Kim, Hwang-Rae;Park, Jin-Sub
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.7 no.6
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    • pp.1185-1193
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    • 2006
  • The next generation networked information system over unbounded internet is open to various network attacks and incidents, so many users suffer from damage and financial loss. In this paper we propose a survivability management model to evaluate the tradeoffs between the cost of defence mechanisms for information systems with weighted service and the resulting expected survivability after a network attack or occurrence of incidents. By varying the level of defence in the simulation, we examine how survivability changes according to the defense level. We derive a cost/survivability and weighted service/survivability curve that managers can use to decide on the appropriate level of defense for the network system of their organizations.

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