Introduction The Willow architecture provides a comprehensive architectural approach to the provision of survivability [8] in critical information networks. It is based on the notion that survivability of a network requires reconfiguration at both the system and the application levels. The Willow notion of reconfiguration is very general, and the architecture provides reconfiguration mechanisms...

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Critical information systems (CISs) cover vast number of applications and are now an essential part of our dayto-day life. Any damage to such a system or loss of information due to malicious attacks or system failures can cause serious consequences to society and individuals. Therefore, it is important to maintain the survivability of the systems and make timely decisions on system repair, if n...

Stochastic methods are commonly used for dependability evaluation. In the mid 1970’s, stochastic evaluation was proposed for combined performance/dependability evaluation, called performability evaluation. Extending reliability evaluation to include performance related behaviors presented new challenges, most notably due to the large difference in time scale of performanceand dependability-rela...

When a projectile perforates the armor of a vehicle, the residual projectile entering the vehicle is accompanied by a much wider cloud of behind-armor debris (BAD) generated by stress wave interactions. BAD plays an important role in the evaluation of survivability of crew and components in a vehicle under fire. Survivability/vulnerability analysis codes (e.g., MUVES) require an input of BAD ch...

Aircraft survivability is a key metric that contributes to the overall system effectiveness of military aircraft as well as to a lower life cycle cost. The aircraft designer, thus, must have a complete and thorough understanding of the interrelationships between the components of survivability and the other traditional disciplines as well as how they affect the overall life cycle cost of the ai...

This article develops a novel approach and algorithmic tools for the modeling and survivability analysis of networks with heterogeneous nodes, and examines their application to space-based networks. Space-based networks (SBNs) allow the sharing of spacecraft on-orbit resources, such as data storage, processing, and downlink. Each spacecraft in the network can have different subsystem compositio...

Network survivability, which reflects the ability of a network to continue to function during and after natural or man-made disturbances, is a crucial aspect for any kind communication. It goes beyond security and fault tolerance to focus on delivery of essential services and rapid recovery of full services when situation improves. Wireless and space networks have the challenge of survivability...

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In this paper, we examine different aspects of the survivability in IP networks by experimentation on several current IP backbone network topologies. Maintaining service continuity even under failures requires redundancy in terms of connectivity and capacity. We analyze the cost of survivability for protection against single node failures for traditional OSPF based recovery as well as current M...