Network survivability—the ability to maintain operation when one or a few network components fail—is indispensable for present-day networks. In this paper, we characterize three main components in establishing network survivability for an existing network, namely, (1) determining network connectivity, (2) augmenting the network, and (3) finding disjoint paths. We present a concise overview of n...

vii 1 Survivable System Concepts 1 2 Service Traces for Survivability Specification 5 2.1 Essential-Service Workflows 5 2.2 Essential-Service Traces 6 2.3 Relational Specification of Trace Components 6 2.4 Computational Survivability 7 3 Intrusion Traces for Adverse Environment Specification 9 3.1 Intruder Workflows Organized Into Attack Trees 10 3.2 Attack Patterns Organized Into Attack Profil...

Current Byzantine-fault-tolerant survivable systems [5, 6] rely on strong theoretical properties to guarantee survivability. Evaluations of such systems generally focus on the performance overhead of the mechanisms in the fault-free case: a metric that, in itself, is not a good evaluator of survivability. This dearth of metrics makes the objective comparison of the survivability of different im...

Mission requirements for planned NASA and DOD spacecraft often include designing for survivability. The threats to the survivability of a spacecraft can be either manmade (e.g., ASATs, space debris) or natural (e.g., radiation belts, micrometeoroids). An overview of the principal kinds of manmade threats and the implications on the design of space power systems are discussed. In general, it is ...

For a lineage to survive over long time periods, it must sometimes change. This has given rise to the term evolvability, meaning the tendency to produce adaptive variation. One lineage may be superior to another in terms of its current standing variation, or it may tend to produce more adaptive variation. However, evolutionary outcomes depend on more than standing variation and produced adaptiv...

Bioaerosols are common biological factors in work environments, which require routine use of filtering respiratory protective devices (FRPDs). Currently, no studies link humidity changes in the filter materials of such devices, during use, with microorganism survivability. Our aim was to determine the microclimate inside FRPDs, by simulating breathing, and to evaluate microorganism survivabilit...

In today’s technology, the essential property for wireless communication network is to exhibit as a dependable network. The dependability network incorporates the property like availability, reliability and survivability. Although these factors are well taken care by protocol for wired network, still there exists huge lack of efficacy for wireless network. Further, the wireless access network i...

This paper considers systems that can have different states corresponding to different combinations of available elements constituting the system. Each state can be characterized by a performance rate, which is the quantitative measure of a system’s ability to perform its task. Both the impact of external factors (attack) and internal causes (failures) affect system survivability, which is dete...