In this paper we examine the potential bene ts of dedicated backup route(s) to provide survivability for ATM group communications. Specifically we examine the feasibility of providing survivability using working multipoint routes with disjoint dedicated backup multipoint routes where the multipoint routes are setup using either Virtual Rings, shared multicast trees, or VC Mesh groups. We introd...

VOLUME 12, NUMBER 1, 2000 LINCOLN LABORATORY JOURNAL 65 I  encompasses many aspects of security and reliability for computers and networks. Information survivability is more than just preventing computer break-ins and protecting secret information from prying eyes. Systems must be robust; they must be able to continue to operate despite successful attacks that may comprom...

In this paper we consider vulnerable systems which can have different states corresponding to different combinations of available elements composing the system. Each state can be characterized by a system 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 surviva...

Survivability refers to keeping a system partially or fully operational when one or more of its components fail. Survivability in telecommunication networks is crucial, as failure of a network component can potentially bring down the whole communication network, as happened in some real-world cases. Adding redundant network components increases the survivability of a network, but cost of the ne...

In this paper we present an environment for evaluating self-healing mechanisms in survivable networks. The work is based on the thesis that system level requirements of integrity and availability can be inherently conflicting, and that the type and level of defence in each particular network should be determined in relation to the particular network’s characteristics. The study shows that defin...

In considering the use of digestive enzyme supplements, it is not uncommon to question the survivability of unprotected enzymes through the digestive process. Pancreatic enzymes, available as both drugs and dietary supplements, are known to require enteric coating to prevent permanent denaturing by gastric acidity. Fortunately, not all enzymes require these coatings to survive the gastric envir...

Of all modern aircraft, helicopters are the least survivable due to their low altitude and relatively low speed flight profiles compared with jet aircraft, and their high acoustic and radar signatures. These are inherent limitations of rotary wing aircraft, which cannot be easily or affordably designed out. Formal survivability analysis is centred on two components: the first being susceptibili...

The past few years have shown a need for fundamentally new approaches to the security and survivability of large scale networked systems. Infrastructures and other modern systems pose problems that arise from many factors: partial information, complexity of combined interactions of very large numbers of human and automated participants, ubiquitous access, loss of centralized administrative cont...