Vulnerability Analysis Of Systems Research Articles

Self-Healing in Power Systems: An Approach Using Islanding and Rate of Frequency Decline Based Load Shedding

This paper provides a self-healing strategy to deal with catastrophic events when power system vulnerability analysis indicates that the system is approaching an extreme emergency state. The system is adaptively divided into smaller islands with consideration of quick restoration. Then an adaptive load shedding scheme based on the rate of frequency decline is applied. The proposed scheme is tested on a 179-bus, 20-generator sample system and shows very good performance.

Model-based analysis of configuration vulnerabilities1

Vulnerability analysis is concerned with the problem of identifying weaknesses in computer systems that can be exploited to compromise their security. In this paper we describe a new approach to vulnerability analysis based on model checking. Our approach involves: • Formal specification of desired security properties. An example of such a property is no ordinary user can overwrite system log files. • An abstract model of the system that captures its security-related behaviors. This model is obtained by composing models of system components such as the file system, privileged processes, etc. • A verification procedure that checks whether the abstract model satisfies the security properties, and if not, produces execution sequences (also called exploit scenarios) that lead to a violation of these properties. An important benefit of a model-based approach is that it can be used to detect known and as-yet-unknown vulnerabilities. This capability contrasts with previous approaches (such as those used in COPS and SATAN) which mainly address known vulnerabilities.This paper demonstrates our approach by modelling a simplified version of a UNIX-based system, and analyzing this system using model-checking techniques to identify nontrivial Vulnerabilities. A key contribution of this paper is to show that such an automated analysis is feasible in spite of the fact that the system models are infinite-state systems. Our techniques exploit some of the latest techniques in model-checking, such as constraint-based (implicit) representation of state-space, together with domain-specific optimizations that are appropriate in the context of vulnerability analysis.Clearly, a realistic UNIX system is much more complex than the one that we have modelled in this paper. Nevertheless, we believe that our results show automated and systematic vulnerability analysis of realistic systems to be feasible in the near future, as model-checking techniques continue to improve.

An Incentive Approach to Identifying Financial System Vulnerabilities

This paper underscores the importance of the assessment of incentives of the main agents in a financial system as a key element in the analysis of financial system vulnerability and the surveillance over the financial system. We outline a diagnostic approach for the assessment of incentives. This approach highlights the need for additional research on the relationship between institutional structures and financial vulnerabilities.

An Incentive Approach to Identifying Financial System Vulnerabilities

This paper underscores the importance of the assessment of incentives of the main agents in a financial system as a key element in the analysis of financial system vulnerability and the surveillance over the financial system. We outline a diagnostic approach for the assessment of incentives. This approach highlights the need for additional research on the relationship between institutional structures and financial vulnerabilities.

An Incentive Approach to Identifying Financial System Vulnerabilities

This paper underscores the importance of the assessment of incentives of the main agents in a financial system as a key element in the analysis of financial system vulnerability and the surveillance over the financial system. We outline a diagnostic approach for the assessment of incentives. This approach highlights the need for additional research on the relationship between institutional structures and financial vulnerabilities.

An Approach to Vulnerability Analysis of Complex Industrial Systems

The concept of vulnerability of complex industrial systems is defined and discussed in relation to risk and system survivability. The discussion is illustrated by referring to a number of previous industrial accidents. The various risk factors, or threats, influencing an industrial system's vulnerability are classified and discussed. Both internal and external threats are covered. The general scope of vulnerability analysis is compared to traditional risk analysis approaches and main differences are illustrated. A general procedure for vulnerability analysis in two steps, including building of scenarios and preparation of relevant worksheets, is described and discussed.

An Approach to Vulnerability Analysis of Complex Industrial Systems

The concept of vulnerability of complex industrial systems is defined and discussed in relation to risk and system survivability. The discussion is illustrated by referring to a number of previous industrial accidents. The various risk factors, or threats, influencing an industrial system's vulnerability are classified and discussed. Both internal and external threats are covered. The general scope of vulnerability analysis is compared to traditional risk analysis approaches and main differences are illustrated. A general procedure for vulnerability analysis in two steps, including building of scenarios and preparation of relevant worksheets, is described and discussed.

Vulnerability Analysis of Multiterminal Distribution Systems and Networks

Vulnerability analysis of multiterminal distribution systems and networks when subjected to failure and/or structural perturbations is considered in this paper. A methodology is proposed to allocate and preserve shortages among the various terminals of the system insuring the reliability level. The method is illustrated through application to production distribution system.

Vulnerability and Structural Perturbations of Network Flow Systems

Some concepts and ideas relative to vulnerability analysis of network flow systems subjected to structural perturbations are presented and discussed in this paper. The objective is a decision aiding methodology to system planning and operation. Concepts of system structure invulnerable to perturbations are introduced and computer algorithm is developed for this purpose. Application to production distribution network is performed and the results are reported.