Acceptable Level Of Security Research Articles

Security and QoS Self-Optimization in Mobile Ad Hoc Networks

Network quality-of-service and network security have been considered as separate entities and research in these areas have largely proceeded independently. However, security impacts overall QoS and it is therefore essential to consider both security and QoS together when designing protocols for ad hoc environments as one impacts the other. In this paper we propose a mechanism for a distributed dynamic management system which aims to maximize QoS and/or security while maintaining a minimum user acceptable level of QoS and/or security even as network resource availability change. In order to achieve this objective, we propose three basic frameworks: a policy based plug-in security framework, multi-layer QoS guided routing and a proportional integral derivative (PID) controller. Simulation results indicate the proposed PID optimized security and QoS algorithm produce similar performance as non-secure QoS routing protocols under various traffic loads.

A Protocol for Digital Signature Based on the Elliptic Curve Discrete Logarithm Problem

Digital signature and cryptography algorithms based on the Elliptic Curve Discrete Logarithm Problem (ECDLP) have recently received significant attention by researchers due to their high performances. In this research, a novel protocol for digital signature based on the ECDLP has been presented which in comparison with the other protocols is shown to be more efficient. An acceptable security level of the proposed protocol similar to other protocols is also verified. The performance and the time complexity of the proposed protocol in comparison to previous protocols is analyzed and some advantages outlined.

Adopting a situational requirements engineering approach for the analysis of civil aviation security standards

AbstractThe security of civil aviation, like many human activities, is regulated by a series of international standards and recommended practices. The quality of these documents is a prerequisite to reach an acceptable security level. The EDEMOI project aims at investigating different techniques to analyse these standards. The techniques that we have used, such as Requirements Engineering (RE) and formal methods, have been fruitfully tried and tested in computer science. During the first step of the project, properties were extracted from standards written in natural language and a conceptual model of the underlying system was elaborated. Since none of the existing requirements engineering methods were able to consider the specifics of our project, we turned to situational method engineering, and have defined a new RE method based on this approach. The standard considered in the article is Annex 17 of the Convention of the International Civil Aviation Organization (ICAO). We present several adaptations/extensions to relevant RE techniques necessary to take into account the specific features of our project. Finally, we describe how we have applied this new method to the analysis of Annex 17. Copyright © 2006 John Wiley & Sons, Ltd.

Dynamic key management in sensor networks

Numerous key management schemes have been proposed for sensor networks. The objective of key management is to dynamically establish and maintain secure channels among communicating nodes. Desired features of key management in sensor networks include energy awareness, localized impact of attacks, and scaling to a large number of nodes. A primary challenge is managing the trade-off between providing acceptable levels of security and conserving scarce resources, in particular energy, needed for network operations. Many schemes, referred to as static schemes, have adopted the principle of key predistribution with the underlying assumption of a relatively static short-lived network (node replenishments are rare, and keys outlive the network). An emerging class of schemes, dynamic key management schemes, assumes long-lived networks with more frequent addition of new nodes, thus requiring network rekeying for sustained security and survivability. In this article we present a classification of key management schemes in sensor networks delineating their similarities and differences. We also describe a novel dynamic key management scheme, localized combinatorial keying (LOCK), and compare its security and performance with a representative static key management scheme. Finally, we outline future research directions.

Both Guns and Butter, or Neither: Class Interests in the Political Economy of Rearmament

Astate that is confronted with a grave external threat has three basic options of response, each of which involves certain trade-offs. First, it can strengthen its military. Rearmament, or “internal balancing,” allows it to maintain its diplomatic freedom of action, but its economy may suffer from the strain of accelerating the production of weapons of war. Second, it can join forces with another power. Alliances may obviate the need for an arms buildup, but they carry the risk that the state will be abandoned by its partners or drawn into undesired conflicts. Finally, it can attempt to reconcile with its adversaries by conceding to some of their demands. Appeasement may be the least troublesome way to eliminate a threat, but it is also the most risky because it transfers valued resources to a potential opponent. After weighing these options, the state should choose the policy, or combination of policies, that will provide an acceptable level of security at the lowest overall cost. 1 The foregoing account is appealingly parsimonious, but it captures only part of the story. States are frequently racked by bitter internal debates over how to deal with international pressures, and changes in their political leadership sometimes bring about sudden shifts in their behavior. Of the three strategies described above, rearmament is often the most acutely divisive. It requires a sharp increase in the extraction and mobilization of resources from society, so it can become highly politicized. Some groups will inevitably bear a heavier burden than others, and their discontent may eventually endanger the regime’s hold on power or its ability to prepare for war. To ensure domestic

Information security management: why standards are important

Information security is no longer a domestic issue. In this age of electronic commerce, one company’s information security certainly affects their business partners. For this reason it became imperative that business partners demand an acceptable level of information security from one another. Information security management standards should certainly play a major role in this regard. In this paper, some information security management standards and their applicability will be discussed and put into context.

Information security management (3): the Code of Practice for Information Security Management (BS 7799)

Information security has become very important in most organizations. An acceptable level of information security can only be introduced and maintained if the correct set of security controls, both procedural and technical, is identified, implemented and maintained. The process of identifying the most effective set of security controls can be a very complicated, resource‐intensive process. A number of large British companies have joined forces to establish a Code of Practice for Information Security Management. This document provides guidelines to any organization to identify and introduce a set of controls that will provide an acceptable level of protection to the information resources. This paper briefly discusses the BS 7799 British standard.

Economic dispatch of a small utility with a frequency based reserve policy

The provision of emergency reserve within short time scales, the order of a few seconds, following the loss of an on-line generator is an important part of a small utilities system integrity. It is primarily made up of generator response, demand behaviour and load shedding. Economic dispatch of on-line units must take account of these factors in order to minimise operating cost while maintaining security of supply. Present reserve policies generally take account of generator response only. The minimum frequency reached following a contingency would be a more appropriate measure of system security and would represent an enhanced reserve policy. In this paper a method is described where the economic dispatch for a small utility is performed with a frequency based reserve constraint. A system model is used to evaluate the network behaviour following a contingency and is linked to an optimisation algorithm. A comparison is made with a generator based reserve policy; reduction in system costs while maintaining acceptable levels of security is noted.

Use of irradiation as quarantine treatment for agricultural products infested by mites and insects

The criterion for efficacy of irradiation of agricultural products as a quarantine treatment should be based on the inability to perpetuate the pest at a new location rather than in causing immediate mortality. Sterility in insects and mites is achieved following irradiation of adults and immatures at much lower doses than needed to kill these pests. Irradiation of beans infested by the bean weevil, Acanthoscelides obtectus Say, and grains infested by the grain weevil, Sitophilus granarius (L.), and/or the rice weevil, S . oryzae (L.), at 60 Gy could be the treatment required to produce an acceptable level of quarantine security. For the acarid mites ( Acaridae ), a dose of 250 Gy is suggested. At these dosages, adult survivors of the pest will be present in the treated commodities, but they will not give rise to offspring, and thus this pest would not be able to perpetuate in a new area.

Geotextile In Sewers Rehabilitation

Geotextile In Sewers Rehabilitation