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Mutual Information Applied to Anomaly Detection
Yuliya Kopylova,D. A. Buell,C.-T.Huang,J. Janies 한국통신학회 2008 Journal of communications and networks Vol.10 No.1
Anomaly detection systems play a significant role in protection mechanism against attacks launched on a network. The greatest challenge in designing systems detecting anomalous exploits is defining what to measure. Effective yet simple, Shannon entropy metrics have been successfully used to detect specific types of malicious traffic in a number of commercially available IDS’s. We believe that Renyi entropy measures can also adequately describe the characteristics of a network as a whole as well as detect abnormal traces in the observed traffic. In addition, Renyi entropy metrics might boost sensitivity of the methods when disambiguating certain anomalous patterns. In this paper we describe our efforts to understand how Renyi mutual information can be applied to anomaly detection as an offline computation. An initial analysis has been performed to determine how well fast spreading worms (Slammer, Code Red, andWelchia) can be detected using our technique. We use both synthetic and real data audits to illustrate the potentials of our method and provide a tentative explanation of the results.
Mutual Information Applied to Anomaly Detection
Kopylova, Yuliya,Buell, Duncan A.,Huang, Chin-Tser,Janies, Jeff The Korea Institute of Information and Commucation 2008 Journal of communications and networks Vol.10 No.1
Anomaly detection systems playa significant role in protection mechanism against attacks launched on a network. The greatest challenge in designing systems detecting anomalous exploits is defining what to measure. Effective yet simple, Shannon entropy metrics have been successfully used to detect specific types of malicious traffic in a number of commercially available IDS's. We believe that Renyi entropy measures can also adequately describe the characteristics of a network as a whole as well as detect abnormal traces in the observed traffic. In addition, Renyi entropy metrics might boost sensitivity of the methods when disambiguating certain anomalous patterns. In this paper we describe our efforts to understand how Renyi mutual information can be applied to anomaly detection as an offline computation. An initial analysis has been performed to determine how well fast spreading worms (Slammer, Code Red, and Welchia) can be detected using our technique. We use both synthetic and real data audits to illustrate the potentials of our method and provide a tentative explanation of the results.
ECOTOURISM AND ITS ECONOMIC LINKAGES TO COMMUNITY DEVELOPMENT
Janie Liew-Tsonis 세계문화관광학회 2007 Conference Proceedings Vol.8 No.0
The debate over environmental protection is often about the balance between leaving areas in their natural state or exploiting them for economic development. This choice is often fraught with tension. A conservation strategy of growing importance and popularity is, no doubt, ecotourism. The ever increasing debate of involving local communities in the conservation of natural resources is an urgent and critical task. Ecotourism in its original concept is about environmentally responsible travel to and visitation of relatively undisturbed natural areas, in order to enjoy and appreciate nature and any accompanying features, both past and present that promotes conservation, has low visitor impact and provides for beneficially active socio-economic involvement of local populations (Ceballos-Lascurain, 1992). The term ecotourism is now being used beyond its original conception. This paper will address the question: Is it (eco) tourism for the sake of conservation or is it conservation for the sake of (eco) tourism? Different approaches to the valuation of goods and services can lead to an inconsistent reporting of outcomes. The trouble lies in the different approaches to the valuation of goods and services by the three fundamental stakeholders within the tourism industry; policy makers (Government direction and guidelines), industry (in the business of making money) and the local community (the victims or the beneficiaries?). In tourism ventures within protected areas, economic success and environmental impact are often negatively associated; therefore, protected area managers and tour operators must find a balance between the interest for nature and the impact of outside influence to these natural areas.
A new insight into the use of antihypertensives in glaucoma
Jani, Ashutosh,Goyal, Ramesh K,Mehta, Anita A Kyung Hee Oriental Medicine Research Center 2005 Oriental pharmacy and experimental medicine Vol.5 No.3
People with hypertension (high blood pressure) are at an increased risk of suffering from glaucoma, a condition in which the pressure within the eye increases. Its noted that several antihypertensive are found to be useful in lowering the intraocular pressure, this review throws some light on the use of these antihypertensives as antiglaucoma drugs and about their probable mechanisms.