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Quantifying Risks in Service Networks: Using Probability Distributions for the Evaluation of Optimal Security Levels

Ackermann, Tobias and Buxmann, Peter (2010):
Quantifying Risks in Service Networks: Using Probability Distributions for the Evaluation of Optimal Security Levels.
In: Proceedings of the 16th Americas Conference on Information Systems (AMCIS) 2010, In: Americas Conference on Information Systems (AMCIS), Lima, Peru, August 12-15, 2010, [Online-Edition: http://aisel.aisnet.org/amcis2010/284/],
[Conference or Workshop Item]

Abstract

The increasing costs and frequency of security incidents require organizations to apply proper IT risk management. At the same time, the expanding usage of Service-oriented Architectures fosters software systems composed of cross-linked services. Therefore, it is important to develop risk management methods for these composite systems. In this paper, we present a straightforward model that can be used to quantify the risks related to service networks. Based on the probability distribution of the costs which are related to risks, it is possible to make proper investment choices using individual risk preferences. The attractiveness of investment alternatives and different levels of security can be measured with various characteristics like the expected value of the costs, the Value-at-Risk or more complex utility functions. Through performance evaluations we show that our model can be used to calculate the costs’ probability density function for large scale networks in a very efficient way. Furthermore, we demonstrate the application of the model and the algorithms with the help of a concrete application scenario. As a result, we improve IT risk management by proposing a model which supports decision makers in comparing alternative service scenarios and alternative security investments in order to find the optimal level of IT security.

Item Type: Conference or Workshop Item
Erschienen: 2010
Creators: Ackermann, Tobias and Buxmann, Peter
Title: Quantifying Risks in Service Networks: Using Probability Distributions for the Evaluation of Optimal Security Levels
Language: English
Abstract:

The increasing costs and frequency of security incidents require organizations to apply proper IT risk management. At the same time, the expanding usage of Service-oriented Architectures fosters software systems composed of cross-linked services. Therefore, it is important to develop risk management methods for these composite systems. In this paper, we present a straightforward model that can be used to quantify the risks related to service networks. Based on the probability distribution of the costs which are related to risks, it is possible to make proper investment choices using individual risk preferences. The attractiveness of investment alternatives and different levels of security can be measured with various characteristics like the expected value of the costs, the Value-at-Risk or more complex utility functions. Through performance evaluations we show that our model can be used to calculate the costs’ probability density function for large scale networks in a very efficient way. Furthermore, we demonstrate the application of the model and the algorithms with the help of a concrete application scenario. As a result, we improve IT risk management by proposing a model which supports decision makers in comparing alternative service scenarios and alternative security investments in order to find the optimal level of IT security.

Title of Book: Proceedings of the 16th Americas Conference on Information Systems (AMCIS) 2010
Divisions: 01 Department of Law and Economics
01 Department of Law and Economics > Betriebswirtschaftliche Fachgebiete
01 Department of Law and Economics > Betriebswirtschaftliche Fachgebiete > Information Systems
Event Title: Americas Conference on Information Systems (AMCIS)
Event Location: Lima, Peru
Event Dates: August 12-15, 2010
Date Deposited: 26 Oct 2010 07:09
Official URL: http://aisel.aisnet.org/amcis2010/284/
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