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  • 1. Andersson, Jonas
    et al.
    Johnson, Pontus
    KTH, Tidigare Institutioner, Elektrotekniska system.
    IT Infrastructure Architectures for Electric Utilities: A Comparative Analysis of Description Techniques2000Inngår i: Proceedings of the Annual Hawaii International Conference on System Sciences, ISSN 1530-1605, Vol. 4Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The escalating development of Information Technology enables utilities to reorganize or migrate from their existing disparate software systems towards an integrated Enterprise Software System Infrastructure (ESSI) that embraces the total organization. Integration of software systems is expected to increase competitiveness and to cut costs. However, since utilities' present ESSI is heterogeneous as to type and technical platform, overlapping with regard to both data and functionality, and relying on ad-hoc low-level middleware, integration and management of ESSIs often turn out to be hazardous.This paper presents a comparative analysis of the architectural modeling capabilities of established notations widely used by object-oriented, information engineering and structured methods, applied to typical problems found in utilities' ESSI. Architectural descriptions may be used to visualize technical risks and opportunities in a utility's current and future ESSI, as well as to improve communication between different groups within the utility, e.g. management and technical staff, and between the utility and its vendors of software systems.

  • 2.
    Johansson, Erik
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Assessment of Enterprise Information Security: The Importance of Information Search Cost2006Inngår i: Proceedings of the Annual Hawaii International Conference on System Sciences, ISSN 1530-1605, Vol. 9, s. 219a-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    There are today several methods and standards available for assessment of the level of information security in an enterprise. A problem with these assessment methods is that they neither provide an indication of the amount of effort required to obtain the assessment nor an approximation of this measure's credibility. This paper describes a part of a new method for assessing the level of enterprise information security expresses the credibility of the results in terms of confidence levels and make use of an estimation of the cost of searching for security evidence. Such methods for predicting information search cost of assessments are detailed in the paper. Search cost predictions are used for providing guidance on how to minimize the effort spent on performing enterprise information security assessments. The conclusions are based on a security assessment performed at a large European energy company and a statistical survey among Swedish security experts.

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