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Enterprise security investment through time when facing different types of vulnerabilities

Author

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  • Yosra Miaoui

    (University of Carthage)

  • Noureddine Boudriga

    (University of Carthage
    University of Western Cape)

Abstract

We propose in this work to use the utility theory to compute the optimal security investment over an investment horizon, considering the typologies and dynamic aspects of vulnerabilities related to the assets of a firm. A regression over a 17-year statistics available in the National Vulnerability Database is performed to predict and forecast the evolution of vulnerabilities’ rates over the investment horizon. Techniques and methodologies are proposed to compute and plan investment tranches over the whole time-horizon, while coping with budget constraints. An analysis is conducted to assess the variation of the optimal investments and the residual risk, taking into account the attitude of decision-makers towards risk. The obtained results show that : a) the optimal amount of investment in information security necessary to counter located attacks increases with the investment horizon for all types of vulnerabilities, but such an increase highly depends on the type of vulnerabilities affecting the firm; b) differently to located attacks, the optimal amount of investment in information security necessary to counter distributed attacks does not always increase with the investment horizon; and c) the optimal amount to invest in security, and the optimum value of the residual risk depend on the decision-maker attitude towards security risk.

Suggested Citation

  • Yosra Miaoui & Noureddine Boudriga, 0. "Enterprise security investment through time when facing different types of vulnerabilities," Information Systems Frontiers, Springer, vol. 0, pages 1-40.
    • Handle: RePEc:spr:infosf:v::y::i::d:10.1007_s10796-017-9745-3
    DOI: 10.1007/s10796-017-9745-3
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    References listed on IDEAS

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