Rational Choice of Security Measures Via Multi-parameter Attack Trees

  • Ahto Buldas
  • Peeter Laud
  • Jaan Priisalu
  • Märt Saarepera
  • Jan Willemson
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4347)

Abstract

We present a simple risk-analysis based method for studying the security of institutions against rational (gain-oriented) attacks. Our method uses a certain refined form of attack-trees that are used to estimate the cost and the success probability of attacks. We use elementary game theory to decide whether the system under protection is a realistic target for gain-oriented attackers. Attacks are considered unlikely if their cost is not worth their benefits for the attackers. We also show how to decide whether the investments into security are economically justified. We outline the new method and show how it can be used in practice by going through a realistic example.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Ahto Buldas
    • 1
    • 2
    • 3
  • Peeter Laud
    • 1
    • 2
  • Jaan Priisalu
    • 4
  • Märt Saarepera
    • 5
  • Jan Willemson
    • 1
    • 2
  1. 1.CyberneticaTallinnEstonia
  2. 2.University of TartuTartuEstonia
  3. 3.Tallinn University of TechnologyTallinnEstonia
  4. 4.HansapankTallinnEstonia
  5. 5.Independent researcher 

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