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Paper details
Number 1 - March 2014
Volume 24 - 2014
A new lightweight method for security risk assessment based on fuzzy cognitive maps
Piotr Szwed, Paweł Skrzyński
Abstract
For contemporary software systems, security is considered to be a key quality factor and the analysis of IT security risk
becomes an indispensable stage during software deployment. However, performing risk assessment according to methodologies and standards issued for the public sector or large institutions can be too costly and time consuming. Current
business practice tends to circumvent risk assessment by defining sets of standard safeguards and applying them to all
developed systems. This leads to a substantial gap: threats are not re-evaluated for particular systems and the selection
of security functions is not based on risk models. This paper discusses a new lightweight risk assessment method aimed
at filling this gap. In this proposal, Fuzzy Cognitive Maps (FCMs) are used to capture dependencies between assets, and
FCM-based reasoning is performed to calculate risks. An application of the method is studied using an example of an
e-health system providing remote telemonitoring, data storage and teleconsultation services. Lessons learned indicate that
the proposed method is an efficient and low-cost approach, giving instantaneous feedback and enabling reasoning on the
effectiveness of the security system.
Keywords
security, risk assessment, telemedicine, fuzzy cognitive maps