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Information Security Risk Assessment — A Practical Approach with a Mathematical Formulation of Risk
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 103 - Number 8 |
| Year of Publication: 2014 |
| Authors: Mohamed Ghazouani, Sophia Faris, Hicham Medromi, Adil Sayouti |
10.5120/18097-9155
|
Mohamed Ghazouani, Sophia Faris, Hicham Medromi, Adil Sayouti . Information Security Risk Assessment — A Practical Approach with a Mathematical Formulation of Risk. International Journal of Computer Applications. 103, 8 ( October 2014), 36-42. DOI=10.5120/18097-9155
Abstract
Risk management methodologies, such as Mehari, Ebios, CRAMM and SP 800-30 (NIST) use a common step based on threat, vulnerability and probability witch are typically evaluated intuitively using verbal hazard scales such as low, medium, high. Because of their subjectivity, these categories are extremely difficult to assign to threats, vulnerabilities and probability, or indeed, to interpret with any degree of confidence. The purpose of the paper is to propose a mathematical formulation of risk by using a lower level of granularity of its elements: threat, probability, criteria used to determine an asset's value, exposure, frequency and existing protection measure.
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