AHP is an analytical multi-criteria technique used to resolve decision making problems for complex and heterogeneous systems. Basically, the idea is to find out what are the factors involved and then constitute a hierarchy model according to the association of the factors. The advantages of AHP method are to combine qualitative and quantitative analysis, and then reduce the subjectivity in order to make the evaluation more reliable and to design an
automatic process. Previously, AHP has been used in many fields to select alternatives from a set of candidates (social problem, economy or management for instance). Based on its advantages, we decided to adopt AHP in security level assessment for the SecMan security classification process.