EVALUATION OF CORPORATE NETWORKS SECURITY BASED ON ATTACK GRAPHS
Using attack graphs for the security analysis allows to consider the relationship of individual components and their security parameters. It gives more accurate data to assess the security of the system as a whole comparing with investigation of security properties of the individual nodes. This paper describes the calculation of attack graph, analyze the results and evaluate the effectiveness of existing countermeasures. The model allows dynamic routing, filtering on any network object, NAT. States in attack graph are detailed to <confidentiality, integrity, availability> triad. In constructing the attack graph takes into account both local and network vulnerability. The results of experimental evaluation of system performance presented. For the analysis of 10000 simulated hosts took an average time of about 100 seconds. The number of access control rules (from 500 to 4000 per simulated subnet) were chosen so that the maximum number of filtering rules for devices were about 1,000.