Evaluation And Analysis Of Ad Hoc Networks Security Based On Stochastic Game Nets

With the development of Ad Hoc networks, the security issue has been widespread concern. In recent years, scholars have done a lot of studies on the security mechanism of Ad Hoc networks, but a few on the security evaluation and analysis. Evaluation and analysis of Ad Hoc networks security can provide a reference to design the security mechanism of Ad Hoc networks.This paper proposed an evaluation and analysis method of security of Ad Hoc networks based on Stochastic Game Nets(SGN). This method can establish a SGN model of Ad Hoc networks and calculate the Nash equilibrium strategy. After transforming the SGN model into a Continuous-Time Markov Chain (CTMC), the Ad Hoc security can be evaluated and analyzed quantitatively by calculating the stationary probability of CTMC. Finally, Simulation results in this paper based on Matlab show that probability of a successful attack and attack response time has nothing to do with the attack rate, but only with the attack capability and expected utilities; The reliability of Ad Hoc networks isrelated to attack capability, expected utilities and attack rate.