... all possible security measures. In practice,tradeoffs have to be made between security and usabil-ity, between security and performance, and between secu-rity and cost. Moreover, a network may ... administrators can usethese results to enhance the security of their network. Keywords: Stochastic games – Nonlinear programming– Network security 1 IntroductionGovernment agencies, banks, ... this model to thoseKong-wei Lye, Jeannette M. Wing: Game strategies in network security Fig. 1. A network examplein our network example. In Sect. 3, we explain the con-cept of a Nash equilibrium...