The Equilibrium Analysis of Organization Information Security Investment Game

Based on Game theory,this paper analyzes the equilibrium of information security investment,and provides a new method to solve the investment quantity of information security.It sets up the information security investment game model of the organizations according to the strategy interdependence,and the relation parameter in the model reflects the game relationship of two organizations,so the equilibrium analysis is made based on reaction function method according to the deferent value of relation parameter.In particular,for the attacker-defender game relationship,it brings forward a proposition of information security investment and makes simulation analysis.The research result not only explains the information security investment in the world,but also provides a good direction of the information security investment quantity for organizations.