Regional Cooperative Signal Opportunistic Security Game Model

Security issues have always been the attention of all countries in the world.In addition to planned terrorist attack,opportunistic crime is a challenge faced by many security agencies.Game theory helps security departments deploy and allocate resources to protect targets from attacks.However,there are many limitations in traditional opportunistic security game theory for diverse opportunistic crime patterns.Many opportunistic attackers have a cooperative relationship,so they can share the benefits and observation knowledge of the defender,and produce more stable decisions for themselves.However,the existing model does not model the cooperative relationship of opportunistic attackers,and due to the huge state transition space limitation,the efficiency and scalability of the existing model are very weak.In the third chapter of this paper,a new regional cooperative opportunistic attacker model is proposed.By using the state compression abstract method,the participants in the game are transfer based on the region,thereby reducing the state space of the existing opportunistic game model.Later,the bounded rational model of opportunistic attackers is improved,and factors such as cooperation gains and shared information are introduced into the model.Finally,with the help of experiments,the attacker model proposed in this paper is better than the traditional opportunistic attacker model in the choice of state transition strategy.The existing opportunistic security game theory cannot solve the strategy of this smarter attacker,and the strategy of the defender is very single.In the fourth chapter,this paper creatively combines the signal game theory with the opportunistic security game model,and considers the defense strategy under the defender’s signal mechanism.Defender can strategically generate some signals to interfere with the transfer and spread of opportunistic attackers,the experiments have proved that the defender strategy under the signal mechanism is significantly better than the defender strategy without signal effect in dealing with opportunistic attackers.