A double oracle algorithm for zero-sum security games on graphs

In response to the Mumbai attacks of 2008, the Mumbai police have started to schedule a limited number of inspection checkpoints on the road network throughout the city. Algorithms for similar security-related scheduling problems have been proposed in recent literature, but security scheduling in networked domains when targets have varying importance remains an open problem at large. In this paper, we cast the network security problem as an attacker-defender zero-sum game. The strategy spaces for both players are exponentially large, so this requires the development of novel, scalable techniques.