Jamming Attacks on Remote State Estimation in Cyber-Physical Systems: A Game-Theoretic Approach.

We consider security issues in Cyber-Physical Systems (CPSs). A sensor node communicates with a remote estimator through a wireless channel which may be jammed by an external attacker. With energy constraints for both the sensor and the attacker, the interactive decision making process of when to send and when to attack is studied. We formulate a game-theoretical framework and prove that the optimal strategies for both sides constitute a Nash equilibrium. The derivation of the optimal strategies for both sides is also provided with examples.