Complexity Explorer Santa Fe Institute

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Game Theory I - Static Games

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9.1 Mixed Strategy Equilibrium in Cyber Security » Quiz Solution

Question: Consider the cyber security game from lesson 9. What happens to the equilibrium probability

that the attacker \attacks" if the cost to the defender of a false alarm increases (Hint: nd the mixed strategy

Nash equilibrium for the game when the false alarm cost is 5 and the false alarm cost is 10. Then compare

the equilibrium attack probabilities.)

Answer: (b)  Increases

Explanation: If this question is dicult, review nding mixed strategy equilibria in lesson

5.

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