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When Information Improves Information Security (Extended version)

By Jens Grossklags, Benjamin Johnson and Nicolas Christin


We investigate a mixed economy of an individual rational expert and several naïve near-sighted agents in the context of security decision making. Agents select between three canonical security actions to navigate the complex security risks of weakest-link, best shot and total effort interdependencies. We further study the impact of two information conditions on agents’ choices. We provide a detailed overview of a methodology to effectively determine and compare strategies and payoffs between the different regimes. To analyze the impact of the different information conditions we propose a new formalization. We define the price of uncertainty as the ratio of the expected payoff in the complete information environment over the payoff in the incomplete information environment

Year: 2009
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