{"type":"ScholarlyArticle","title":"Security Games with Information Leakage: Modeling and Computation","authors":[{"name":"Haifeng Xu","slug":"haifeng-xu","given":"Haifeng","family":"Xu","affiliation":""},{"name":"Albert Xin Jiang","slug":"albert-xin-jiang","given":"Albert Xin","family":"Jiang","affiliation":""},{"name":"Arunesh Sinha","slug":"arunesh-sinha","given":"Arunesh","family":"Sinha","affiliation":""},{"name":"Zinovi Rabinovich","slug":"zinovi-rabinovich","given":"Zinovi","family":"Rabinovich","affiliation":""},{"name":"Shaddin Dughmi","slug":"shaddin-dughmi","given":"Shaddin","family":"Dughmi","affiliation":""},{"name":"Milind Tambe","slug":"milind-tambe","given":"Milind","family":"Tambe","affiliation":""}],"abstract":"Most models of Stackelberg security games assume that the attacker only knows the defender's mixed strategy, but is not able to observe (even partially) the instantiated pure strategy. Such partial observation of the deployed pure strategy — an issue we refer to as information leakage — is a significant concern in practical applications. While previous research on patrolling games has considered the attacker's real-time surveillance, our settings, therefore models and techniques, are fundamentally different. More specifically, after describing the information leakage model, we start with an LP formulation to compute the defender's optimal strategy in the presence of leakage. Perhaps surprisingly, we show that a key subproblem to solve this LP (more precisely, the defender oracle) is NP-hard even for the simplest of security game models. We then approach the problem from three possible directions: efficient algorithms for restricted cases, approximation algorithms, and heuristic algorithms for sampling that improves upon the status quo. Our experiments confirm the necessity of handling information leakage and the advantage of our algorithms.","doi":null,"url":"https://ijcai.org/proceedings/2015/101","pdf":"https://ijcai.org/proceedings/2015/0101.pdf","markdown":"https://ijcai.org/proceedings/2015/101.md","bibtex":"https://ijcai.org/proceedings/2015/bibtex/101","volume":{"slug":"2015","title":"Proceedings of the Twenty-Fourth International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2015","url":"https://ijcai.org/proceedings/2015/","year":2015,"location":"Buenos Aires, Argentina","dates":"25–31 July 2015","editors":"Qiang Yang and Michael Wooldridge","isbn":"978-1-57735-738-4","publisher":"International Joint Conferences on Artificial Intelligence","doi_prefix":""},"section":"Game Theory","track":"Main Track","number":101,"pages":{"first":674,"last":679},"keywords":[],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}