CERIAS Weekly Security Seminar – Purdue University
Ninghui Li, Membership Privacy: A Unifying Framework For Privacy Definitions
Data collected by organizations and agencies are a key resourcein today's information age. The use of sophisticated data mining techniquesmakes it possible to extract relevant knowledge that can then be used for avariety of purposes, such as research, developing innovative technologiesand services, intelligence and counter-terrorism operations, and providinginputs to public policy making. However the disclosure of those data posesserious threats to individual privacy. In this talk, we present a novelprivacy framework that we call Membership Privacy, which prevents theadversary from significantly increasing its ability to conclude that anentity is in the input dataset. Membership privacy is parameterized by afamily of distributions that captures the adversary's prior knowledge. Thepower and flexibility of the proposed framework lies in the ability tochoose different distribution families to instantiate membership privacy.Many privacy notions in the literature are equivalent to membership privacywith interesting distribution families, including differential privacy,differential identifiability, and differential privacy under sampling. Theframework also provides a principled approach to developing new privacynotions under which better utility can be achieved than what is possibleunder differential privacy. This is joint work with Wahbeh Qardaji, DongSu, Yi Wu, and Weining Yang. About the speaker: Ninghui Li is an Associate Professor of Computer Science atPurdue University. He received a Bachelor's degree from the University ofScience and Technology of China in 1993 and a Ph.D. in Computer Science fromNew York University in 2000. Before joining the faculty of Purdue in 2003,he was a Research Associate at Stanford University Computer ScienceDepartment for 3 years. Prof. Li's research interests are in security andprivacy, and has published over 100 referred papers in this area. Prof. Liis an ACM Distinguished Scientist and IEEE Senior member. In June 2013, hewas elected Vice Chair of ACM Special Interest Group on Security, Audit andControl (SIGSAC). He served on the editorial board of the VLDB Journal from2007 to 2013, and is current on the editorial board of IEEE Transactions onDependable and Secure Computing (TDSC).
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