Privacy-Preserving Data Aggregation over Participatory Networks
Department of Computer Science
University of Illinois at Urbana-Champaign
Wednesday, March 26, 2008
SAGE 4101 - 4:00 p.m. to 5:00 p.m.
Refreshments at 3:30 p.m.
The emerging participatory networked embedded systems, designed for
aggregated information collection with fine-granularity, are viewed as
new generation of pervasive computing systems. We expect both social
and economic impact of participatory networks. Applications of
participatory networks are likely to deal with highly sensitive or
private information. Hence, one of the pressing concerns of users is
the confidentiality of the data collected about them. Therefore, we
need a way to collect aggregated information while at the same time
preserve data privacy.
In this talk, I will present two privacy-preserving data aggregation
schemes for additive aggregation functions. The first scheme,
Cluster-based Private Data Aggregation (CPDA), leverages clustering
protocol and algebraic properties of polynomials. It has the advantage
of incurring less communication overhead. The second scheme,
Slice-Mix-AggRegaTe (SMART), builds on slicing techniques and the
associative property of addition. It has the advantage of incurring
less computation overhead. The goal of this work is to bridge the gap
between collaborative data collection and privacy preservation of
individual data. I assess the two schemes by privacy-preservation
efficacy, communication overhead, and data aggregation accuracy.
Since both schemes trade message overhead for privacy, I will propose
efficiency enhancement method for privacy preserving data aggregation
when message overhead is a big concern. Finally, I will conclude this
talk by discussing my future plan.
Wenbo He is a Ph.D. candidate in Department of Computer Science, at the
University of Illinois at Urbana-Champaign, where she is supervised by
Professor Klara Nahrstedt. Wenbo's research focuses on pervasive
computing, security and privacy issues in networked embedded systems.
Wenbo received the Mavis Memorial Fund Scholarship Award from College
of Engineering of UIUC in 2006, and the C. W. Gear Outstanding Graduate
Award in 2007 from the Department of Computer Science at UIUC. She is
also a recipient of the Vodafone Fellowship from 2005 to 2008, and the
NSF TRUST Fellowship in 2007. Wenbo got her M.S. from the Department
of Electrical and Computer Engineering at UIUC and M.Eng. from the
Department of Automation at Tsinghua University, Beijing, China, in
2000 and 1998 respectively. She received her B.S. from the Department
of Automation at the Harbin Engineering University, Harbin, China in 1995.
During August 2000 to January 2005, Wenbo was a software engineer in
Cisco Systems, Inc.
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Last updated: September 7, 2005