Privacy Lunch – Wed, June 26 2013 (10.45am)

Speaker: Prof. Lorrie Cranor (CMU)

Title: Privacy Nudges for Social Media

Anecdotal evidence and scholarly research have shown that a significant portion of Internet users experience regrets over their online disclosures. To help individuals avoid regrettable online disclosures, we employed lessons from behavioral decision research and soft paternalism to design mechanisms that "nudge" users to consider the content and context of their online disclosures more carefully. We developed three privacy nudges for Facebook, focusing on visual cues about the audience, time delays, and feedback mechanisms. We tested the nudges in a three-week exploratory field trial with 21 Facebook users, and conducted 13 follow-up interviews. A slightly larger, longer-term field trial of a new nudge developed based on the results of the first field trial is currently under way. Our system logs, results from exit surveys, and interviews suggest that privacy nudges could be a promising way to prevent regrettable disclosures. In this talk I will discuss our research on regrettable disclosures on social networks, and how we used what we learned to develop nudges for Facebook. I will discuss our field trials and future directions for this research. This is joint work with Yang Wang, Pedro Leon, Alessandro Acquisti, Norman Sadeh, Xiaoxuan Chen, and Kevin Scott.

Speaker Bio:
Lorrie Faith Cranor ( is an Associate Professor of Computer Science and of Engineering and Public Policy at Carnegie Mellon University where she is director of the CyLab Usable Privacy and Security Laboratory (CUPS) and co-director of the MSIT-Privacy Engineering masters program. She is also a co-founder of Wombat Security Technologies, Inc. She has authored over 100 research papers on online privacy, usable security, and other topics. She has played a key role in building the usable privacy and security research community, having co-edited the seminal book Security and Usability (O'Reilly 2005) and founded the Symposium On Usable Privacy and Security (SOUPS). She also chaired the Platform for Privacy Preferences Project (P3P) Specification Working Group at the W3C and authored the book Web Privacy with P3P (O'Reilly 2002). She has served on a number of boards, including the Electronic Frontier Foundation Board of Directors, and on the editorial boards of several journals. She was previously a researcher at AT&T-Labs Research and taught in the Stern School of Business at New York University.

Privacy Lunch will be held at PARC

Notice the time change: 10.45am