Roxana Geambasu
Associate Professor of Computer Science at Columbia University
(first-name@cs.columbia.edu)
Associate Professor of Computer Science at Columbia University
(first-name@cs.columbia.edu)
Pierre Tholoniat, Kelly Kostopoulou, Mosharaf Chowdhury, Asaf Cidon, Roxana Geambasu, Mathias Lécuyer, Junfeng Yang. ``Packing Privacy Budget Efficiently.’’ In Proceedings of the ACM European Conference on Computer Systems (EuroSys), Rotterdam, Netherlands, March 2025. [arxiv copy]
Pierre Tholoniat, Kelly Kostopoulou, Peter McNeely, Prabhpreet Singh Sodhi, Anirudh Varanasi, Benjamin Case, Asaf Cidon, Roxana Geambasu, Mathias Lécuyer. ‘‘Cookie Monster: Efficient On-device Budgeting for Differentially-Private Ad-Measurement Systems.’’ In Proceedings of the ACM Symposium on Operating Systems Principles (SOSP), Austin, Texas, November 2024. [arxiv copy]
Kelly Kostopoulou, Pierre Tholoniat, Asaf Cidon, Roxana Geambasu, and Mathias Lecuyer. ‘‘Turbo: Effective Caching in Differentially-Private Databases.’’ In Proceedings of the ACM Symposium on Operating Systems Principles (SOSP), Koblenz, Germany, October 2023. [PDF]; [extended version]; [project website]
Rachel Cummings, Damien Desfontaines, David Evans, Roxana Geambasu, Yangsibo Huang, Matthew Jagielski, Peter Kairouz, Gautam Kamath, Sewoong Oh, Olga Ohrimenko, Nicolas Papernot, Ryan Rogers, Milan Shen, Shuang Song, Weijie Su, Andreas Terzis, Abhradeep Thakurta, Sergei Vassilvitskii, Yu-Xiang Wang, Li Xiong, Sergey Yekhanin, Da Yu, Huanyu Zhang, and Wanrong Zhang. ‘‘Advancing Differential Privacy: Where We Are Now and Future Directions for Real-World Deployment.’’ Harvard Data Science Review, January 2024. [link]
Matthew Jagielski, Stanley Wu, Alina Oprea, Jonathan Ullman, and Roxana Geambasu. ‘‘How to combine membership-inference attacks on multiple updated models.’’ In Proceedings of the Privacy-Enhancing Technologies Symposium (PETS), 2023. [PDF]
Tao Luo, Mingen Pan, Pierre Tholoniat, Asaf Cidon, Roxana Geambasu, and Mathias Lecuyer. ‘‘Privacy Budget Scheduling and Orchestration.’’ In Proceedings of the USENIX Symposium on Operating Systems Design and Implementation (OSDI), July 2021. [PDF]; [extended version]; [project website]
Mathias Lecuyer, Riley Spahn, Kiran Vodrahalli, Roxana Geambasu, and Daniel Hsu. ‘‘Privacy Accounting and Quality Control in the Sage Differentially Private Machine Learning Platform.’’ In Proceedings of the ACM Symposium on Operating Systems Principles (SOSP), Ontario, Canada, October 2019. PDF
Mathias Lecuyer, Riley Spahn, Kiran Vodrahalli, Roxana Geambasu, and Daniel Hsu. ‘‘Privacy Accounting and Quality Control in the Sage Differentially Private Machine Learning Platform.’’ In ACM SIGOPS Operating Systems Review (OSR), volume 53, issue 1, July 2019. PDF
Mathias Lecuyer, Vaggelis Atlidakis, Roxana Geambasu, Daniel Hsu, and Suman Jana. PixelDP: ‘‘Certified Robustness to Adversarial Examples with Differential Privacy.’’ In Proceedings of the IEEE Security and Privacy Symposium (IEEE S&P), San Francisco, CA, May 2019. [PDF] (corrects error in proceedings version). https://github.com/columbia/pixeldp.
Mathias Lecuyer, Riley Spahn, Roxana Geambasu, Tzu-Kuo Huang, and Siddhartha Sen. ‘‘Enhancing Selectivity in Big Data.’’ IEEE Security and Privacy Symposium Magazine, 2018. Invited paper. [PDF].
Mathias Lecuyer, Riley Spahn, Roxana Geambasu, Tzu-Kuo Huang, and Siddhartha Sen. ‘‘Pyramid: Enhancing Selectivity in Big Data Protection with Count Featurization.’’ In Proceedings of the IEEE Security and Privacy Symposium (IEEE S&P), San Jose, CA, May 2017. [PDF], [Arxiv Extended Tech Report], https://columbia.github.io/selective-data-systems/.
Florian Tramer, Vaggelis Atlidakis, Roxana Geambasu, Daniel Hsu, Jean-Pierre Hubaux, Mathias Humbert, Ari Juels, and Huang Lin. ‘‘FairTest: Discovering Unwarranted Associations in Data-Driven Applications.’’ In Proceedings of the IEEE European Symposium on Security and Privacy (EuroS&P), Paris, France, April 2017. [PDF], systemsy technical report, http://columbia.github.io/fairtest/.
Vaggelis Atlidakis, Jeremy Andrus, Roxana Geambasu, Dimitris Mitropoulos, and Jason Nieh. ‘‘POSIX Abstractions in Modern Operating Systems: The Old, the New, and the Missing.’’ In Proceedings of the European Conference on Computer Systems (EuroSys), London, UK, April 2016. [PDF], https://columbia.github.io/libtrack.
Yoshihisa Abe, Roxana Geambasu, Kaustubh Joshi, and Mahadev Satyanarayanan. ‘‘Urgent Virtual Machine Migration with Enlightened Post-copy.’’ In Proceedings of the Conference of Virtual Execution Environments (VEE), Atlanta, GA, April 2016. [PDF].
Mathias Lecuyer, Riley B. Spahn, Giannis Spiliopoulos, Augustin Chaintreau, Roxana Geambasu, and Daniel Hsu. ‘‘Sunlight: Fine-grained Targeting Detection at Scale with Statistical Confidence.’’ In Proceedings of the ACM Conference on Computer and Communications Security (CCS), Denver, Colorado, October 2015. [PDF]. https://columbia.github.io/sunlight.
Nicolas Viennot, Mathias Lecuyer, Jonathan Bell, Roxana Geambasu, and Jason Nieh. ‘‘Synapse: New Data Integration Abstractions for Agile Web Application Development.’’ In Proceedings of the European Conference on Computer Systems (EuroSys), Bordeaux, France, April 2015. [PDF]. https://github.com/nviennot/synapse.
Riley Spahn, Jonathan Bell, Michael Lee, Sravan Bhamidipati, Roxana Geambasu, Gail Kaiser. ‘‘Pebbles: Fine-Grained Data Management Abstractions for Modern Operating Systems.’’ In Proceedings of the USENIX Operating Systems Design and Implementation (OSDI), Broomfield, CO, October 2014. [PDF].
Mathias Lecuyer, Guillaume Ducoffe, Francis Lan, Andrei Papancea, Theofilos Petsios, Riley Spahn, Augustin Chaintreau, and Roxana Geambasu. “XRay: Increasing the Web’s Transparency with Differential Correlation.” In Proceedings of the USENIX Security Symposium, San Diego, CA, August 2014. [PDF]. Website: http://matlecu.github.io/xray/. NYT Bits article.
Yoshihisa Abe, Roxana Geambasu, Kaustubh Joshi, H. Andres Lagar-Cavilla, and Mahadev Satyanarayanan. “vTube: Efficient Streaming of Virtual Appliances Over Last-Mile Networks.” In Proceedings of the ACM Symposium on Cloud Computing (SOCC), Santa Clara, CA, October 2013. [PDF].
Yang Tang, Phillip Ames, Sravan Bhamidipati, Ashish Bijlani, Roxana Geambasu, and Nikhil Sarda. “CleanOS: Limiting Mobile Data Exposure with Idle Eviction.” In Proceedings of the 10th USENIX Symposium on Operating Systems Design and Implementation (OSDI), Hollywood, CA, October 2012. [PDF].
Angelos D. Keromytis, Roxana Geambasu, Simha Sethumadhavan, Salvatore J. Stolfo, Junfeng Yang, Azzedine Benameur, Marc Dacier, Matthew Elder, Darrell Kienzle, and Angelos Stavrou. “The MEERKATS Cloud Security Architecture.” In Proceedings of the 3rd International Workshop on Security and Privacy in Cloud Computing (ICDCS-SPCC), Macao, China, June 2012. [PDF].
Roxana Geambasu. “Regaining Control over Cloud and Mobile Data.” Ph.D. dissertation, University of Washington, Seattle, WA, August 2011. The SIGOPS Dennis M. Ritchie Doctoral Dissertation Honorable Mention. The William Chan Memorial Dissertation Award. [PDF].
Roxana Geambasu, John P. John, Steven D. Gribble, Tadayoshi Kohno, and Henry M. Levy. “Keypad: An Auditing File System for Theft-prone Devices.” In Proceedings of the European Conference on Computer Systems (EuroSys), Salzburg, Austria, April 2011. Award paper. [PDF]; [PPT].
Roxana Geambasu, Tadayoshi Kohno, Arvind Krishnamurthy, Amit Levy, Henry M. Levy, Paul Gardner, and Vinnie Moscaritolo. “New Directions for Self-destructing Data.” Technical Report, University of Washington, UW-CSE-11-08-01, 2011. [PDF].
Roxana Geambasu, Amit Levy, Tadayoshi Kohno, Arvind Krishnamurthy, Henry M. Levy.
“Comet: An Active Distributed Key-Value Store.”
In Proceedings of the 9th USENIX
Symposium on Operating Systems Design and Implementation (OSDI),
Vancouver, Canada, October 2010.
[PDF];
[PPT].
Roxana Geambasu, Tadayoshi Kohno, Amit Levy, Henry M. Levy. “Vanish: Increasing Data Privacy with Self-Destructing Data.” In Proceedings of the 18th USENIX Security Symposium, Montreal, Canada, August 2009. Award paper. [PDF]; [PPT].
Roxana Geambasu, Steven D. Gribble, Henry M. Levy. “CloudViews: Communal Data Sharing in Public Clouds.” In Proceedings of the First USENIX Workshop on Hot Topics in Cloud Computing (HotCloud), San Diego, USA, June 2009. [PDF]; [PPT].
Roxana Geambasu, Andrew Birrell, and John MacCormick. “Experiences with Formal Specification of Fault-Tolerant Storage Systems.” In Proceedings of the 38th IEEE/IFIP International Conference on Dependable Systems and Networks (DSN-DCCS), Anchorage, Alaska, June 2008. [PDF]; [PPT].
Roxana Geambasu, Cherie Cheung, Alexander Moshchuk, Steven D. Gribble,
and Henry M. Levy. “The Organization and Sharing of Web-service Objects with
Menagerie.”
In Proceedings of the 17th International
World Wide Web Conference (WWW), Beijing, China, April 2008.
Paper: [PDF];
Presentation: [PPT,
PDF].
Roxana Geambasu, Magdalena Balazinska, Steven D. Gribble, and Henry M. Levy. “HomeViews: Peer-to-Peer Middleware for Personal Data Sharing Applications.” In Proceedings of the 26th ACM International Conference on Management of Data (SIGMOD), Beijing, China, June 2007. [PDF]; [PPT].
Roxana Geambasu, Tanya Bragin, Jaeyeon Jung, and Magdalena Balazinska. “On-Demand View Materialization and Indexing for Network Forensic Analysis.” In Proceedings of the Third International Workshop on Networking Meets Databases (NetDB), Boston, MA, April 2007. [PDF]; [PPT].