I am looking for highly motivated students who are interested in data science, AI, big data, distributed computing, security and privacy.
When SGX-based secure programs are used for processing encrypted data, access pattern leakage can still be explored to learn sensitive information. We propose that by regulating application-level data flows with a MapReduce-style processing model, we can protect access patterns more efficiently - "SGX-MR: Regulating Dataflows for Protecting Access Patterns of Data-Intensive SGX Applications" by Mubashwir Alam, Sagar Sharma, and Keke Chen, to appear in Privacy Enhancing Technologies Symposium, 2021
To find crypto-friendly learning algorithms for confidential learning - Sagar Sharma and Keke Chen "Confidential Boosting with Random Linear Classifiers for Outsourced User-generated Data", to appear in the European Symposium on Research in Computer Security (ESORICS), 2019
To appear in ICWSM19, "Who should be the captain this week? Leveraging inferred diversity-enhanced crowd wisdom for a Fantasy Premier League prediction task" by Shreyansh Bhatt, Keke Chen, Valerie L. Shalin, Amit Sheth, Brandon Minnery. This is a collaborative work on optimizing the crowd composition to achieve the wisdom of crowd without the crowd's prior performance data.
I am co-chairing BigData Congress 2019. Welcome to submit papers. The deadline is March 22, 2019 for all tracks.
Serving on the editorial board of ACM Transactions on Internet Technology (TOIT), starting in 2019
"Knowledge graph enhanced community detection and characterization" to appear in ACM Web Search and Data Mining (WSDM) 2019, by Shreyansh Bhatt, Swati Padhee, Keke Chen, Valerie Shalin, Derek Doran, Amit Sheth and Brandon Minnery.
Two posters about privacy-preserving deep learning and boosting in ACM CCS 2018, both led by Sagar Sharma.
Sagar Sharma, James Powers, and Keke Chen "PrivateGraph: Privacy-Preserving Spectral Analysis of Encrypted Graphs in the Cloud ", IEEE TKDE, 2018. It includes a comparative study on two provably secure solutions (Ring-LWE vs. Additive HE + novel data obscuration methods) for graph spectral analysis in the cloud, where encrypted graphs are possibly contributed by millions of users.
A review about the issues with privacy-preserving data analytics for IoT/Cloud based healthcare systems, by Sagar Sharma, Keke Chen, and Amit Sheth, to appear in IEEE Internet Computing, 2018.