Welcome to my homepage! I am a PhD student in computer science at UPenn and I am broadly interested in security and privacy, cryptography, and computer systems. Much of my recent work focuses on private information retrieval and secure aggregation systems.
At UPenn, I am very fortunate to be advised by Sebastian Angel and Tal Rabin. I am also lucky to work with Yuval Ishai via visits to Technion, and Antigoni Polychroniadou during summer internship at JP Morgan AI Research. My research is supported by a Microsoft Research PhD Fellowship. Prior to PhD, I graduated with a Bachelar of Science from Turing Program at Peking University in 2020.
I will be starting as a postdoc at UC Berkeley working with Raluca Ada Popa.
Computationally Secure Aggregation and Private Information Retrieval in the Shuffle Model [paper]
ACM Conference on Computer and Communications Security (CCS 2024)
Secure Sorting and Selection via Function Secret Sharing
ACM Conference on Computer and Communications Security (CCS 2024)
Compressing Unit-Vector Correlations via Sparse Pseudorandom Generators
Annual International Cryptology Conference (Crypto 2024)
Information-Theoretic Single-Server PIR in the Shuffle Model [paper]
Information-Theoretic Cryptography Conference (ITC 2024)
SPRINT: High-Throughput Robust Distributed Schnorr Signatures [paper]
Annual International Conference on the Theory and Applications of Cryptographic Techniques (Eurocrypt 2024)
Flamingo: Multi-Round Single-Server Secure Aggregation with Applications to Private Federated Learning [paper, code]
IEEE Symposium on Security and Privacy (Oakland 2023)
Addax: A fast, private, and accountable ad exchange infrastructure [paper, code]
USENIX Symposium on Networked Systems Design and Implementation (NSDI 2023)
Ibex: Privacy-preserving ad conversion tracking and bidding [paper, code]
ACM Conference on Computer and Communications Security (CCS 2022)
Incremental Offline/Online PIR [paper, code]
USENIX Security Symposium (USENIX Security 2022)
Mycelium: Large-Scale Distributed Graph Queries with Differential Privacy [paper]
ACM Symposium on Operating Systems Principles (SOSP 2021)
PEGASUS: Bridging Polynomial and Non-polynomial Evaluations in Homomorphic Encryption [paper, code]
IEEE Symposium on Security and Privacy (Oakland 2021)
Ultrafast homomorphic encryption models enable secure outsourcing of genotype imputation [paper, code]
Cell Systems, Cell Press, 2021
"Lightweight Privacy for and from the Masses"
Dissertation Defense, UPenn, Philadelphia, PA, April 2025
"Robust Secure Aggregation for Federated Learning with Input Validation"
Berkeley Security Seminar, Berkeley, CA, October 2024
Privacy-Preserving Machine Learning Workshop, Santa Barbara, CA, August 2024
"Recent Progress in Private Information Retrieval—Theory and Practice"
UPenn Distributed Systems Seminar, Philadelphia, PA, February 2025
AWS, New York, NY, August 2024
"SPRINT: High-Throughput Robust Distributed Schnorr Signatures"
Eurocrypt, Zurich, Switzerland, May 2024 [slides, video]
NY CryptoDay, New York, NY, May 2024
"Flamingo: Multi-Round Single-Server Secure Aggregation with Applications to Private Federated Learning"
AWS (virtual), February 2024
CMU CyLab Seminar, Pittsburgh, PA, October 2023
Privacy-Preserving Machine Learning Workshop, Santa Barbara, CA, August 2023
NYU, New York, NY, July 2023
IEEE S&P (Oakland), San Francisco, CA, May 2023 [slides, video]
UMass Amherst (virtual), May 2023
Microsoft Research (virtual), May 2023
"Single-Server Private Information Retrieval (and Secure Aggregation) in the Shuffle Model"
NYU, New York, NY, April, 2025
Brown Theory Seminar, Providence, RI, April 2025
MIT Security Seminar, Boston, MA, April 2025
ACM CCS, Salt Lake City, UT, October 2024 [slides for computational results]
Northwestern University, Evanston, IL, October 2024 [slides combined for information-theoretic and computational results]
Workshop in PIR, Privacy Enhancing Technologies Symposium (virtual), July 2024
AlgoCRYPT Seminar, J.P. Morgan, New York, NY, June 2024
NY CryptoDay, New York, NY, October 2022 [slides for information-theoretic results]
"Incremental Offline/Online PIR"
AlgoCRYPT Seminar, J.P. Morgan, New York, NY, March 2023 [slides]
UPenn Theory Seminar, Philadelphia, PA, February 2023
UPenn Distributed Systems Seminar, Philadelphia, PA, November 2022
MIT Security Seminar, Boston, MA, November 2022
USENIX Security Symposium, Boston, MA, August 2022 [slides, video]
Technion Crypto Seminar, Haifa, Israel, May 2022
FACT Seminar, Herzliya, Israel, April 2022