Yiping Ma

Hi! I am a Ph.D. student studying computer science at University of Pennsylvania, where I'm fortunate to be advised by Sebastian Angel and Tal Rabin. I'm broadly interested in cryptography, security and privacy, and computer systems. I'm generously supported by a Microsoft Research PhD Fellowship.

Prior to UPenn, I completed my B.S. in 2020 at Peking University, where I graduated from Turing Class honors program.

Research Papers

Computationally Secure Aggregation and Private Information Retrieval in the Shuffle Model

Adrià Gascón, Yuval Ishai, Mahimna Kelkar, Baiyu Li, Yiping Ma, and Mariana Raykova

ACM Conference on Computer and Communications Security (CCS 2024)

Compressing Unit-Vector Correlations via Sparse Pseudorandom Generators

Amit Agarwal, Elette Boyle, Niv Gilboa, Yuval Ishai, Mahimna Kelkar, Yiping Ma

Annual International Cryptology Conference (Crypto 2024)

SPRINT: High-Throughput Robust Distributed Schnorr Signatures [paper]

Fabrice Benhamouda, Shai Halevi, Hugo Krawczyk, Yiping Ma, and Tal Rabin

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]

Yiping Ma, Jess Woods, Sebastian Angel, Antigoni Polychroniadou, and Tal Rabin

IEEE Symposium on Security and Privacy (Oakland 2023)

Addax: A fast, private, and accountable ad exchange infrastructure [paper, code]

Ke Zhong, Yiping Ma, Yifeng Mao, and Sebastian Angel

USENIX Symposium on Networked Systems Design and Implementation (NSDI 2023)

Ibex: Privacy-preserving ad conversion tracking and bidding [paper, code]

Ke Zhong, Yiping Ma, and Sebastian Angel

ACM Conference on Computer and Communications Security (CCS 2022)

Incremental Offline/Online PIR [paper, code]

Yiping Ma, Ke Zhong, Tal Rabin, and Sebastian Angel

USENIX Security Symposium (USENIX Security 2022)

Mycelium: Large-Scale Distributed Graph Queries with Differential Privacy [paper]

Edo Roth, Karan Newatia, Yiping Ma, Ke Zhong, Sebastian Angel, and Andreas Haeberlen

ACM Symposium on Operating Systems Principles (SOSP 2021)

PEGASUS: Bridging Polynomial and Non-polynomial Evaluations in Homomorphic Encryption [paper, code]

Wen-jie Lu, Zhicong Huang, Cheng Hong, Yiping Ma, and Hunter Qu

IEEE Symposium on Security and Privacy (Oakland 2021)

Ultrafast homomorphic encryption models enable secure outsourcing of genotype imputation [paper, code]

Miran Kim, Arif Ozgun Harmanci, Jean-Philippe Bossuat, Sergiu Carpov, Jung Hee Cheon, Ilaria Chillotti, Wonhee Cho, David Froelicher, Nicolas Gama, Mariya Georgieva, Seungwan Hong, Jean-Pierre Hubaux, Duhyeong Kim, Kristin Lauter, Yiping Ma, Lucila Ohno-Machado, Heidi Sofia, Yongha Son, Yongsoo Song, Juan Troncoso-Pastoriza, Xiaoqian Jiang

Cell Systems, Cell Press, 2021


"SPRINT: High-Throughput Robust Distributed Schnorr Signatures"
    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 Crypto Seminar, Pittsburgh, PA, October 2023
    Privacy-Preserving Machine Learning Workshop, Santa Barbara, CA, August 2023
    NYU Crypto Reading Group, New York, NY, July 2023
    IEEE S&P (Oakland), San Francisco, CA, May 2023 [slides, video]
    Security Seminar, UMass Amherst (virtual), May 2023
    Microsoft Research (virtual), May 2023

"Single-Server Private Information Retrieval in the Shuffle Model"
    NY CryptoDay, New York, NY, October 2022

"Incremental Offline/Online PIR"
    AlgoCRYPT Seminar, J.P. Morgan, 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


I was lucky to visit and intern at multiple places during my study. In summer 2023, I interned at J.P. Morgan AI Research, hosted by Antigoni Polychroniadou. In spring 2022, I visited Yuval Ishai at Technion. In summer 2020, I interned at Alibaba Gemini Lab (now Ant CP Lab), hosted by Cheng Hong. In summer 2019, I did an internship via Summer@EPFL program, hosted by Jean-Pierre Hubaux.