Yiping Ma

I am a third-year Ph.D. student studying computer science at University of Pennsylvania, where I am fortunate to be advised by Prof. Sebastian Angel and Prof. Tal Rabin. I am interested in applied cryptography, security and privacy, and computer systems. I am a recipient of 2022 Microsoft Research PhD Fellowship.

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


Addax: A fast, private, and accountable ad exchange infrastructure

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

NSDI 2023 | paper

Ibex: Privacy-preserving ad conversion tracking and bidding

Ke Zhong, Yiping Ma, and Sebastian Angel

CCS 2022 | paper | code

Incremental Offline/Online PIR

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

USENIX Security 2022 | paper | code

Mycelium: Large-Scale Distributed Graph Queries with Differential Privacy

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

SOSP 2021 | paper

PEGASUS: Bridging Polynomial and Non-polynomial Evaluations in Homomorphic Encryption

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

IEEE S&P (Oakland) 2021 | paper | code

Ultrafast homomorphic encryption models enable secure outsourcing of genotype imputation

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 | paper | code


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

"Incremental Offline/Online PIR"
    UPenn DSL Seminar, Philadelphia, PA, US. November 2022
    MIT Security Seminar, Boston, MA, US. November 2022
    USENIX Security Symposium, Boston, MA, US. August 2022 [slides, video]
    Technion Crypto Seminar, Haifa, Israel. May 2022
    FACT Seminar, IDC Herzliya, Israel. April 2022

Internships and Visits

Technion, Israel, Spring 2022
Hosted by Prof. Yuval Ishai

Gemini Lab, Alibaba, China, Summer 2020
Hosted by Dr. Cheng Hong

LDS, EPFL, Switzerland, Summer 2019
Hosted by Prof. Jean-Pierre Hubaux


Cryptography, Head TA, Fall 2020 & Fall 2021

Analysis of Algorithms, TA, Spring 2019

Discrete Mathematics, TA, Spring 2019

Selected Awards

Microsoft Research PhD Fellowship, 2022

NIGMS Award for iDASH Genome Privacy & Security Competition, 2019, 2020

Academic Excellence Award, Peking University, 2019

Summer@EPFL Fellowship, EPFL, 2019

Mount Everest Scholarship, First Honors, Peking University, 2018