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Who am I?

I am a computer scientist working on differential privacy (DP). My focus is on performing DP computation in contexts where large data collectors are not trusted. I build on top of cryptographic constructions like secure shufflers and aggregators. I quantify the privacy-accuracy tradeoff, evaluate communication costs, and bound the influence of malicious data contributors.

As of May 2023, I am a visiting researcher at Google, employed via Magnit. Prior to that, I was a postdoctoral fellow in the Department of Computer Science at Georgetown University, where I was supervised by Prof. Kobbi Nissim. Chao Yan and Laasya Bangalore were excellent PhD. collaborators.

I earned my PhD. at Northeastern University's Khoury College of Computer Science. My advisor was Prof. Jonathan Ullman. Earlier, I attended Stuyvesant High School and earned my BS at New York University's Tandon School of Engineering.

Publications

  • Necessary Conditions in Multi-server Differential Privacy [arXiv].
    With Chao Yan.
  • Differentially Private Histograms in the Shuffle Model from Fake Users [IEEE, arXiv].
    With Maxim Zhilyaev.
    Presented at the 43rd IEEE Symposium on Security and Privacy (S&P 2022).
  • Pure Differential Privacy from Secure Intermediaries [arXiv].
    With Chao Yan.
  • Shuffle Private Stochastic Convex Optimization [OpenReview, arXiv].
    With Matthew Joseph, Jieming Mao, and Binghui Peng.
    Presented at the 10th International Conference on Learning Representations (ICLR 2022).
  • The Limits of Pan Privacy and Shuffle Privacy for Learning and Estimation [arXiv,ACM].
    With Jonathan Ullman.
    Presented at the 53rd ACM Symposium on Theory of Computing (STOC 2021).
  • Connecting Robust Shuffle Privacy and Pan-Privacy [arXiv, SIAM].
    With Victor Balcer, Matthew Joseph, Jieming Mao.
    Presented at ACM-SIAM Symposium on Discrete Algorithms (SODA 2021).
  • Separating Local and Shuffled Differential Privacy via Histograms [DROPS, arXiv].
    With Victor Balcer.
    Presented at the Conference on Information-Theoretic Cryptography (ITC 2020).
  • Private Query Release Assisted by Public Data [arXiv].
    With Raef Bassily, Shay Moran, Aleksandar Nikolov, Jonathan Ullman, Zhiwei Steven Wu.
    Presented at the International Conference on Machine Learning (ICML 2020)
  • Manipulation Attacks in Local Differential Privacy [arXiv, JPC].
    With Adam Smith and Jonathan Ullman.
    Presented at S&P 2021
  • Distributed Differential Privacy via Shuffling [SpringerLink, arXiv].
    With Adam Smith, Jonathan Ullman, David Zeber, and Maxim Zhilyaev.
    Presented at the IACR International Conference on Theory and Application of Cryptographic Techniques (EUROCRYPT 2019).
  • Skyline Identification in Multi-Armed Bandits [IEEE, arXiv].
    With Ravi Sundaram and Jonathan Ullman.
    Presented at the International Symposium on Information Theory (ISIT 2018).

Contact

On the Georgetown University campus, I work in St. Mary's Hall

My email address is ac2305 -at- georgetown -dot- edu