Jiaxin Guan | 管佳鑫

(Theory × Practice) @ Cryptography

profile.jpg

jiaxin [at] guan [dot] io

I am an Applied Cryptographer at Zellic, where I audit and conduct research across a wide range of advanced cryptographic systems.

My academic research focuses on the space aspects of cryptography, exploring scenarios where space is a limited resource for either adversaries or honest users. This includes work on the Bounded Storage Model, incompressible cryptography, streaming functional encryption, and space lower bounds. I am also broadly interested in other topics in theoretical and applied cryptography in general.

Previously, I was an Assistant Professor / Faculty Fellow at New York University, hosted by Marshall Ball and Yevgeniy Dodis. I earned my PhD from Princeton University, where I was fortunate to be advised by Mark Zhandry. I graduated with a B.S. with Honors and a M.S. from Stanford University, with Dan Boneh as my advisor.

When I’m not working, I mostly enjoy photography, theater, and cooking.

News

Aug 24, 2026 Two of my papers, “Multi-Hop Functional Encryption” (joint work with Pratish Datta, Alexis Korb and Amit Sahai) and “A Complexity Theoretic Approach to Proofs of Space” (joint work with Marshall Ball), are to appear at TCC 2026.
Aug 26, 2025 Two of my papers, “Adaptively Secure Streaming Functional Encryption” and “(Multi-Input) FE for Randomized Functionalities, Revisited” are appearing at TCC 2025. Both are joint work with Pratish Datta, Alexis Korb and Amit Sahai.
Jun 16, 2025 I am starting my new position as an Applied Cryptographer at Zellic.
Dec 06, 2024 My paper “HELP: Everlasting Privacy through Server-Aided Randomness” will be published in the new IACR journal Communications in Cryptology Volume 1, Issue 4. Joint work with Yevgeniy Dodis, Peter Hall, and Alison Lin.
Nov 05, 2024 I will serve on the Editorial Board of IACR Communications in Cryptology 2025.