Keewoo Lee

I am a postdoctoral researcher studying cryptography at UC Berkeley, hosted by Prof. Sanjam Garg. I obtained my Ph.D. in Mathematical Sciences at Seoul National University, advised by Prof. Jung Hee Cheon.

I am broadly interested in cryptography from theory to practice. Currently, my research focus is on cryptographic primitives for secure computation (e.g., homomorphic encryption, secure multiparty computation) and their applications (e.g., privacy-preserving machine learning).

news

Apr 2024	[ Talk ] I am giving a talk at Bay Area Crypto Day on April 19th.
Apr 2024	[ Award ] My thesis “A Study on Homomorphic Packing: Definitions, Constructions, and Limitations” received the Best Doctoral Dissertation Award ($1000) from the Korean Mathematical Society.
Mar 2024	[ Paper ] The paper “Bit Security as Cost to Demonstrate Advantage” is accepted to IACR CiC.
Sep 2023	[ Paper ] The paper “VeriSimplePIR: Verifiability in SimplePIR at No Online Cost for Honest Servers” is accepted to USENIX Security 2024.
Aug 2023	[ Award ] My thesis “A Study on Homomorphic Packing: Definitions, Constructions, and Limitations” received the Best Doctoral Dissertation Award ($2000) from College of Natural Sciences @ SNU.
Oct 2022	[ Talk ] I will give an invited talk at the Focus Session on “Discrete Math and Math of Computer Science” at 2022 Global KMS (Korean Math. Soc.) International Conference on Oct 20th, which is held to celebrate the promotion of Korea as IMU (Internat’l Math. Union) member of Group 5.
Sep 2022	[ Award ] The paper “Bit Security as Cost to Demonstrate Advantage” won Best Award ($3000) in National Cryptography Contest.
Jun 2022	[ Paper ] I will be presenting our paper “Limits of Polynomial Packings for $\mathbb{Z}_{p^k}$ and $\mathbb{F}_{p^k}$” at Eurocrypt 2022 (Trondheim, Norway). The session will be at Jun 2nd 9:00~10:15 CEST.
May 2022	[ Award ] Being selected in the top 10% among the recipients of Global PhD Fellowship, I received additional $4000 from National Research Foundation of Korea.
Mar 2022	[ Talk ] Being selected as an outstanding graduate student of Math@SNU, I will give an invited talk at BK Colloquium on Mar 22nd.
Aug 2021	[ Paper ] I will be presenting our paper “MHz2k: MPC from HE over Z2k” at Crypto 2021. The live session will be at Aug 20th 15:00~15:50 UTC. The pre-recorded video is now on youtube.