sPAR: (Somewhat) Practical Anonymous Router
Debajyoti Das, Jeongeun Park, and Hyewon Sung
Hello! I'm Hyewon.
I'm a Ph.D. candidate in Mathematics at Ewha Womans University, specializing in cryptography under the supervision of Prof. Hyang-Sook Lee.
My research interests include fully homomorphic encryption (FHE), privacy-preserving protocols, and post-quantum cryptography.
Here are a few quick links about me!
My inbox is always open! Feel free to send me an email if you have any questions.
send me an email (hyewonsung@ewha.ac.kr)Research output
Publications and Preprints
Accepted
Cryptanalysis of an Unbounded Fully Homomorphic Encryption Scheme
Hyewon Sung and Mehdi Tibouchi
Traveling Salesman-Based Token Ordering Improves Stability in Homomorphically Encrypted Language Models
Donghwan Rho, Sieun Seo, Hyewon Sung, Chohong Min, and Ernest K. Ryu
Private Information Retrieval based on Homomorphic Encryption, Revisited
Jaeseon Kim, Jeongeun Park, and Hyewon Sung
EvalRound+ Bootstrapping and its Rigorous Analysis for CKKS Scheme
Hyewon Sung, Sieun Seo, Taekyung Kim, and Chohong Min
Experience
Education and Experiences
Jul 2026 — Present
Research
Research Intern
NTT Social Informatics Laboratories · Japan · Working with Mehdi Tibouchi and Calvin Abou Haidar
Oct 2025 — Apr 2026
Research
Research Intern
NTT Social Informatics Laboratories · Japan · Worked with Mehdi Tibouchi
Mar 2021 — Present
Education
Integrated M.S./Ph.D. in Mathematics
Ewha Womans University · Cryptography · Advised by Prof. Hyang-Sook Lee
Mar 2017 — Feb 2021
Education
B.S. in Mathematics
Ewha Womans University · Double major in Information Security · Minor in Computer Engineering
Beyond research
A little life outside cryptography
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