About me
I am a cryptography researcher at Seoul National University. I received my Ph.D. in applied mathematics from Hanyang University, where I was a member of the Cryptology & Algorithm Lab. My research interests include constructing secure cryptographic algorithms and their real-world applications.
News
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(Sep 01, 2025) I joined the Cryptography & Privacy lab at Seoul National University as a postdoctoral researcher under the supervision of Yongsoo Song.
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(Aug 21, 2025) I have completed my Ph.D. program. I sincerely appreciate my advisor, Professor Jae Hong Seo, and the members of the Cryptology & Algorithm Lab!
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(Jul 03, 2025) One paper has been accepted at ACM CCS’25.
Title : Practical Zero-Knowledge PIOP for Maliciously Secure Multiparty Homomorphic Encryption
Authors : Intak Hwang , Hyeonbum Lee, Jinyeong Seo, and Yongsoo Song. -
(Jun 22, 2025) One paper has been accepted at ESORICS’25.
Title : UTRA: Universal Token Reusability Attack and Token Unforgeable Delegatable Order-Revealing Encryption
Authors : Jaehwan Park, Hyeonbum Lee, Junbeom Hur, Jae Hong Seo and Doowon Kim. -
(Nov 5, 2024) I presented a talk titled ‘How to Design a Zero-Knowledge Proof System in the Discrete Logarithm Setting’ at the Hanyang Mathematics Colloquium in Seoul.
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(Oct 11, 2024) I won an Excellence Prize at the National Cryptographic Technology Contest, 2024.
Title : UTRA: Universe Token Reusability Attack and Verifiable Delegatable Order-Revealing Encryption
Participants : Hyeonbum Lee, Jaehwan Park, Junbeom Hur, Jae Hong Seo, and Doowon Kim
Languages
| Language | Level |
|---|---|
| Korean | Native |
| English | Intermediate |
Contact
For any inquires, you can reach me via email: leehb3706@gmail.com