Contact: satanigh@snu.ac.kr | kyoohyunghan@gmail.com (personal)

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Education

Sep 2014 - Feb 2019 : Ph.D of mathematics in cryptology (advisor - Jung Hee Cheon)

Mar 2013 - Aug 2014 : Master of Mathematical Science (advisor - Jung Hee Cheon)

Mar 2009 - Feb 2013 : Bachelor of Mathematical Science

Working

Mar 2019 - Current : Postdoctoral Researcher in Seoul National University

June 2017 - Sep 2017 : Research Intern in Microsoft Research, Redmond, USA

Publications - Journal

[1] Hao Cheon, Ran Gilad-Bachranch, Kyoohyung Han, Zhicong Huang, Amir Jalali, Kim Laine, and Kristin Lauter, Logistic regression over encrypted data from fully homomorphic encryption. BMC Medical Genomics. 2018.

[2] Jung Hee Cheon, Kyoohyung Han, Seong-Min Hong, H Jin Kim, Junsoo Kim, Suseong Kim, Hoseong Seo, Hyungbo Shim, and Yongsoo Song, Toward a Secure Drone System: Flying with Real-time Homomorphic Authenticated Encryption. IEEE Access, 2018.

[3] Jung Hee Cheon, Kyoohyung Han, Chanmin Lee, Hansol Ryu, Damien Stehle, Cryptanalysis of the CLT13 Multilinear Map, Journal of Cryptology, 2018.

Publications - Conference

[1] Kyoohyung Han, Seungwan Hong, Jung Hee Cheon and Daejun Park, Logistic Regression on Homomorphic Encrypted Data at Scale , Innovative Applications of Artificial Intelligence (IAAI), 2019.

[2] Sungjoon Park, Minsu Kim, Seokjun Seo, Seungwan Hong, Kyoohyung Han, Keewoo Lee, Jung Hee Cheon and Sun Kim, A Secure SNP Panel Scheme using Homomorphically Encrypted K-mers without SNP Calling on the User Side, Asia Pacific Bioinformatics Conference (APBC), 2019

[3] Jung Hee Cheon, Kyoohyung Han, Andrey Kim, Miran Kim and Yongsoo Song, A Full RNS Variant of Approximate Homomorphic Encryption. Selected Areas in Cryptography (SAC). 2018

[4] Jung Hee Cheon, Kyoohyung Han, Hyuntae Kim, Junsoo Kim, Hyungbo Shim, Need for Controllers Having Integer Coefficients in Homomorphically Encrypted Dynamic System, IEEE Conference on Decision and Control (CDC), 2018

[5] Hao Chen and Kyoohyung Han, Homomorphic Lower Digits Removal and Improved FHE Bootstrapping. EUROCRYPT. 2018.

[6] Jung Hee Cheon, Kyoohyung Han, Andrey Kim, Miran Kim, and Yongsoo Song, Bootstrapping for Approximate Homomorphic Encryption. EUROCRYPT. 2018.

[7] Jung Hee Cheon, Kyoohyung Han, Jinsu Kim, Changmin Lee and Yongha Sohn, A practical post-quantum public key cryptosystem based on spLWE. ICISC. 2016.

[8] Jung Hee Cheon, Kyoohyung Han, Changmin Lee, Hansol Ryu and Damien Stehnle, Cryptanalysis of the multilinear map over the integers. EUROCRYPT. 2015.

PREPRINTS

[1] Jung Hee Cheon, Kyoohyung Han and Duhyeong Kim, Faster Bootstrapping of FHE over the Integers, 2017, https://eprint.iacr.org/2017/079.pdf

GitHub

[1] Homomorphic Logistic Regression on Large Encrypted Data, https://github.com/HanKyoohyung/HELR

[2] Full-RNS variant of HEAAN scheme, https://github.com/HanKyoohyung/FullRNS-HEAAN