Publications
Conferences
[C07] Towards Lightweight CKKS: On Client Cost Efficiency
(α-β order) Jung Hee Cheon, Minsik Kang, Jai Hyun Park
ASIACCS 2026 (To appear)
[C06] Ciphertext-Ciphertext Matrix Multiplication: Fast for Large Matrices
Jai Hyun Park
EUROCRYPT 2025
[C05] Plaintext-Ciphertext Matrix Multiplication and FHE Bootstrapping: Fast and Fused
(α-β order) Youngjin Bae, Jung Hee Cheon, Guillaume Hanrot, Jai Hyun Park, Damien Stehlé
CRYPTO 2024
[C04] High-precision RNS-CKKS on fixed but smaller word-size architectures: theory and application
(α-β order) Rashmi Agrawal, Jung Ho Ahn, Flavio Bergamaschi, Ro Cammarota, Jung Hee Cheon, Fillipe D. M. de Souza, Huijing Gong, Minsik Kang, Duhyeong Kim, Jongmin Kim, Hubert de Lassus, Jai Hyun Park, Michael Steiner, Wen Wang
WAHC 2023
[C03] HERMES: Efficient Ring Packing using MLWE Ciphertexts and Application to Transciphering
(α-β order) Youngjin Bae, Jung Hee Cheon, Jaehyung Kim, Jai Hyun Park, Damien Stehlé
CRYPTO 2023
[C02] Privacy-Preserving Text Classification on BERT Embeddings with Homomorphic Encryption
Garam Lee*, Minsoo Kim*, Jai Hyun Park*, Seung-won Hwang, Jung Hee Cheon
NAACL (short) 2022
[C01] Towards a Practical Cluster Analysis over Encrypted Data
(α-β order) Jung Hee Cheon, Duhyeong Kim, Jai Hyun Park
SAC 2019
Journals
[J07] Fast Homomorphic Linear Algebra with BLAS
(α-β order) Youngjin Bae, Jung Hee Cheon, Guillaume Hanrot, Jai Hyun Park, Damien Stehlé
Journal of Cryptology 2026 (To appear)
[J06] Tree-based Lookup Table on Batched Encrypted Queries using Homomorphic Encryption
(α-β order) Jung Hee Cheon, Hyeongmin Choe, Jai Hyun Park
Journal of the Korea Mathematical Society 2025
[J05] Efficient Homomorphic Evaluation on Large Intervals
(α-β order) Jung Hee Cheon, Wootae Kim, Jai Hyun Park
TIFS 2022
[J04] Efficient verifiable computation over quotient polynomial rings
Jai Hyun Park*, Jung Hee Cheon, Dongwoo Kim
International Journal of Information Security 2022
[J03] Secure tumor classification by shallow neural network using homomorphic encryption
Seungwan Hong*, Jai Hyun Park, Wonhee Cho, Hyeongmin Choe, Jung Hee Cheon
BMC Genomics 2022
[J02] Noise Removal using Support Vector Regression in Noisy Document Images
Heehoon Kim*, Seunghyo Kang, Jai Hyun Park, Hyunho Ha, Donghoon Lim
The Korean Journal of Applied Statistics 2012
[J01] Robust Image Fusion Using Stationary Wavelet Transform
Heehoon Kim*, Seunghyo Kang, Jai Hyun Park, Hyunho Ha, Jinsoo Lim, Donghoon Lim
The Korean Journal of Applied Statistics 2011
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Preprints
[M05] THED: Threshold Dilithium from FHE
(α-β order) Jai Hyun Park, Alain Passelègue, Damien Stehlé
2026
[M04] Scaling up Privacy-Preserving ML: A CKKS Implementation of Llama-2-7B
Jaiyoung Park*, Sejin Park, Jai Hyun Park, Jung Ho Ahn, Jung Hee Cheon, Guillaume Hanrot, Jung Woo Kim, Minje Park, Damien Stehlé
2026
[M03] Distributed Key Generation for Efficient Threshold-CKKS
Seonhong Min*, Guillaume Hanrot, Jai Hyun Park, Alain Passelègue, Damien Stehlé
2025
[M02] Private Database Query with SIMD-Aware Homomorphic Compression
(α-β order) Jung Hee Cheon, Keewoo Lee, Jai Hyun Park, Yongdong Yeo
2024
[M01] Arithmetic PCA for Encrypted Data
(α-β order) Jung Hee Cheon, Hyeongmin Choe, Saebyul Jung, Duhyeong Kim, Dah Hoon Lee, Jai Hyun Park
2023
