Conferences

  1. Towards Lightweight CKKS: On Client Cost Efficiency

    (α-β order) Jung Hee Cheon, Minsik Kang, Jai Hyun Park

    ASIACCS 2026

    [pdf]

  2. Ciphertext-Ciphertext Matrix Multiplication: Fast for Large Matrices

    Jai Hyun Park

    EUROCRYPT 2025

    [doi] [pdf] [blog] [slides] [video]

  3. 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

    [doi] [pdf] [slides] [video]

  4. 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

    [doi] [pdf]

  5. 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

    [doi] [pdf] [slides] [video]

  6. Privacy-Preserving Text Classification on BERT Embeddings with Homomorphic Encryption

    Garam Lee*, Minsoo Kim*, Jai Hyun Park*, Seung-won Hwang, Jung Hee Cheon

    NAACL 2022 (short)

    [doi] [pdf]

  7. Towards a Practical Cluster Analysis over Encrypted Data

    (α-β order) Jung Hee Cheon, Duhyeong Kim, Jai Hyun Park

    SAC 2019

    [doi] [pdf] [code] [slides]

    Journals

  1. Tree-based Lookup Table on Batched Encrypted Queries using Homomorphic Encryption

    (α-β order) Jung Hee Cheon, Hyeongmin Choe, Jai Hyun Park

    JKMS 2025

    [doi] [pdf]

  2. Efficient Homomorphic Evaluation on Large Intervals

    (α-β order) Jung Hee Cheon, Wootae Kim, Jai Hyun Park

    TIFS 2022

    [doi] [pdf]

  3. Efficient verifiable computation over quotient polynomial rings

    Jai Hyun Park, Jung Hee Cheon, Dongwoo Kim

    IJIS 2022

    [doi] [code]

  4. Secure tumor classification shallow neural network using homomorphic encryption

    Seungwan Hong, Jai Hyun Park, Wonhee Cho, Hyeongmin Choe, Jung Hee Cheon

    BMC Genomics 2022

    [doi] [pdf] [code]

  5. Noise Removal using Support Vector Regression in Noisy Document Images

    Hee Hoon Kim, Seung Hyo Kang, Jai Hyun Park, Hyun Ho Ha, Dong Hoon Lim

    The Korean Journal of Applied Statistics 2012 한국통계학회 응용통계연구지 2012

    [doi] [pdf]

  6. Robust Image Fusion Using Stationary Wavelet Transform

    Hee Hoon Kim, Seung Hyo Kang, Jai Hyun Park, Hyun Ho Ha, Jin soo Lim, Dong Hoon Lim

    The Korean Journal of Applied Statistics 2011 한국통계학회 응용통계연구지 2012

    [doi] [pdf]

    Preprints

  1. Distributed Key Generation for Efficient Threshold-CKKS

    Seonhong Min, Guillaume Hanrot, Jai Hyun Park, Alain Passelègue, Damien Stehlé

    [pdf]

  2. Fast Homomorphic Linear Algebra with BLAS

    (α-β order) Youngjin Bae, Jung Hee Cheon, Guillaume Hanrot, Jai Hyun Park, Damien Stehlé

    [pdf]

  3. Private Database Query with SIMD-Aware Homomorphic Compression

    (α-β order) Jung Hee Cheon, Keewoo Lee, Jai Hyun Park, Yongdong Yeo

    [pdf] [code]

  4. Arithmetic PCA for Encrypted Data

    (α-β order) Jung Hee Cheon, Hyeongmin Choe, Saebyul Jung, Duhyeong Kim, Dah Hoon Lee, Jai Hyun Park

    [pdf]