NEWS

  1. Sep 2026

    Upcoming talk on encrypted matrix multiplication at Dongguk University on Sep 7.

  2. Sep 2026

    "Distributed Key Generation for Efficient Threshold-CKKS" was accepted to ACM CCS 2026.

  3. Jul 2026

    "THED: Threshold Dilithium from FHE" was accepted to ACM CCS 2026.

  4. May 2026

    "Fast Homomorphic Linear Algebra with BLAS" was published in Journal of Cryptology.

  5. Jan 2026

    "Scaling up FHE-based Privacy-Preserving ML" is available online.

  6. Jan 2026

    Promoted to Senior Researcher at CryptoLab.

Selected Publications

  • THED: Threshold Dilithium from FHE

    (α-β order) Jai Hyun Park, Alain Passelègue, Damien Stehlé

    ACM CCS 2026

  • Distributed Key Generation for Efficient Threshold-CKKS

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

    ACM CCS 2026

  • 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

  • Ciphertext-Ciphertext Matrix Multiplication: Fast for Large Matrices

    Jai Hyun Park

    EUROCRYPT 2025

  • 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

  • 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

  • Efficient Homomorphic Evaluation on Large Intervals

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

    IEEE TIFS 2022

    • For the complete list of my publications, please click here.