NEWS

  1. Jul 2026

    Our paper "THED: Threshold Dilithium from FHE" is accepted to ACM CCS 2026.

  2. Jun 2026

    I gave an invited talk on threshold Dilithium at PACOH workshop in Korea.

  3. May 2026

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

  4. Feb 2026

    I gave an invited talk on threshold Dilithium at SNU.

  5. Jan 2026

    Our paper "Scaling up FHE-based Privacy-Preserving ML: Higher Throughput, Longer Inputs for LLama-3-8B" is available online.

  6. Jan 2026

    I have been promoted to Senior Researcher at CryptoLab.

    크립토랩의 책임연구원으로 승진했습니다.

Selected Publications

  • THED: Threshold Dilithium from FHE

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

    CCS 2026

    pdf

  • 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

    doi pdf

  • Ciphertext-Ciphertext Matrix Multiplication: Fast for Large Matrices

    Jai Hyun Park

    EUROCRYPT 2025

    doi pdf blog slides video

  • 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

  • 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

  • Efficient Homomorphic Evaluation on Large Intervals

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

    TIFS 2022

    doi pdf

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