publications

2026

1. CCS

   Revisiting Shamir Secret Sharing for Threshold Fully Homomorphic Encryption

   Jiseung Kim, Seunghu Kim, and Hyung Tae Lee

   In ACM Conference on Computer and Communications Security (CCS), 2026

   To appear

   Bib

   @inproceedings{KKL26ccs,
     title = {Revisiting Shamir Secret Sharing for Threshold Fully Homomorphic Encryption},
     author = {Kim, Jiseung and Kim, Seunghu and Lee, Hyung Tae},
     booktitle = {ACM Conference on Computer and Communications Security (CCS)},
     year = {2026},
     note = {To appear},
   }

2. S&P

   From Perfect to Approximate Hints: Efficient LWE Secret Recovery Leveraging Low Hamming Weight

   Minki Hhan, Ga Hee Hong, Jiseung Kim, Changmin Lee, and Jeonghwan Lee

   In IEEE Symposium on Security and Privacy (S&P), 2026

   To appear

   Bib

   @inproceedings{HHKLL26sp,
     title = {From Perfect to Approximate Hints: Efficient LWE Secret Recovery Leveraging Low Hamming Weight},
     author = {Hhan, Minki and Hong, Ga Hee and Kim, Jiseung and Lee, Changmin and Lee, Jeonghwan},
     booktitle = {IEEE Symposium on Security and Privacy (S&P)},
     year = {2026},
     note = {To appear},
   }

3. IoT-J

   Insecurity of Forward Secure Equality Test for Secure Data Sharing in Healthcare Systems

   Jiseung Kim and Hyung Tae Lee

   IEEE Internet of Things Journal, 2026

   To appear

   Bib

   @article{KL26iotj,
     title = {Insecurity of Forward Secure Equality Test for Secure Data Sharing in Healthcare Systems},
     author = {Kim, Jiseung and Lee, Hyung Tae},
     journal = {IEEE Internet of Things Journal},
     year = {2026},
     note = {To appear}
   }

4. DCC

   Hybrid of Lattice-reduction and Meet-LWE via Near-Collision on Babai’s Plane

   Minki Hhan, Jiseung Kim, Changmin Lee, and Yongha Son

   Designs, Codes and Cryptography, 2026

   Bib

   @article{HKLS26dcc,
     title = {Hybrid of Lattice-reduction and Meet-LWE via Near-Collision on Babai's Plane},
     author = {Hhan, Minki and Kim, Jiseung and Lee, Changmin and Son, Yongha},
     journal = {Designs, Codes and Cryptography},
     year = {2026}
   }

5. SAC

   Private Set Operations from Circuit-Based PSI

   Jiseung Kim, Hyung Tae Lee, and Yongha Son

   In ACM Symposium on Applied Computing (SAC), 2026

   Bib

   @inproceedings{KLS26sac,
     title = {Private Set Operations from Circuit-Based PSI},
     author = {Kim, Jiseung and Lee, Hyung Tae and Son, Yongha},
     booktitle = {ACM Symposium on Applied Computing (SAC)},
     year = {2026}
   }

2025

1. ACCESS

   Cryptanalysis and Modification of Yang et al.’s Certificateless Multi-User Matchmaking Encryption Scheme

   Jiseung Kim and Hyung Tae Lee

   IEEE ACCESS, 2025

   Bib

   @article{KL25access,
     title = {Cryptanalysis and Modification of Yang et al.'s Certificateless Multi-User Matchmaking Encryption Scheme},
     author = {Kim, Jiseung and Lee, Hyung Tae},
     journal = {IEEE ACCESS},
     year = {2025}
   }

2. TSC

   Comment on “RCME: A Reputation Incentive Committee Consensus-Based for Matchmaking Encryption in IoT Healthcare”

   Jiseung Kim and Hyung Tae Lee

   IEEE Transactions on Services Computing, 2025

   Bib

   @article{KL25tsc,
     title = {Comment on ``RCME: A Reputation Incentive Committee Consensus-Based for Matchmaking Encryption in IoT Healthcare''},
     author = {Kim, Jiseung and Lee, Hyung Tae},
     journal = {IEEE Transactions on Services Computing},
     year = {2025}
   }

3. JoC

   Improved Universal Thresholdizer from Iterative Shamir Secret Sharing

   Jung Hee Cheon, Wonhee Cho, and Jiseung Kim

   Journal of Cryptology, 2025

   Bib

   @article{CCK25joc,
     title = {Improved Universal Thresholdizer from Iterative Shamir Secret Sharing},
     author = {Cheon, Jung Hee and Cho, Wonhee and Kim, Jiseung},
     journal = {Journal of Cryptology},
     year = {2025},
   }

2024

1. AMC

   Finding Small Roots for Bivariate Polynomials Modulo an Ideal of the Ring of Integers

   Jiseung Kim and Changmin Lee

   Advances in Mathematics of Communications, 2024

   Bib

   @article{KL24amc,
     title = {Finding Small Roots for Bivariate Polynomials Modulo an Ideal of the Ring of Integers},
     author = {Kim, Jiseung and Lee, Changmin},
     journal = {Advances in Mathematics of Communications},
     year = {2024}
   }

2023

1. DCC

   A Polynomial Time Algorithm for Breaking NTRU Encryption with Multiple Keys

   Jiseung Kim and Changmin Lee

   Designs, Codes and Cryptography, 2023

   Bib

   @article{KL23dcc,
     title = {A Polynomial Time Algorithm for Breaking NTRU Encryption with Multiple Keys},
     author = {Kim, Jiseung and Lee, Changmin},
     journal = {Designs, Codes and Cryptography},
     year = {2023}
   }

2. JCN

   Amortized Efficient zk-SNARK from Linear-Only RLWE Encodings

   Heewon Chung, Dongwoo Kim, Jeong Han Kim, and Jiseung Kim

   Journal of Communications and Networks, 2023

   Bib

   @article{CKKK23jcn,
     title = {Amortized Efficient zk-SNARK from Linear-Only RLWE Encodings},
     author = {Chung, Heewon and Kim, Dongwoo and Kim, Jeong Han and Kim, Jiseung},
     journal = {Journal of Communications and Networks},
     year = {2023}
   }

2022

1. DCC

   Adventures in Crypto Dark Matter: Attacks, Fixes and Analysis for Weak Pseudorandom Functions

   Jung Hee Cheon, Wonhee Cho, Jeong Han Kim, and Jiseung Kim

   Designs, Codes and Cryptography, 2022

   Extended version of PKC 2021

   Bib

   @article{CCKK22dcc,
     title = {Adventures in Crypto Dark Matter: Attacks, Fixes and Analysis for Weak Pseudorandom Functions},
     author = {Cheon, Jung Hee and Cho, Wonhee and Kim, Jeong Han and Kim, Jiseung},
     journal = {Designs, Codes and Cryptography},
     year = {2022},
     note = {Extended version of PKC 2021}
   }

2. IET Inf. Sec.

   Cryptanalysis of the FRS Obfuscation Based on the CLT13 Multilinear Map

   Jiseung Kim and Changmin Lee

   IET Information Security, 2022

   Bib

   @article{KL22iet,
     title = {Cryptanalysis of the FRS Obfuscation Based on the CLT13 Multilinear Map},
     author = {Kim, Jiseung and Lee, Changmin},
     journal = {IET Information Security},
     year = {2022}
   }

2021

1. IET Inf. Sec.

   Extension of Simultaneous Diophantine Approximation Algorithm for Partial Approximate Common Divisor Variants

   Wonhee Cho, Jiseung Kim, and Changmin Lee

   IET Information Security, 2021

   Bib

   @article{CKL21iet,
     title = {Extension of Simultaneous Diophantine Approximation Algorithm for Partial Approximate Common Divisor Variants},
     author = {Cho, Wonhee and Kim, Jiseung and Lee, Changmin},
     journal = {IET Information Security},
     year = {2021}
   }

2. DCC

   (In)security of Concrete Instantiation of Lin17’s Functional Encryption Scheme from Noisy Multilinear Maps

   Wonhee Cho, Jiseung Kim, and Changmin Lee

   Designs, Codes and Cryptography, 2021

   Bib

   @article{CKL21dcc,
     title = {(In)security of Concrete Instantiation of Lin17's Functional Encryption Scheme from Noisy Multilinear Maps},
     author = {Cho, Wonhee and Kim, Jiseung and Lee, Changmin},
     journal = {Designs, Codes and Cryptography},
     year = {2021}
   }

3. PKC

   Adventures in Crypto Dark Matter: Attacks and Fixes for Weak Pseudorandom Function

   Jung Hee Cheon, Wonhee Cho, Jeong Han Kim, and Jiseung Kim

   In International Conference on Practice and Theory of Public-Key Cryptography (PKC), 2021

   Bib

   @inproceedings{CCKK21pkc,
     title = {Adventures in Crypto Dark Matter: Attacks and Fixes for Weak Pseudorandom Function},
     author = {Cheon, Jung Hee and Cho, Wonhee and Kim, Jeong Han and Kim, Jiseung},
     booktitle = {International Conference on Practice and Theory of Public-Key Cryptography (PKC)},
     year = {2021},
   }

2020

1. JMC

   Algorithms for CRT-variant of Approximate Greatest Common Divisor Problem

   Jung Hee Cheon, Wonhee Cho, Minki Hhan, Jiseung Kim, and Changmin Lee

   Journal of Mathematical Cryptology, 2020

   Extended version of NutMic 2019

   Bib

   @article{CCHKL20jmc,
     title = {Algorithms for CRT-variant of Approximate Greatest Common Divisor Problem},
     author = {Cheon, Jung Hee and Cho, Wonhee and Hhan, Minki and Kim, Jiseung and Lee, Changmin},
     journal = {Journal of Mathematical Cryptology},
     year = {2020},
     note = {Extended version of NutMic 2019}
   }

2019

1. CRYPTO

   Statistical Zeroizing Attack: Cryptanalysis of Candidates of BP Obfuscation over GGH15 Multilinear Map

   Jung Hee Cheon, Wonhee Cho, Minki Hhan, Jiseung Kim, and Changmin Lee

   In Annual International Cryptology Conference (CRYPTO), 2019

   Bib

   @inproceedings{CCHKL19crypto,
     title = {Statistical Zeroizing Attack: Cryptanalysis of Candidates of BP Obfuscation over GGH15 Multilinear Map},
     author = {Cheon, Jung Hee and Cho, Wonhee and Hhan, Minki and Kim, Jiseung and Lee, Changmin},
     booktitle = {Annual International Cryptology Conference (CRYPTO)},
     year = {2019},
   }

2. NutMic

   Algorithms for CRT-variant of Approximate Greatest Common Divisor Problem

   Jung Hee Cheon, Wonhee Cho, Minki Hhan, Minsik Kang, Jiseung Kim, and 1 more author

   In Number-Theoretic Methods in Cryptology (NutMic), 2019

   Bib

   @inproceedings{CCHKKL19nutmic,
     title = {Algorithms for CRT-variant of Approximate Greatest Common Divisor Problem},
     author = {Cheon, Jung Hee and Cho, Wonhee and Hhan, Minki and Kang, Minsik and Kim, Jiseung and Lee, Changmin},
     booktitle = {Number-Theoretic Methods in Cryptology (NutMic)},
     year = {2019}
   }

2018

1. CRYPTO

   Cryptanalyses of Branching Program Obfuscations over GGH13 Multilinear Map from the NTRU Problem

   Jung Hee Cheon, Minki Hhan, Jiseung Kim, and Changmin Lee

   In Annual International Cryptology Conference (CRYPTO), 2018

   Bib

   @inproceedings{CHKL18crypto,
     title = {Cryptanalyses of Branching Program Obfuscations over GGH13 Multilinear Map from the NTRU Problem},
     author = {Cheon, Jung Hee and Hhan, Minki and Kim, Jiseung and Lee, Changmin},
     booktitle = {Annual International Cryptology Conference (CRYPTO)},
     year = {2018},
   }

2. ACCESS

   Cryptanalysis on the HHSS Obfuscation Arising from Absence of Safeguards

   Jung Hee Cheon, Minki Hhan, Jiseung Kim, and Changmin Lee

   IEEE ACCESS, 2018

   Bib

   @article{CHKL18access,
     title = {Cryptanalysis on the HHSS Obfuscation Arising from Absence of Safeguards},
     author = {Cheon, Jung Hee and Hhan, Minki and Kim, Jiseung and Lee, Changmin},
     journal = {IEEE ACCESS},
     year = {2018}
   }