About us

We are Cryptology & Algorithm Lab and our leader is Professor Jae Hong Seo. Our main research interests are in cryptography especially zero-knowledge proof. Besides cryptography, we’re interested in artificial intelligence using deep learning such as face recognition and speaker recognition.

Annual News

  • (Oct 29, 2023) The following paper has been accepted for presentation at the IEEE S&P 2024.
    • Sunpill Kim, Yong Kiam Tan, Bora Jeong, Soumik Mondal, Khin Mi Mi Aung, and Jae Hong Seo
      Scores Tell Everything about Bob: Non-adaptive Face Reconstruction on Face Recognition Systems
  • (Oct 4, 2023) Papers led by C&A members won several awards at the National Cryptographic Technology Contest, 2023.
    • The following paper won the Excellence Award. Congrats all authors who participated in this submission.
      • Sunpill Kim, Seunghun Paik, Chanwoo Hwang, Dongsu Kim, Junbum Shin, and Jae Hong Seo
        IDFace: Efficient and Secure Identification for Face Images
    • The following paper won the Encouragement Award. Congrats all authors who participated in this submission.
      • Sunpill Kim, Yong Kiam Tan, Bora Jeong, Soumik Mondal, Khin Mi Mi Aung, and Jae Hong Seo
        Scores Tell Everything about Bob: Non-adaptive Face Reconstruction on Face Recognition Systems
    • The following paper won the Special Award. Congrats all authors who participated in this submission.
      • Hyeonbum Lee, Kyuhwan Lee, Jae Hong Seo, Wenyi Tang, Shankha Shubhra Mukherjee, and Taeho Jung
        PrivHChain: Monitoring the Supply Chain of Controlled Substances with Privacy-Preserving Hierarchical Blockchain
  • (Sep 26, 2023) HUCC, Crypto Club of Hanyang University, won the Top Excellence Award (최우수상) in Cryptanalysis Contest, 2023, hosted by Military Crypto Research Center. Congrats three of C&A members, Seunghun Paik, Chanwoo Hwang, and Minsu Kim, who are a leader and two members of HUCC.
  • (Aug 22, 2023) The following paper has been accepted for presentation at the BMVC 2023 (Oral).
    • Seunghun Paik, Sunpill Kim, and Jae Hong Seo
      Security Analysis on Locality-Sensitive Hashing-Based Biometric Template Protection Schemes
  • (Jul 25, 2023) The following paper has been accepted for publication in IEEE TIFS.
    • Sungwook Kim, Hyeonbum Lee, Gwangwoon Lee, and Jae Hong Seo
      Sublinear Verifier Inner Product Argument under Discrete Logarithm Assumption
  • (July 13, 2023) There will be an invited lecture by Prof. Taeho Jung, Notre Dame.
    • Date & Place : 10:30 AM, Jul 13 / Natural Science building 702
    • Title : Cryptography and Blockchain for Secure and Private Web3 Ecosystem
    • (For more information, click the arrow)
  • (May 31, 2023) The following paper has been accepted for publication in IWSEC 2023.
    • Hyeonbum Lee and Jae Hong Seo
      TENET : Sublogarithmic Proof, Sublinear Verifier Inner Product Argument without a Trusted Setup
  • (May 13, 2023) Two of our members, Seunghun Paik and Minsu Kim, received the Top Academic Excellence Award (한양학업최우수상) from the President of Hanyang University.
  • (Apr 20, 2023) The following paper has been accepted for publication in Designs, Codes and Cryptography.
    • Hyung Tae Lee and Jae Hong Seo
      On the Security of Functional Encryption in the Generic Group Model
  • (Apr 20, 2023) Prof. Jae Hong Seo joins in the program committees of ASIACRYPT 2023 and PQCrypto 2023.
  • (Feb 14, 2023) Bora Jeong won the Grand Prize in the Best Research Paper Award for graduate students by the Research Institute for Natural Sciences, Hanyang University.
    • Bora Jeong, Sunpill Kim, Seunghun Paik, and Jae Hong Seo
      Analysis on Secure Triplet Loss.
  • (Jan 5, 2023) Our student captain, Sunpill Kim, visits A*STAR at Singapore, one of the world's leading research institutes, for a year-long collaborative research. We wish him success in his studies at A*STAR.

We share information with each other through various seminars/studies that support research capabilities every summer/winter vacation to enhance research and inquiry skills. Each season, the main topic changes and the schedule also changes accordingly. External personnel are also free to participate, and you can attend by filling out the form from above link.

23 Summer

IVC
Seminar Schedule - IVC
Date Time Place Presenter Topic Material Blog Post
6/27 01:00PM 701 Hyeonbum Lee Nova : Recursive Zero Knowledge Arguments from Folding Schemes(DOI)
7/6
7/11 07:00PM 702 Hyunjung Son SuperNova: Proving universal machine executions without universal circuits(DOI)
7/18 01:00PM 701 Seongae Baek Customizable constraint systems for succinct arguments(DOI)
7/25
8/1 01:00PM 751 Hyeonbum Lee Hypernova : Recursive arguments for customizable constraint systems(DOI)
8/8 702
8/14 01:00PM 701 Hyunjung Son Protostar : Generic Efficient Accumulation/Folding for Special-sound Protocols(DOI)
TBD


Deep Learning
Seminar Schedule - Deep Learning Paper
Date Time Place Presenter Topic Material Blog Post
7/12 10:00AM 702 Bora Jeong DeepFool: A simple and accurate method to fool deep neural networks (CVPR'16)(DOI)
Seunghun Paik Adversarial Examples Are Not Bugs, They Are Features (NIPS'19 Spotlight)(DOI)
7/19 10:00AM 702 Chanwoo Hwang Adversarial Patch (arXiv'17)(DOI)
Dongsu Kim Efficient Decision-based Black-box Adversarial Attacks on Face Recognition (CVPR'19)(DOI)
7/26 10:00AM 702 Minsu Kim Universal adversarial perturbations (CVPR'17)(DOI)
8/2 10:00AM 702 Bora Jeong Iris Recognition (LINK) (LINK)
Seunghun Paik Understanding Adversarial Examples (LINK) (LINK)
8/9 10:00AM 702 Chanwoo Hwang What is Dataset Distillation? (LINK) (LINK)
8/16 10:00AM 702 Dongsu Kim Predictive Coding
8/30 10:00AM TBA Hyeonkyu Kim Recurrent Neural Network
9/1 03:00PM TBA Minsu Kim Fuzzy Extractor


ZKP Basic
Seminar Schedule - ZKP Basic
Date Time Place Presenter Topic Material Blog Post
7/07 02:00PM 702 Junhee Cho proofs, interactive proofs, schwarz-zippel lemma, multilinear extension
7/14 10:00AM 702 Yunki Kim sumcheck protocol
7/21 02:00PM 702 Seongae Baek application of sum-check protocol
7/28 02:00PM 702 Seongae Baek GKR protocol
8/04 02:00PM 702 Junhee Cho
Yunki Kim
non-interactive proofs, random oracle model, fiat-shamir heuristic argument of knowledge, knowledge soundness
8/10 02:00PM 702 Yunki Kim zero-knowledge, sigma protocol


22-23 Winter

Deep Learning
Seminar Schedule - Deep Learning Paper
Date Time Place Presenter Topic
1/2 01:00PM 702 Seunghun Universal Hopfield Networks: A General Framework for Single-Shot Associative Memory Models
Dongsu Towards Face Encryption by Generating Adversarial Identity Masks
1/16 01:00PM 702 Chanwoo SFace: Sigmoid-Constrained Hypersphere Loss for Robust Face Recognition
Seunghun Continual variational autoencoder learning via online cooperative memorization
1/26 10:00AM 702 Prof. Jaehong Seo Hopfield Network Summary
1/30 01:00PM 702 Dongsu AnchorFace: Boosting TAR@FAR for Practical Face Recognition
Chanwoo Privacy-Preserving Face Recognition with Learnable Privacy Budgets in Frequency Domain
2/13 01:00PM 701 Seunghun Hyperspherical Consistency Regularization
Dongsu CoupleFace: Relation Matters for Face Recognition Distillation
2/20 01:00PM 702 Chanwoo QuantFace: Towards lightweight face recognition by synthetic data low-bit quantization
Seunghun On the Relationship Between Variational Inference and Auto-Associative Memory
TBD TBD TBD Dongsu UFace: An Unsupervised Deep Learning Face Verification System
Chanwoo Frontal-Centers Guided Face: Boosting Face Recognition by Learning Pose-Invariant Features


Computational Number Theory & Algebra
Seminar Schedule - Computational Number Theory & Algebra
Book : A computational Introductiobn to Numver Theory and Algebra second Edition
Date Time Place Topic
1/5 01:00PM 702 Chap. 1 ~ 4, Review on Number Theory and Integer Arithmetics
1/12 01:00PM 702 Chap. 8 ~ 9, Probabilistic Distributions and Algorithms on
1/19 01:00PM 702 Chap. 10 ~ 12, More Probabilistic Algorithms on (e.g. Miller-Rabin Test)
1/26 01:00PM 702 Chap. 6,7,13,14, Groups, Rings, Modules, and Vector Spaces
2/2 01:00PM 702 Chap. 16, More on Rings (e.g. Field Extension, PID, UFD, ...)
2/9 01:00PM 702 Chap. 17 ~ 18, Polynomial Arithmetics, and Linearly Generated Sequences
2/16 01:00PM 702 Chap. 19 ~ 20, Finite Fields, Algorithms for Finite Fields (e.g. Cantor-Zassenhaus Algorithm)
2/23 01:00PM 702 Chap. 15, 21, Dixon’s Method, Index Calculus Method, and AKS Algorithm


Algorithm
Seminar Schedule - Algorithm
Every Wednesday at 1pm


Zero Knowledge Proof
Seminar Schedule - Zero Knowledge Proof
TBD

Note that the contents of the seminar will be shared through the following blog post.

Contact


For any inquires, you can reach us via email: webmaster.cnalab@gmail.com