Modern Cryptographic Techniques (PRG2531)

General Data

Abstract. Cryptography is the science of secure computation, enabling encryption and digital signatures. We focus on several modern areas of cryptography, including zero-knowledge (ZK) proofs, postquantum (PQ, secure against quantum computers) cryptography, and code-based cryptography. Each is a vital and widely studied area of cryptography that has undergone a scientific revolution over the last three years. The project's goal is to create sustainable Estonian expertise in all three areas. ZK proofs can be used to implement verifiable computation, which has already been widespread in private cryptocurrencies and can be applied to ZK machine learning and provably secure e-voting. All would be impossible without ZK proofs. To prepare against the impending arrival of quantum computers, we study PQ cryptography, concentrating on lattice-based and code-based techniques in PQ cryptography. The project team combines strong researchers and expertise from cryptography, coding theory, and mathematics.

PI: Helger Lipmaa

Senior staff: Vitaly Skachek, Sedat Akleylek, Ago-Erik Riet, ...

Duration: 01.01.2025−31.12.2029

Link in ETIS: https://www.etis.ee/Portal/Projects/Display/82331c17-bfb3-4834-9f1a-47cd5e0c8b5e

Related publications

According to ETIS

  • Hollmann, Henk D.L. (2025). A Family of Optimal Linear Functional-Repair Regenerating Storage Codes. Entropy, 27 (376). DOI: 10.3390/e27040376.
  • Arat, F.; Akleylek, S.; Tok, Z.Y. (2025). A Hybrid Graph-based Risk Assessment and Attack Path Detection Model for IoT Systems. IEEE Access, 64770−64782. DOI: 10.1109/ACCESS.2025.3558985.
  • Arat, Ferhat; Akleylek, Sedat (2025). Security-aware RPL: Designing a novel objective function for risk-based routing with rank evaluation. Computer Networks, 260, ARTN 111122. DOI: 10.1016/j.comnet.2025.111122.
  • Bugra Sezer, B.; Akleylek, S.; Nuriyev, U. (2025). PP-PQB: Privacy-Preserving in Post-Quantum Blockchain-Based Systems: A Systematization of Knowledge. IEEE Access, 13, 41382−41405. DOI: 10.1109/ACCESS.2025.3545943.
  • Lipmaa, H; Parisella, R; Siim, J (2025). On Knowledge-Soundness of Plonk in ROM from Falsifiable Assumptions. Advances in Cryptology – CRYPTO 2025 45th Annual International Cryptology Conference. Proceedings, Part VII: Santa Barbara, CA, USA, August 17–21, 2025. Ed. Kamara, S; Tauman Kalai, Y. Springer, Cham, 362−395. (LNCS; 16006). DOI: 10.1007/978-3-032-01907-3_12.
  • Bollauf, Maiara; Parisella, Roberto; Siim, Janno (2025). Revisiting Discrete Logarithm Reductions. Iacr Communications in Cryptology, 2 (2). DOI: 10.62056/a0c3c3c2h.
  • Lipmaa, H. (2025). Plonk is Simulation Extractable in ROM Under Falsifiable Assumptions. TCC 2025: TCC 2025, Aarhus, Denmark, December 1-5, 2025. Springer, Cham, 3−36. (LNCS; 16271). DOI: 10.1007/978-3-032-12290-2_1.
  • Düzgün, Baran; Riet, Ago-Erik; Taranchuk, Vladislav (2025). New constructions of unbalanced \{C_4,\theta_{3,t}\}-free bipartite graphs. European Conference on Combinatorics, Graph Theory and Applications 2025 (EuroComb'25), Budapest, Hungary, 2025. SpringerLink (Springer Nature Switzerland AG) [ilmumas].
  • Bollauf, Maiara F.; Lie, Maja; Ling, Cong (2025). On Gaussian Sampling for q-ary Lattices and Linear Codes with Lee Weight. Advances in Cryptology – CRYPTO 2025. 45th Annual International Cryptology Conference. Proceedings, Part I: Santa Barbara, CA, USA, August 17–21, 2025. Springer , 321−352. (Lecture Notes in Computer Science; 16000). DOI: 10.1007/978-3-032-01855-7_11.
  • Bastos, Gustavo T.; Bollauf, Maiara F.; Ferrari, Agnaldo J.; Ytrehus, Oyvind (2025). Linearity of Z2L-linear codes via Schur product. Designs Codes and Cryptography, 1−31. DOI: 10.1007/s10623-025-01713-w.
  • Bollauf, Maiara F.; Lin, Hsuan-Yin (2025). Generalized Theta Series of a Lattice. 2025 IEEE Information Theory Workshop (ITW). IEEE, 827−832. DOI: 10.1109/ITW62417.2025.11240478.
  • Tok, Zaliha Yuce; Akleylek, Sedat; Evcil, Mustafa; Babir, Isa Can; Isikci, Yigit Emir; Peker, Mustafa Emir (2025). Lightweight post-quantum authentication and key establishment protocol for satellite communication systems. IET Conference Proceedings, 124−128. DOI: 10.1049/icp.2025.404.
  • Sezer, Bora Bugra; Akleylek, Sedat (2026). Lattice-based blockchain platform for IoT: Privacy-enhanced application with lattice-based blind signatures. Computer Standards & Interfaces, 96, ARTN 104077. DOI: 10.1016/j.csi.2025.104077.
  • Seyhan, Kübra; Akleylek, Sedat; Vazquez Castro, Angeles (2025). A lightweight post-quantum authentication framework for next-generation satellite communication standards. 2025. IET Conference Proceedings, 238−245. DOI: 10.1049/icp.2025.4073.

(Coped on 25.12.25)