| Vol-3504 urn:nbn:de:0074-3504-7 Copyright © 2023 for the individual papers by the papers' authors. Copyright © 2023 for the volume as a collection by its editors. This volume and its papers are published under the Creative Commons License Attribution 4.0 International (CC BY 4.0).

# CQPC 2023
Classic, Quantum, and Post-Quantum Cryptography 2023

### Proceedings of the Workshop on Classic, Quantum, and Post-Quantum Cryptography (CQPC 2023)
co-located with International Conference on Problems of Infocommunications. Science and Technology (PICST 2023)

### Kyiv, Ukraine, August 1, 2023 (online).

Edited by

### Volodymyr Sokolov *
Vasyl Ustimenko **
Mariya Nazarkevych ***

* Borys Grinchenko Kyiv University, Kyiv, Ukraine
** Royal Holloway, University of London, London, UK
*** Lviv Polytechnic National University, Lviv, Ukraine

## Table of Contents

- Preface
  Summary: There were 15 papers submitted for peer-review to this workshop. Out of these, 8 papers were accepted for this volume, 4 as regular papers and 4 as short papers.

- Trade-offs in Post-Quantum Cryptography: A Comparative Assessment of BIKE, HQC, and Classic McEliece 1–11
  Oleksandr Kuznetsov, Sergey Kandiy, Emanuele Frontoni, Oleksii Smirnov
- Multifunctional CRS Encryption Scheme on Isogenies of Non-Supersingular Edwards Curves 12–25
  Anatoly Bessalov, Serhii Abramov, Volodymyr Sokolov, Pavlo Skladannyi, Oleksii Zhyltsov
- Finding a Bit-Sliced Representation of 4×4 S-Boxes based on Typical Logic Processor Instructions 26–38
  Yаroslav Sovyn, Ivan Opirskyy, Olha Mykhaylova
- Analysis of Problems and Prospects of Implementation of Post-Quantum Cryptographic Algorithms 39–49
  Andriy Horpenyuk, Ivan Opirskyy, Pavlo Vorobets
- Linear Codes of Schubert Type and Quadratic Public Keys of Multivariate Cryptography (short paper) 50–56
  Vasyl Ustimenko
- Modular Matrix Multiplication for Cryptographic Conversions (short paper) 57–62
  Sakhybay Tynymbayev, Sergiy Gnatyuk, Rat Berdibayev, Kaiyrbek Makulov, Tetiana Okhrimenko
- Dataset of Cryptographic Algorithms for UAV Image Encryption based on Artificial Neural Networks (short paper) 63–71
  Sergiy Gnatyuk, Andrew Okhrimenko, Denys Navrotskyi, Dmytro Proskurin, Bohdan Horbakha
- Correlation of Bitcoin Price and S&P 500 Company Index (short paper) 72–77
  Avtandil Gagnidze, Maksim Iavich, Giorgi Iashvili, Dali Magraqvelidze, Tetiana Okhrimenko

2023-09-25: submitted by Volodymyr Sokolov, metadata incl. bibliographic data published under Creative Commons CC0
2023-10-13: published on CEUR Workshop Proceedings (CEUR-WS.org, ISSN 1613-0073) |valid HTML5|