Dr. Shahram Rasoolzadeh

Ruhr University Bochum,
Faculty of Computer Science,
Chair for Symmetric Cryptography,
Universitätsstr. 150,
D-44801 Bochum.

Room: MC 1.39

Telephone: +49(0) 234 32 28126

Office Hours: by arrangement

E-Mail: shahram.rasoolzadeh@rub.de

Curriculum Vitae

  • 02/2024 – Present: Post-Doctoral Researcher, Sym­me­tric Cryp­to­gra­phy Group, Faculty of Computer Science, Ruhr Uni­ver­si­ty Bo­chum, Bochum, Ger­ma­ny.
  • 01/2021 – 01/2024: Post-Doctoral Researcher, Sym­me­tric Cryp­to­gra­phy, Digital Security Group, Radboad Uni­ver­si­ty, Nijmegen, The Netherlands.
  • 11/2016 – 12/2020: PhD Re­se­arch As­sis­tant, Sym­me­tric Cryp­to­gra­phy & Em­bed­ded Se­cu­ri­ty Groups, HGI, Ruhr Uni­ver­si­ty Bo­chum, Bochum, Ger­ma­ny.
  • 01/2016 – 09/2016: Re­se­ar­ch As­sis­tant, Simula@​UiB, Si­mu­la Re­se­arch La­bo­ra­to­ry, Ber­gen, Nor­way.
  • 09/2013 – 09/2015: M.​Sc. in Elec­tri­cal En­gi­nee­ring – Cryp­to­gra­phy, Sharif Uni­ver­si­ty of Tech­no­lo­gy, Tehr­an, Iran.
  • 09/2008 – 06/2013: B.​Sc. in Elec­tri­cal En­gi­nee­ring – Com­mu­ni­ca­ti­on Sys­tems, University of Tab­riz, Tab­riz, Iran.

Research Interests

  • De­sign and Ana­ly­sis of Sym­me­tric Cryptographic Pri­mi­ti­ves,
  • Boolean Functions and their Application in Symmetric Cryptography.

Awards & Prizes

  • Best Paper Award from FSE/ToSC 2024, for the paper “Cryptanalysis of HALFLOOP Block Ciphers: Destroying HALFLOOP-24”, together with Gregor Leander & Lukas Stennes.
  • Outstanding Research Award 2022 from Intel Corporate Research Council, for collaborative research on “Authenticated Encryption of Content of Memory External to a Processor” within the Group of Prof. Joan Daemen.
  • Best Paper Award from ISeCure 2016, the Iranian Society of Cryptology Journal of Information Security, for the paper “Total Break of Zorro using Linear and Differential Attacks”, together with Zahra Ahmadian, Mahmoud Salmasizadeh, & Mohammad Reza Aref.

Organization of Scientific Meetings

  • Spring School on Symmetric Cryptography:
    Rome, Italy, 10th-14th March 2025, Co-organizer.
  • Lorentz Workshop on Symmetric Cryptography:
    Beating Real-Time Crypto: Solutions and Analysis,
    Leiden, Netherlands, 22nd-26th April 2024, Co-organizer.
  • Workshop on Low-Latency Encryption,
    Abu Dhabi, UAE, 7th March 2024, affiliated with ACNS 2024, Co-organizer.
    Madrid, Spain, 4th May 2025, affiliated with EuroCrypt 2025, Co-organizer.

Program Committees & Editorial Boards

  • AsiaCrypt: Conference on the Theory and Application of Cryptology and Information Security, 2024
  • ToSC: IACR Transactions on Symmetric Cryptology, 2023/24, 2024/25, 2025/26
  • CiC: IACR Communications in Cryptology, 2025
  • SAC: International Conference on Selected Areas in Cryptography, 2025
  • ACNS: Conference on Applied Cryptography and Network Security, 2024, 2025
  • LightSec: Workshop on Lightweight Cryptography for Security & Privacy, 2025
  • InsCrypt: Conference on Information Security and Cryptology, 2024
  • WCC: Workshop on Coding and Cryptography, 2024
  • ISC: Information Security Conference, 2023
  • SPACE: Conference on Security, Privacy and Applied Cryptographic Engineering, 2021

Teaching Experiences

  • Symmetric Cryptanalysis (Fall 2024),
  • Calculus & Probability Theory (Spring 2023) at Radboud University.

Publications

  1. Multiple-Tweak Differential Attack Against SCARF.
    Christina Boura, Shahram Rasoolzadeh, Dhiman Saha, and Yosuke Todo
    Advances in Cryptology – ASIACRYPT 2024, Part VII, vol. 15490 LNCS, Springer, pp. 330-360, (2024).
  2. Classification of Quadratic and Cubic t-Resilient Boolean Functions with t+5 Variables.
    Shahram Rasoolzadeh.
    IACR Transactions on Symmetric Cryptology (ToSC) 2024.3, pp. 298-301, (2024).
  3. Markov Eigenvalues.
    Joan Daemen and Shahram Rasoolzadeh.
    Boolean Functions and their Applications (BFA) 2024, Selected Abstracts, (2024).
  4. Koala: A Low-Latency Pseudorandom Function.
    Parisa Amiri Eliasi, Yanis Belkheyar, Joan Daemen, Santosh Ghosh, Daniël Kuijsters, Alireza Mehrdad, Silvia Mella, Shahram Rasoolzadeh, and Gilles Van Assche.
    Selected Areas in Cryptography (SAC) 2024, vol. xxxxx, LNCS, Springer, pp. xx-xx, (2024).
  5. Cryptanalysis of HALFLOOP Block Ciphers: Destroying HALFLOOP-24.
    Gregor Leander, Shahram Rasoolzadeh, and Lukas Stennes.
    IACR Transactions on Symmetric Cryptology (ToSC) 2023.4, pp. 58-82, (2023).
  6. BipBip: A Low-Latency Tweakable Block Cipher with Small Dimensions.
    Yanis Belkheyar, Joan Daemen, Christoph Dobraunig, Santosh Ghosh, and Shahram Rasoolzadeh.
    IACR Transactions on Cryptographic Hardware and Embedded Systems (TCHES) 2023.1, pp. 326-368, (2023).
  7. Classification of All t-Resilient Boolean Functions with t+4 Variables.
    Shahram Rasoolzadeh.
    IACR Transactions on Symmetric Cryptology (ToSC) 2023.3, pp. 213-226, (2023).
  8. Introducing two Low-Latency Cipher Families: Sonic and SuperSonic.
    Yanis Belkheyar, Joan Daemen, Christoph Dobraunig, Santosh Ghosh, and Shahram Rasoolzadeh.
    IACR Cryptology ePrint Archive, (2023).
  9. Low-Latency Boolean Functions and Bijective S-boxes.
    Shahram Rasoolzadeh.
    IACR Transactions on Symmetric Cryptology (ToSC) 2022.3, pp. 403-447, (2022).
  10. Weak Tweak-Keys for the CRAFT Block Cipher.
    Gregor Leander and Shahram Rasoolzadeh.
    IACR Transactions on Symmetric Cryptology (ToSC) 2022.01, pp. 38-63, (2022).
  11. Impeccable Circuits III.
    Shahram Rasoolzadeh, Aein Rezaei Shahmirzadi, and Amir Moradi.
    IEEE International Test Conference, ITC 2021, IEEE, pp. 163-169, (2021).
  12. The SPEEDY Family of Block Ciphers: Engineering an Ultra Low-Latency Cipher from Gate Level for Secure Processor Architectures.
    Gregor Leander, Thorben Moos, Amir Moradi, and Shahram Rasoolzadeh.
    IACR Transactions on Cryptographic Hardware and Embedded
    Systems (TCHES) 2021.4, pp. 510-545, (2021).
  13. Computing Expected Differential Probability of (Truncated) Differentials and Expected Linear Potential of (Multidimensional) Linear Hulls in SPN Block Ciphers.
    Maria Eichlseder, Gregor Leander, and Shahram Rasoolzadeh
    Progress in Cryptology – INDOCRYPT 2020, vol. 12578 LNCS, Springer, pp. 345-369, (2020).
  14. PRINCEv2 – More Security for (Almost) No Overhead.
    Dusan Bozilov, Maria Eichlseder, Miroslav Knezevic, Baptiste Lambin, Gregor Leander, Thorben Moos, Ventzislav Nikov, Shahram Rasoolzadeh, Yosuke Todo, and Friedrich Wiemer.
    Selected Areas in Cryptography – SAC 2020, vol. 12804 LNCS, Springer, pp. 483-511, (2020).
  15. Impeccable Circuits II.
    Aein Rezaei Shahmirzadi, Shahram Rasoolzadeh, and Amir Moradi.
    ACM/IEEE Design Automation Conference, DAC 2020, IEEE, pp. 1-6, (2020).
  16. Impeccable Circuits.
    Anita Aghaie, Amir Moradi, Shahram Rasoolzadeh, Aein Rezaei Shahmirzadi, Falk Schellenberg, and Tobias Schneider.
    IEEE Transactions on Computers 69.3, pp. 361-376, (2020).
  17. CRAFT: Lightweight Tweakable Block Cipher with Efficient Protection Against DFA Attacks.
    Christof Beierle, Gregor Leander, Amir Moradi, and Shahram Rasoolzadeh.
    IACR Transactions on Symmetric Cryptology (ToSC) 2019.1, pp. 5-45, (2019).
  18. Differential Cryptanalysis of 18-Round PRIDE.
    Virginie Lallemand and Shahram Rasoolzadeh.
    Progress in Cryptology – INDOCRYPT 2017,  vol. 10698 LNCS, Springer, pp. 126-146, (2017).
  19. Refined Probability of Differential Characteristics Including Dependency Between Multiple Rounds.
    Anne Canteaut, Eran Lambooij, Samuel Neves, Shahram Rasoolzadeh, Yu Sasaki, and Marc Stevens.
    IACR Transactions on Symmetric Cryptology (ToSC) 2017.2, pp. 203-227, (2017).
  20. Faster Key Recovery Attack on Round-Reduced PRINCE.
    Shahram Rasoolzadeh and Håvard Raddum.
    Lightweight Cryptography for Security and Privacy (LightSec) 2016, vol. 10098, LNCS, Springer, pp. 3-17, (2017).
  21. Cryptanalysis of 6-round PRINCE using 2 Known Plaintexts.
    Shahram Rasoolzadeh and Håvard Raddum
    ArcticCrypt 2016, Revised Selected Papers, (2016).
  22. Cryptanalysis of PRINCE with Minimal Data.
    Shahram Rasoolzadeh and Håvard Raddum
    Progress in Cryptology – AFRICACRYPT 2016, LNCS vol. 9646 Springer, pp. 109-126, (2016).
  23. Multidimensional Meet in the Middle Cryptanalysis of KATAN.
    Shahram Rasoolzadeh and Håvard Raddum.
    Central European Conference on Cryptography (CECC) 2016, vol. 67, Tatra Mountains Mathematical Publications, pp. 1-18, (2016).
  24. An Improved Truncated Differential Cryptanalysis of KLEIN.
    Shahram Rasoolzadeh, Zahra Ahmadian, Mahmoud Salmasizadeh, and Mohammad Reza Aref.
    Central European Conference on Cryptography (CECC) 2016, vol. 67, Tatra Mountains Mathematical Publications, pp. 1-13, (2016).
  25. Automated Dynamic Cube Attack on Block Ciphers: Cryptanalysis of SIMON and KATAN.
    Zahra Ahmadian, Shahram Rasoolzadeh, Mahmoud Salmasizadeh, and Mohammad Reza Aref.
    IACR Cryptology ePrint Archive, (2015).
  26. Total Break of Zorro using Linear and Differential Attacks.
    Shahram Rasoolzadeh, Zahra Ahmadian, Mahmoud Salmasizadeh, and Mohammad Reza Aref.
    ISC International Journal of Information Security (ISeCure) 6.1, pp. 23-34, (2014).