Sujoy Sinha Roy
Assoc.Prof. PhDSecure Systems, Associate Professor
Dr. Sujoy Sinha Roy is a tenured Associate Professor at Graz University of Technology (TU Graz), where he leads the CryptEng group. His research lies in cryptographic engineering, with a focus on secure and efficient implementation of post-quantum cryptography, fully homomorphic encryption, side-channel security, and hardware/software acceleration of advanced cryptographic protocols.
He received his PhD degree from COSIC group of KU Leuven in 2017. His thesis received the IBM Innovation Award. He has obtained his habilitation in January 2024 from TU Graz in Applied Computer Science.
Teaching
- Cryptography on Hardware Platforms
- Cryptography on Software Platforms
- Algorithm to Hardware using HLS
Focus Area
- Post-quantum cryptography
- Privacy-preserving cryptographic techniques
- Cryptographic proofs
Alumni
Current PhD Researchers
Photo taken when we were trying to find a patent idea in Tesla's research lab.
Achievements by CryptEng Students
- Aikata won the ÖAW Critical Infrastructure Award 2025 (Austrian Academy of Sciences) for PhD research in PQC and FHE.
- Florian Krieger received the Austrian "Würdigungspreis" (2024), a federal award recognizing top 55 graduates among 16,000+ across all Austrian universities.
- Aloha-HE named finalist in the Open Hardware Competition 2024.
- Florian Krieger received WKO Steiermark Research Grant for his master's thesis on client-side FHE.
- Aikata awarded 1st prize for Best Master's Thesis at TU Graz Forum Technology and Society 2022 for her work on efficient polynomial arithmetic for Saber and Dilithium.
Reviewer in Conference PC
TCHES 26-23, DATE 26-24, Asiacrypt 26-25, Eurocrypt 26, DAC 24, ...
Associate Editor
- IEEE Transactions on Emerging Topics in Computing
- Springer Journal of Cryptographic Engineering
- Elsevier Journal of Information Security and Applications
Publications
Using Learning with Rounding to Instantiate Post-Quantum Cryptographic Algorithms
Basso A., Bos J., D’Anvers J., Karmakar A., Bermudo Mera J., Renes J., Sinha Roy S., Vercauteren F., Wang P., Wang Y., Zhang S., Zhong C.
ACM Transactions on Embedded Computing Systems, Vol. 25(4), 2026
Chiplet-Based Techniques for Scalable and Memory-Aware Multiscalar Multiplication on Hardware Platforms
Hirner F., Krieger F., Sinha Roy S.
IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2026
SASTA
Aikata A., Dabholkar A., Saha D., Sinha Roy S.
ASIA CCS 2026 - Proceedings of the 21st ACM ASIA Conference on Computer and Communications Security
Chiplet-Based Techniques for Scalable and Memory-Aware Multi-Scalar Multiplication on Hardware Platforms
Hirner F., Krieger F., Sinha Roy S.
2026
Efficient Parallelization of Large-Scale Modular Multiplication via Low-Latency LogJumps
Kirbiyik S., Czuprynko M., Krieger F., Hirner F., Sinha Roy S.
FPL 2026