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Technical University of Munich
Technical University of Munich

Foto von Patrick Karl

M.Sc. Patrick Karl

Research Interests

My research focuses on efficient hardware implementations for post-quantum cryptography. More specifically, I am interested in hardware acceleration for digital signature algorithms on RISC-V platforms for embedded systems. This includes not only performance optimizations, but also aims to improve power and energy consumption. Another important aspect is securing implementations against physical attacks, i.e. side-channel and fault-attacks. Besides FPGA prototyping I am also involved in ASIC design and tape-out. Additional interests include advanced cryptographic approaches like homomorphic- or attribute-based encryption. In short:

  • Post-Quantum Cryptography
  • Efficient Hardware Implementations
  • Countermeasures against Physical Attacks
  • FPGA and ASIC design

I also contributed to the two NIST submissions CROSS and FuLeeca

Teaching

Publications

  • Karl, Patrick and Schupp, Jonas and Sigl, Georg: Performance and Communication Cost of Hardware Accelerators for Hashing in Post-Quantum Cryptography. ACM Trans. Embed. Comput. Syst., 2024 more… BibTeX Full text ( DOI )
  • Karl, Patrick and Schupp, Jonas and Sigl, Georg: The Impact of Hash Primitives and Communication Overhead for Hardware-Accelerated SPHINCS+. Constructive Side-Channel Analysis and Secure Design. COSADE 2024, Springer, Cham, 2024 more… BibTeX Full text ( DOI )
  • Schupp, Jonas Karl, Patrick Nöpel, Jens Hepp, Alexander Music, Tim Sigl, Georg: RISC-V Triplet: Tapeouts for Security Applications. 2024 IEEE Nordic Circuits and Systems Conference (NorCAS), 2024Lund / Sweden more… BibTeX Full text ( DOI )
  • Karl, Patrick and Schupp, Jonas and Fritzmann, Tim and Sigl, Georg: Post-Quantum Signatures on RISC-V with Hardware Acceleration. ACM Trans. Embed. Comput. Syst., 2023 more… BibTeX Full text ( DOI )
  • Schupp, Jonas and Karl, Patrick and Sigl, Georg: Silicon Proven Hardware Acceleration of Post-Quantum Cryptography on RISC-V. RISC-V Summit Europe 2023, RISC-V Europe, 2023 more… BibTeX
  • Ritterhoff, Stefan and Maringer, Georg and Bitzer, Sebastian and Weger, Violetta and Karl, Patrick and Schamberger, Thomas and Schupp, Jonas and Wachter-Zeh, Antonia: FuLeeca: A Lee-Based Signature Scheme. Code-Based Cryptography, Springer Nature Switzerland, 2023CBCrypto 2023: 4th International Workshop on Code-Based Cryptography more… BibTeX Full text ( DOI )
  • Stelzer, Tobias and Oberhansl, Felix and Schupp, Jonas and Karl, Patrick: Enabling Lattice-Based Post-Quantum Cryptography on the OpenTitan Platform. Workshop on Attacks and Solutions in Hardware Security Ashes 2023, Association for Computing Machinery, 2023Copenhagen, Denmark, 51–60 more… BibTeX Full text ( DOI )
  • Aksoy, Levent and Basu Roy, Debapriya and Imran, Malik and Karl, Patrick and Pagliarini, Samuel: Multiplierless Design of Very Large Constant Multiplications in Cryptography. Transactions on Circuits and Systems II: Express Briefs, 2022 more… BibTeX Full text ( DOI )
  • Karl, Patrick and Fritzmann, Tim and Sigl, Georg: Hardware Accelerated FrodoKEM on RISC-V. 2022 25th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS), IEEE, 2022Prague, Czech Republic more… BibTeX Full text ( DOI )
  • Gruber, Michael and Probst, Matthias and Karl, Patrick and Schamberger, Thomas and Tebelmann, Lars and Tempelmeier, Michael and Sigl, Georg: DOMREP – An Orthogonal Countermeasure for Arbitrary Order Side-Channel and Fault Attack Protection. IEEE Transactions on Information Forensics and Security (16), 2021, 4321-4335 more… BibTeX Full text ( DOI )
  • Fritzmann, Tim and Van Beirendonck, Michiel and Basu Roy, Debapriya and Karl, Patrick and Schamberger, Thomas and Verbauwhede, Ingrid and Sigl, Georg: Masked Accelerators and Instruction Set Extensions for Post-Quantum Cryptography. IACR Transactions on Cryptographic Hardware and Embedded Systems 2022 (1), 2021, 414-460 more… BibTeX Full text ( DOI )
  • Gruber, Michael and Karl, Patrick and Sigl, Georg: Algebraic Fault Analysis of Subterranean 2.0. 2021 Workshop on Fault Detection and Tolerance in Cryptography (FDTC), 2021Milano, Italy more… BibTeX Full text ( DOI )
  • Karl, Patrick and Gruber, Michael: A Survey on the Application of Fault Analysis on Lightweight Cryptography. 2021 11th IFIP International Conference on New Technologies, Mobility and Security (NTMS), IEEE, 2021Paris, France more… BibTeX Full text ( DOI )
  • Patrick Karl and Michael Tempelmeier: A Detailed Report on the Overhead of Hardware APIs for Lightweight Cryptography. Cryptology ePrint Archive, Report 2020/112, 2020 more… BibTeX

Talks

  • Guest presentation - Cryptographic Engineering Research Group (CERG GMU), April 2024 (Fairfax VA, USA)
    "Post-Quantum Cryptography and HW-/SW- Codesign"
  • PhD Seminar - Chair of Security in Information Technology (TUM), Jan 2024 (Munich),
    "The Post-Quantum Signature Scheme CROSS - An Introduction to Engineers"
  • PQC-Update 2023, 2023 (Garching):
    "Post-Quantum Signatures on RISC-V with Hardware Acceleration"
  • TASER workshop, 2022 (Leuven):
    "A 22nm ASIC for Flexible Post-Quantum Cryptography"
  • SAFEST Summer School, 2022 (Montpellier):
    "RISC-V: Security with and in an open-source Instruction Set"

  • NIST Lightweight Cryptography Workshop, 2020 (virtual):
    "A Detailed Report on the Overhead of Hardware APIs for Lightweight Cryptography"

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