Jonas Meers

Jonas Meers

Cryptographer at Cryptosolutions GmbH

Cryptosolutions GmbH

Biography

I am a cryptography consultant and researcher at Cryptosolutions GmbH.

Before that, I was a PhD student at Ruhr University Bochum under the supervision of Eike Kiltz and Peter Schwabe. My research concerned post-quantum public key cryptography with a particular focus on isogeny based cryptosystems. My second research area involves cryptanalysis of post-quantum secure cryptography.

During my Ph.D. I was fortunate to visit both the COSIC group at KU Leuven, where I was hosted by Frederik Vercauteren, as well as Luca De Feo at IBM Research in Switzerland.

I served as a reviewer for the following conferences:

  • CRYPTO 2023
  • TCC 2023
  • ESORICS 2023
  • EUROCRYPT 2024, 2026
  • PQCrypto 2024

I was credited for the following security vulnerabilities:

  • CVE-2019-13990

In my free time I enjoy taking photos, especially of insects.

Interests
  • Post-Quantum Cryptography
  • Public Key Cryptography
  • Isogenies
  • Cryptanalysis
Education
  • Ph.D. in Computer Science, 2026

    Ruhr University Bochum

  • M.Sc. in Computer Science, 2021

    Karlsruher Institute of Technology

  • B.Sc. in Computer Science, 2018

    University of Lübeck

Recent Publications

(2025). Leveled Isogeny Problems with Hints. In PKC 2026.

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(2025). Snake Mackerel: An Isogeny-Based AKEM Leveraging Randomness Reuse.

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(2025). Side-Channel Secure CSIDH with Projective Coordinates. In Communications in Cryptology 2026.

(2025). Orient Express: Using Frobenius to Express Oriented Isogenies. In LatinCrypt 2025.

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(2025). A Little LESS Secure - Side-Channel Attacks Exploiting Randomness Leakage. In Crypto 2026.

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(2024). CCA Secure Updatable Encryption from Non-Mappable Group Actions. In PQCrypto 2024.

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(2023). Solving the Hidden Number Problem for CSIDH and CSURF via Automated Coppersmith. In AsiaCrypt 2023.

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(2023). Generic Models for Group Actions. In PKC 2023.

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(2022). Group Action Key Encapsulation and Non-Interactive Key Exchange in the QROM. In AsiaCrypt 2022.

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Photography

Some shots I’ve taken as a hobby photographer.