| 05/26 | Our group has new accepted papers at Crypto 2026 and SCN 2026: - New Straight-Line Extractable NIZKPs for Cryptographic Group Actions. Andrea Flamini, Federico Pintore, Edoardo Signorini, Giovanni Tognolini. Crypto 2026.
- Orthus: Practical Sublinear Batch-Verification of Lattice Relations from Standard Assumptions. Madalina Bolboceanu, Jonathan Bootle, Vadim Lyubashevsky, Antonio Merino-Gallardo, and Gregor Seiler. Crypto 2026.
- Proof-Carrying Data via Holography Accumulation. Nikitas Paslis, Carla Ràfols, Alexandros Zacharakis. SCN 2026.
- Signatures with Post-Compromise Accountability. Dennis Dayanikli, Johannes Lang, Anja Lehmann. SCN 2026 -- based on Johannes Master's Thesis.
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| 05/26 | Busy week at Eurocrypt: Karla, Cavit, Andrea, Alexandros and Anja presented their works at the largest cryptography concerence and affiliated workshops MORE |
| 04/26 | We welcome Vera Wesselkamp as new PhD student in our group! |
| 03/26 | Our group hosted the 11th edition of the Young Researcher Crypto Seminar, led by PhD students Karla Friedrichs, Cavit Özbay, Andrey Sidorenko, and assistant Mélanie Angoujard.
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| 01/26 | Two papers have been accepted at the IACR Eurocrypt conference: "Device-Bound Anonymous Credentials With(out) Trusted Hardware" by Karla Friedrichs, Franklin Harding, Anja Lehmann, Anna Lysyanskaya, and "Putting Multi into Multi-Signatures: Tight Security for Multiple Signers" by Anja Lehmann and Cavit Özbay. Congrats! |
| 01/26 | Anja Lehmann gave a keynote presentation on "The wonderful world of cryptographic pseudonyms" at the DSK European Data Privacy Day. |
| 12/25 | Awards for excellent master theses: Karla Friedrichs hat won the 1st and Konrad Hanff the 3rd price of the CAST-Award IT-Security 2025 for their master theses. Congratulations! |
| 12/25 | Anja Lehmann gave a joint invited talk "EUDI Wallet: Perspectives and Challenges for ZKP and PQC" with Gregor Seiler at the European Conference on PQC Migration in Den Haag. |
| 11/25 | The paper "Multi-Party Private Join" by Anja Lehmann, Christian Mouchet and Andrey Sidorenko has been accepted at PETS 2026. The paper is based on Andrey's Master thesis. Congratulations! |
| 11/25 | Anja Lehmann participated in the Falling Walls Science Summit, and discussed “Hidden Structures: The Secret Life of your Digital Footprint” together with Felix Naumann. |
| 10/25 | Two papers on anonymous credentials have been accepted at the Security Standardisation Research Conference 2025: "SoK: Anonymous Credentials for Digital Identity Wallets" by Christian Bormann and Anja Lehmann, as well as "Vision: A Modular Framework for Anonymous Credential Systems" by Anja Lehmann, Andrey Sidorenko and Alexandros Zacharakis. Both works were done in the context of the EUDI project with SPRIND. |
| 10/25 | Anja Lehmann gave a presentation on ZKP Innovation Highlights at the SPRIND Funke conference on EUDI Wallet Prototypes. |
| 10/25 | We welcome Dr. Andrea Flamini to our team, who is joining as a Postdoc! |
| 09/25 | We support the recent Open Letter against EU's plans for chat control, which has been signed by more than 800 scientists. |
| 08/25 | The paper "Game Changer: A Modular Framework for OPRF Security" by Karla Friedrichs, Anja Lehmann and Cavit Özbay has been accepted at IACR Asiacrypt 2025. The paper is based on Karla's Master thesis. Congratulations! |
| 08/25 | We welcome Dr. Alexandros Zacharakis to our team, who is joining as a Postdoc! |
| 07/25 | Two papers have been accepted at ACM CCS 2025: "Updatable aPAKE: Security Against Bulk Precomputation Attacks" by Dennis Dayanikli and Anja Lehmann; and "Security Analysis of Privately Verifiable Privacy Pass" by Konrad Hanff, Anja Lehmann and Cavit Özbay, based on the Master thesis of Konrad. |
| 07/25 | The paper "Accurate and Composable Noise Estimates for CKKS with Application to Exact HE Computation" by Jean-Philippe Bossuat, Anamaria Costache, Christian Mouchet, Lea Nürnberger and Juan Ramón Troncoso-Pastoriza was accepted in the IACR Communications in Cryptology journal. |
| 05/25 | Double the Honors: Teaching and Graduation Awards for the Team! Our research group lead Anja Lehmann has been awarded the Teaching Award for outstanding dedication to education! And to top it off, Karla Friedrichs received the Graduation Award. Congratulations! We’re also proud that the team for the lecture „Introduction to Cryptography“ (Anja Lehmann, Dennis Dayanikli, Karla Friedrichs, Andrey Sidorenko, and Ronja Wagner) was nominated for the Teaching Team Award. Congratulations to the awardees and to the team! MORE |
