Sven Schäge

Sven Schäge is an Assistant Professor at the Department of Mathematics and Computer Science at Eindhoven University of Technology (TU/e). His research focuses on cryptographic protocols, particularly on developing robust theoretical frameworks for secure digital signatures and key exchange mechanisms with strong security and efficiency guarantees.

• Specializes in tight cryptographic reductions and realistic security models
• Works on authenticated key exchange protocols and post-quantum cryptography
• Part of the Coding Theory and Cryptology group

Research Interests: Schäge investigates fundamental limitations in cryptographic tasks, using provable security paradigms and meta-reductions to establish theoretical boundaries. His work includes optimizing communication complexity in key exchange protocols (e.g., the TOPAS protocol) and analyzing algebraic signature schemes vulnerable to linear combination attacks. He emphasizes practical instantiations of cryptographic primitives without relying on random oracles.

Grants: Funded by the German Federal Ministry of Education and Research (BMBF) for projects DigiSeal (16KIS0695) and Huawei Technologies Düsseldorf for vHSM. Also supported by the European Union's Horizon Europe program (101096435) for CONFIDENTIAL6G.

Collaborations: Collaborated with leading cryptographers like Eike Kiltz, Tibor Jager, and Tanja Lange. Key contributions include the TOPAS protocol and evaluations of post-quantum cryptographic candidates.