Project Areas

S – Solutions

S7 – Secure and Scalable Blockchain Technology

This project will address the current scalability challenges of decentralized blockchain technology. The overall goal is to develop protocols that achieve similar efficiency as centralized systems, while at the same time guaranteeing strong security against realistic adversaries. To accomplish this goal, the project will investigate two main directions. First, it will develop novel consensus mechanisms with significantly improved transaction throughput and reduced latency. Second, the project will design off-chain protocols, which support high transaction throughput by keeping the vast majority of transactions off-chain.

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Principal Investigators

  Name Working area(s) Contact
Prof. Sebastian Faust
Applied Cryptography
S7, P2
+49 6151 16-25710
S2|20 308
Prof. Ahmad-Reza Sadeghi
System Security
P3, S2, S7
+49 6151 16-25328
S2|20 305

Researchers

  Name Contact
Poulami Das
Applied Cryptography
+49 6151 16-25727
S2|20 315
Andreas Erwig
Applied Cryptography
+49 6151 16-25719
S2|20 314
David Kretzler
Applied Cryprography
+49 6151 16-75264
S2|20 316
Max Orlt
Applied Cryptography
+49 6151 16-25721
S2|20 313
Siavash Riahi
Applied Cryptography
+49 6151 16-25721
S2|20 314
Benjamin Schlosser
+49 6151 16-25728
S2|20 316

Publications

Aumayr, Lukas and Ersoy, Oguzhan and Erwig, Andreas and Faust, Sebastian and Maffei, Matteo and Moreno-Sanchez, Pedro (2021):
Bitcoin-Compatible Virtual Channels.
42nd IEEE Symposium on Security and Privacy, virtual Conference, 23.-27.05.2021, [Conference or Workshop Item]

Erwig, Andreas and Faust, Sebastian and Hostáková, Kristina and Maitra, Monosij and Riahi, Siavash (2021):
Two-Party Adaptor Signatures From Identification Schemes.
24th International Conference on Practice and Theory of Public-Key Cryptography, virtual Conference, 09.-13.05.2021, [Conference or Workshop Item]

Alkeilani Alkadri, Nabil and Das, Poulami and Erwig, Andreas and Faust, Sebastian and Krämer, Juliane and Riahi, Siavash and Struck, Patrick (2020):
Deterministic Wallets in a Quantum World.
ACM, The 27th ACM Conference on Computer and Communications Security (CCS 2020), virtual Conference, 09.-13.11., [Conference or Workshop Item]

Eckey, Lisa and Faust, Sebastian and Schlosser, Benjamin (2020):
OptiSwap: Fast Optimistic Fair Exchange.
pp. 543-557, ACM, 15th ACM Asia Conference on Computer and Communications Security (ASIA CCS '20), virtual Conference, 05.-09.10., ISBN 978-1-4503-6750-9,
DOI: 10.1145/3320269.3384749,
[Conference or Workshop Item]

Erwig, Andreas and Hesse, Julia and Orlt, Maximilian and Riahi, Siavash (2020):
Fuzzy Asymmetric Password-Authenticated Key Exchange.
26th Annual International Conference on the Theory and Application of Cryptology and Information Security (Asiacrypt 2020), virtual Conference, 07.-11.12., [Conference or Workshop Item]

Lohr, Matthias and Schlosser, Benjamin and Jürjens, Jan and Staab, Matthias (2020):
Cost Fairness for Blockchain-Based Two-Party Exchang Protocols.
3rd IEEE International Conference on Blockchain, virtual Conference, 02.-06.11.2020, [Conference or Workshop Item]

Das, Poulami and Faust, Sebastian and Loss, Julian (2019):
A Formal Treatment of Deterministic Wallets.
ACM CCS 2019 - Symposium on Computer and Communications Security, London, UK, November, 11th -15th, [Conference or Workshop Item]

Das, Poulami and Eckey, Lisa and Frassetto, Tommaso and Gens, David and Hostáková, Kristina and Jauernig, Patrick and Faust, Sebastian and Sadeghi, Ahmad-Reza (2019):
FastKitten: Practical Smart Contracts on Bitcoin.
28th USENIX Security Symposium, Santa Clara, CA, USA, 14.-16.08.2019, [Conference or Workshop Item]

Dziembowski, Stefan and Eckey, Lisa and Faust, Sebastian and Hesse, Julia and Hostakova, Kristina (2019):
Multiparty Virtual State Channels.
In: Eurocrypt 2019,
Darmstadt, IACR, 38th Annual International Conference on the Theory and Applications of Cryptographic Techniques, [Conference or Workshop Item]

Das, Poulami and Eckey, Lisa and Frassetto, Tommaso and Gens, David and Hostakova, Kristina and Jauernig, Patrick and Faust, Sebastian and Sadeghi, Ahmad-Reza (2019):
FastKitten: Practical Smart Contracts on Bitcoin.
Cryptology ePrint Archive, Report 2019/154, [Report]

Dziembowski, Stefan and Eckey, Lisa and Faust, Sebastian and Malinowski, Daniel (2019):
Perun: Virtual Payment Hubs over Cryptocurrencies.
pp. 327-340, IEEE Computer Society, 39th IEEE Symposium on Security and Privacy, THE HYATT REGENCY, SAN FRANCISCO, CA, MAY 21-23, 2018, [Conference or Workshop Item]

Dziembowski, Stefan and Faust, Sebastian and Zebrowski, Karol (2019):
Simple Refreshing in the Noisy Leakage Model.
IACR, The 25th Annual International Conference on the Theory and Application of Cryptology and Information Security, Kobe, Japan, 8.12.-12.12. 2019, [Conference or Workshop Item]

Dziembowski, Stefan and Eckey, Lisa and Faust, Sebastian (2018):
FairSwap: How to fairly exchange digital goods.
In: Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security,
ACM, 25th ACM Conference on Computer and Communications Security (CCS), Toronto, Canada, 15-19 October 2018, [Conference or Workshop Item]

Dziembowski, Stefan and Faust, Sebastian and Hostakova, Kristina (2018):
General State Channel Networks.
2018, In: Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security,
ACM, 25th ACM Conference on Computer and Communications Security (CCS), Toronto, Canada, 15-19 October 2018, [Conference or Workshop Item]

du Crest de Villeneuve, Come (2018):
Evaluation of the Efficiency of different Architectures and Pathfinding Algorithms.
TU Darmstadt, [Master Thesis]

Amler, Hendrik (2018):
Evaluation of payment channel networks for micropayments.
TU Darmstadt, [Master Thesis]

Varky, Jacek (2018):
TeePay – Using Trusted Execution Environments for Off-chain Payment.
TU Darmstadt, [Master Thesis]

van der Wijden, Marius (2018):
Payment and State Channels in practice.
TU Darmstadt, [Master Thesis]