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A Note on the Post-Quantum Security of (Ring) Signatures [article]

Rohit Chatterjee, Kai-Min Chung, Xiao Liang, Giulio Malavolta
2021 arXiv   pre-print
Prior to this work, the only known blind-unforgeable schemes are Lamport's one-time signature and the Winternitz one-time signature, and both of them are in the quantum random oracle model.  ...  We present two short signature schemes achieving this notion: one is in the quantum random oracle model, assuming quantum hardness of SIS; and the other is in the plain model, assuming quantum hardness  ...  May 1923, 2019.  ... 
arXiv:2112.06078v1 fatcat:potybhcv7nfqbaw4ek5ggiklmu

Prisma: A Tierless Language for Enforcing Contract-Client Protocols in Decentralized Applications (Extended Version) [article]

David Richter, David Kretzler, Pascal Weisenburger, Guido Salvaneschi, Sebastian Faust, Mira Mezini
2022 arXiv   pre-print
In this paper, we present Prisma, a language for tierless decentralized applications, where the contract and its clients are defined in one unit and pairs of send and receive actions that "belong together  ...  Decentralized applications (dApps) consist of smart contracts that run on blockchains and clients that model collaborating parties. dApps are used to model financial and legal business functionality.  ...  In Yuval Ishai and Vincent Rijmen, editors, Advances in Cryptology -EUROCRYPT 2019 -38th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Darmstadt, Germany,  ... 
arXiv:2205.07780v1 fatcat:plscefwjtjdvjmpzjzvqfetqhi

Aleph: Efficient Atomic Broadcast in Asynchronous Networks with Byzantine Nodes [article]

Adam Gągol, Damian Leśniak, Damian Straszak, MichałŚwiętek
2019 arXiv   pre-print
We develop our protocol on the grounds of the well-established field of Asynchronous Byzantine Fault Tolerant (ABFT) systems.  ...  This allows us to formally reason about correctness, efficiency, and security in the strictest possible model, and thus convincingly prove the overall robustness of our solution.  ...  In Advances in Cryptology -EUROCRYPT 2019 -38th Annual International Conference on the The- ory and Applications of Cryptographic Techniques, Darmstadt, Germany, May 19-23, 2019, Proceedings, Part III  ... 
arXiv:1908.05156v2 fatcat:tenoy74wynghhime6xcznd3rqq

Almost Public Quantum Coins [article]

Amit Behera, Or Sattath
2020 arXiv   pre-print
In this work, we propose a way to lift any private quantum coin scheme -- which is known to exist based on the existence of one-way functions, due to Ji, Liu, and Song (CRYPTO'18) -- to a scheme that closely  ...  The lifting technique when instantiated with the private quantum coins scheme, due to Mosca and Stebila 2010, gives rise to the first construction that is very close to an inefficient unconditionally secure  ...  Rijmen, editors, Advances in Cryptology -EUROCRYPT 2019 -38th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Darmstadt, Germany, May 19-23, 2019, Proceedings  ... 
arXiv:2002.12438v3 fatcat:htaglq7p2vglddutqjayrfymju