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Impossibility of VDFs in the ROM: The Complete Picture
This paper is concerned with the question whether Verifiable Delay Functions (VDFs), as introduced by Boneh et al. [CRYPTO 2018], can …
Hamza Abusalah, Karen Azari, Chethan Kamath, Erkan Tairi, Maximilian Von Consbruch
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On Verifiable Delay Functions from Time-Lock Puzzles
A verifiable delay function (VDF) [Boneh et al., CRYPTO 2018] is a function that is slow-to-compute, but is quickly verifiable given a …
Hamza Abusalah, Karen Azari, Dario Fiore, Chethan Kamath, Erkan Tairi
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Hardness of M-LWE with General Distributions and Applications to Leaky Variants
The Module Learning With Errors (M-LWE) problem has become a fundamental hardness assumption for lattice-based cryptography. It offers …
Katharina Boudgoust, Corentin Jeudy, Erkan Tairi, Weiqiang Wen
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Registered Functional Encryption for Pseudorandom Functionalities from Lattices: Registered ABE for Unbounded Depth Circuits and Turing Machines, and More
Registered functional encryption (RFE) is a generalization of public-key encryption that enables computation on encrypted data (like …
Tapas Pal, Robert Schädlich, Erkan Tairi
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LeOPaRd: Towards Practical Post-Quantum Oblivious PRFs via Interactive Lattice Problems
In this work, we introduce a more efficient post-quantum oblivious PRF (OPRF) design, called LeOPaRd. Our proposal is round-optimal and …
Muhammed F. Esgin, Ron Steinfeld, Erkan Tairi, Jie Xu
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